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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 1376. Отображено 100.
01-03-2012 дата публикации

Ion sensor for measuring ion concentration of a solution

Номер: US20120048733A1
Автор: Bing-Mau Chen, Chan-Hung Huang, Chen-Hao Kuo, Chia-Hua Chang, Min-Hsiang Hsu, Peichen Yu
Принадлежит: National Chiao Tung University NCTU

An ion sensor includes: a conductive base structure including a substrate and an electrode film formed on the substrate; a plurality of ion-sensitive nanorods protruding from the electrode film; and an encapsulant enclosing the conductive base structure, surrounding the ion-sensitive nanorods, and formed with a window for exposing the ion-sensitive nanorods. Each of the ion-sensitive nanorods has a conductive core and an ion-sensitive layer formed on and enclosing the conductive core. The ion-sensitive material exhibits an ion selectivity of absorbing an ion of interest thereon for inducing a surface potential corresponding to concentration of the ion of interest.

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Номер записи: 1
19-04-2012 дата публикации

Device for detecting an analyte

Номер: US20120090995A1
Автор: Anton Seidl, Eric Lee, Gregory G Wildgoose, Joseph A. Duimstra, Joseph I. Keto, Lee Leonard, Mark Micklatcher, Victor Simonyi
Принадлежит: SENOVA SYSTEMS Inc

Devices for detecting an analyte comprising a redox active analyte sensitive material on a working electrode and computer assisted signal acquisition and processing.

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Номер записи: 2
08-11-2012 дата публикации

Electrochemical ph measurement

Номер: US20120279874A1
Автор: Andrew Meredith, Nathan S. Lawrence
Принадлежит: Schlumberger Technology Corp

A method of measuring pH of aqueous liquid with little or no buffer present uses an electrochemical pH sensor which comprises a plurality of electrodes with a redox active organic compound attached to an electrode and having at least one functional group convertible electrochemically between reduced and oxidized forms with transfer of at least one proton between the compound and surrounding aqueous phase, wherein the compound has at least one substituent group which promotes hydrogen bonding at a said functional group and thereby increases the reaction rate of proton transfer. The substituent group may form an internal hydrogen bond with a redox-convertible group or may enhance polarity to promote electrostatic interaction with water molecules and reduce activation energy. Such an electrochemical sensor may be used for pH measurement in computer controlled equipment for processing an aqueous liquid.

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Номер записи: 3
20-06-2013 дата публикации

REFERENCE ELECTRODE

Номер: US20130153417A1
Автор: Iwamoto Yasukazu, Shibata Manabu
Принадлежит: HORIBA, LTD.

A reference electrode for improving a product life cycle without using a gelled hydrophobic ionic liquid having a prescribed hardness or viscosity and without having a large thickness so as to be difficult to manufacture is provided. The reference electrode is provided with a housing for accommodating an internal electrode, a filler for electrically connecting the internal electrode, and a sample liquid. The filler is formed having a layer between the internal electrode and an opening formed in the housing for contacting the sample liquid and the filler. The filler includes a first layer including a water soluble electrolytic solution formed to be in contact with the internal electrode a second layer including a hydrophobic ionic liquid formed to be in contact with the first layer; and a third layer including a gelled hydrophobic ionic liquid formed in the opening so as to be in contact with the second layer. 1. A reference electrode comprising an internal electrode and a housing that houses a filler for electrically connecting the internal electrode and a sample liquid , whereinthe filler forms layers between the internal electrode and an opening formed in the housing for contacting the sample liquid and the filler, wherein the filler comprises:a first layer which includes a water soluble electrolytic solution formed to be in contact with the internal electrode;a second layer which includes a hydrophobic ionic liquid formed to be in contact with the first layer; anda third layer which includes a gelled hydrophobic ionic liquid formed in the opening so as to be in contact with the second layer.2. The reference electrode according to claim 1 , wherein the water soluble electrolytic solution of the first layer is a gelled solution.3. The reference electrode according to claim 1 , wherein the hydrophobic ionic liquid of the second layer is a non-gelled liquid.4. The reference electrode according to claim 1 , wherein a specific gravity of the water soluble electrolytic ...

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Номер записи: 4
04-07-2013 дата публикации

Analyte sensor

Номер: US20130168609A1
Автор: Eric Lee, Mark Micklatcher
Принадлежит: SENOVA SYSTEMS Inc

Matrix materials, such as sol-gels and polymers derivatives to contain a redox active material can be used to form electrodes and probes suitable for use in pH meters and other analyte sensing devices.

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Номер записи: 5
26-09-2013 дата публикации

ELECTROCHEMICAL SENSORS

Номер: US20130248364A1
Автор: Kahn Carolyn R., Mansour Dean, Norviel Vern, Sidhu Robbie Singh, Wilkins James A., Wong Elicia
Принадлежит:

Systems and methods are provided for detecting the presence of an analyte in a sample. A solid state electrochemical sensor can include a redox active moiety having an oxidation and/or reduction potential that is sensitive to the presence of an analyte immobilized over a surface of a working electrode. A redox active moiety having an oxidation and/or reduction potential that is insensitive to the presence of the analyte can be used for reference. Voltammetric measurements made using such systems can accurately determine the presence and/or concentration of the analyte in the sample. The solid state electrochemical sensor can be robust and not require calibration or re-calibration. 1. A sensor for detecting the presence or absence of an analyte , comprising:an electrode having a surface having immobilized thereon a redox-active moiety, wherein the redox-active moiety exhibits an oxidation potential and/or a reduction potential that is sensitive or insensitive to the presence of the analyte; anda light-emitting device adjacent to said electrode, said light-emitting device configured to generate light.2. The sensor of claim 1 , wherein the light-emitting device is configured to generate light that is i) incident on said surface claim 1 , ii) incident on another surface of said electrode claim 1 , said another surface opposite from said surface claim 1 , and/or iii) directed through said electrode.3. The sensor of claim 1 , wherein the electrode is formed of a semiconductor material.4. The sensor of claim 3 , wherein the semiconductor material includes silicon.5. The sensor of claim 1 , wherein the electrode is formed of a non-semiconductor material.6. The sensor of claim 5 , wherein the non-semiconductor material includes carbon.7. The sensor of claim 1 , wherein the light-emitting device is a light-emitting diode having an active region configured to generate light upon the recombination of electrons and holes.8. The sensor of claim 7 , wherein the light-emitting ...

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Номер записи: 6
06-02-2014 дата публикации

IONIC PROBE

Номер: US20140034516A1
Автор: Livrozet Pierre Antoine Robert, Schvan Jean-Francois Maurice Rene, West Kevin James, Woodward John Robert, Young Russell Martin
Принадлежит: Hach Company

An ionic probe is provided according to the invention. The ionic probe includes an active electrode configured to generate a measurement signal for an external test fluid, a first reference electrode configured to generate a first reference signal, and an at least second reference electrode configured to generate at least a second reference signal. The measurement signal is compared to the first reference signal and the at least second reference signal in order to determine an ionic measurement of the external test fluid. 1. A self-correction method for an ionic meter , comprising:generating a measurement signal using an active electrode disposed in an inner shell of the ionic meter;generating a first reference signal using a first reference electrode disposed in a first reference chamber formed by an inner divider in the inner shell;generating at least a second reference signal using a second reference electrode disposed in a second reference chamber formed by the inner shell and a middle shell of the ionic meter;wherein the inner shell is disposed within the middle shell and the middle shell is disposed within an outer shell; andcomparing the measurement signal to the first reference signal and the at least second reference signal in order to determine an ionic measurement of an external test fluid.2. The method of claim 1 , further comprising comparing the first reference signal to the at least second reference signal in order to determine a correction value to be applied to the ionic measurement.3. The method of claim 1 , further comprising comparing the first reference signal to the at least second reference signal in order to detect a single reference drift in one of the first reference signal or the at least second reference signal.4. The method of claim 1 , further comprising comparing the first reference signal and the at least second reference signal to a predetermined reference voltage in order to detect a dual reference drift in both the first reference ...

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Номер записи: 7
13-02-2014 дата публикации

Electrochemical sensors

Номер: US20140042026A1
Автор: Carolyn R. Kahn, Ellcia Wong, James A. Wilkins, Vern Norviel
Принадлежит: Sensor Innovations Inc

Systems and methods are provided for detecting the presence of an analyte in a sample. A solid state electrochemical sensor can include a redox active moiety having an oxidation and/or reduction potential that is sensitive to the presence of an analyte immobilized over a surface of a working electrode. A redox active moiety having an oxidation and/or reduction potential that is insensitive to the presence of the analyte can be used for reference. Voltammetric measurements made using such systems can accurately determine the presence and/or concentration of the analyte in the sample. The solid state electrochemical sensor can be robust and not require calibration or re-calibration.

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Номер записи: 8
27-03-2014 дата публикации

ELECTROCHEMICAL SENSORS

Номер: US20140083853A1
Автор: Compton Richard G., Lawrence Nathan Scott, McCormack Sean P., Wildgoose Gregory George
Принадлежит: Isis Innovation Ltd.

An electrode for use in a electrochemical sensor comprises carbon modified with a chemically sensitive redox-active compound, excluding an electrode based on carbon having derivatised thereron two redox-active species wherein at least one of said species is selected from anthraquinone, phenanthrenequinone and N,N′-diphenyl-p-phenylenediamine (DPPD). The invention further provides a pH sensor comprising: 1. A method for preparing an electrode for use in an electrochemical sensor , said method comprising modifying carbon with a chemically sensitive redox active material wherein the material is a single redox active species or two redox active species , with the proviso that the material that is two redox active species does not include anthraquinone , phenanthrenequinone or N ,N═-diphenyl-p-phenylenediamine (DPPD) , and wherein the electrode is operable over an entire pH range of 1 to 12.2. A method according to claim 1 , wherein the step of modifying the carbon comprises one or more of the following methods:1) derivatisation via physical adsorption of the chemically sensitive redox active material; and2) physical mixing with the chemically sensitive redox active material and a binder.3. The method according to claim 1 , further comprising the step of applying the carbon modified with the chemically sensitive redox active material to a substrate.4. The method according to claim 3 , wherein the step of applying comprises abrasively immobilising the composition on the surface of the substrate.5. A method for preparing an electrode for use in an electrochemical sensor as claimed in claim 2 , said method comprising modifying carbon with a single chemically sensitive redox active material selected from an anthraquinone claim 2 , phenanthrenequinone or N claim 2 ,N-diphenyl-p-phenylenediamine (DPPD).6. An electrode for use in an electrochemical sensor claim 2 , said electrode comprising carbon and a redox-active compound wherein the redox-active compound is a single redox ...

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Номер записи: 9
03-04-2014 дата публикации

POTENTIOMETRIC SENSOR

Номер: US20140090978A1
Автор: Bower Michael Mason, III Daniel G., Pestana Jose L., Sun Zhisheng, Talutis Stephen B., Tower, West Steven J.
Принадлежит: INVENSYS SYSTEMS INC.

A potentiometric sensor includes an elongate non-glass, non-metal housing having opposite first and second longitudinal ends and a length extending between the first and second longitudinal ends. The housing defines a lumen extending along the length of the housing. A measuring half-cell assembly is received in the lumen of the housing and secured to the housing. The measuring half-cell assembly includes a glass body having opposite first and second longitudinal ends and a length extending between the first and second ends of the glass body. The second longitudinal end of the glass body is adjacent the second longitudinal end of the housing and a longitudinal extent of the glass body is less than the length of the housing. 1. A potentiometric sensor comprising:an elongate non-glass, non-metal housing having opposite first and second longitudinal ends and a length extending between the first and second longitudinal ends, the housing defining a lumen extending along the length of the housing;a measuring half-cell assembly received in the lumen of the housing and secured to the housing, the measuring half-cell assembly including a glass body having opposite first and second longitudinal ends and a length extending between the first and second ends of the glass body, wherein the second longitudinal end of the glass body is adjacent the second longitudinal end of the housing and a longitudinal extent of the glass body is less than the length of the housing.2. The potentiometric sensor of wherein the longitudinal extent of the glass body is less than three-quarters the length of the housing.3. The potentiometric sensor of wherein the longitudinal extent of the glass body is less than one-half the length of the housing.4. The potentiometric sensor of wherein the longitudinal extent of the glass body is less than one-third the length of the housing.5. The potentiometric sensor of wherein the longitudinal extent of the glass body is less than one-fourth the length of the ...

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Номер записи: 10
07-01-2016 дата публикации

Measurement Device with Sensor Array

Номер: US20160003761A1
Автор: CHO Sung Kwon, CLARK William, FLAHERTY J. Christopher, Flaherty R. Maxwell, SYCIARZ Timothy J., Wagner David W., ZHAO Yuejun
Принадлежит:

A system for obtaining a pH measurement includes a disposable probe and a reader. The disposable probe comprises multiple indicating electrodes and at least one reference electrode. The reader is configured to operably engage with the disposable probe and provide pH information of a sample. 1. A system for obtaining a pH measurement comprising:a disposable probe comprising:at least one electrode; andat least one controllable orifice operable to control a fluid pathway to said at least one electrode.23-. (canceled)4. The system of further comprising an electronics module constructed and arranged to activate at least one controllable orifice.5. (canceled)6. The system of wherein the electronics module comprises a lookup table that comprises controllable orifice activation information.7. (canceled)821. The system of claim wherein at least one controllable orifice comprises a membrane.9. The system of wherein the membrane comprises a multi-layer membrane.10. The system of wherein the membrane comprises a heating element constructed and arranged to create an opening in the membrane.1113-. (canceled)14. The system of wherein at least a portion of the heating element is positioned in contact with the membrane.15. (canceled)16. The system of further comprising a reference solution wherein at least one orifice is positioned between a reference solution and an electrode.17. (canceled)18. The system of wherein at least one electrode comprises an iridium oxide electrode.1921-. (canceled)22. The system of further comprising a walled chamber surrounding at least one electrode.2327-. (canceled)28. The system of wherein at least one electrode is manufactured using a MEMS process.2936-. (canceled)37. The system of further comprising a liquid junction.3840-. (canceled)41. The system of further comprising a substrate claim 1 , and wherein the at least one electrode is positioned on and/or proximate to the substrate.4252-. (canceled)53. The system of further comprising a reader ...

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Номер записи: 11
07-01-2016 дата публикации

METHODS FOR GENERATING pH/IONIC CONCENTRATION GRADIENT NEAR ELECTRODE SURFACES FOR MODULATING BIOMOLECULAR INTERACTIONS

Номер: US20160003766A1
Автор: Ahmad Habib, Fomina Nadezda, Gangadharan Rajan, I Aldrich, Johnson Christopher, Kavusi Sam, Lau, Verma Piyush
Принадлежит:

Device and methods for use in a biosensor comprising a multisite array of test sites, the device and methods being useful for modulating the binding interactions between a (biomolecular) probe or detection agent and an analyte of interest by modulating the pH or ionic gradient near the electrodes in such biosensor. An electrochemically active agent that is suitable for use in biological buffers for changing the pH of the biological buffers. Method for changing the pH of biological buffers using the electrochemically active agents. The methods of modulating the binding interactions provided in a biosensor, analytic methods for more accurately controlling and measuring the pH or ionic gradient near the electrodes in such biosensor, and analytic methods for more accurately measuring an analyte of interest in a biological sample. 1. A method comprising:a. adding an electrochemically active agent which is a quinone derivative onto a support of a biosensor; andb. adding an analyte that, in dependence upon a change of a redox state of the quinone derivative, interacts with a probe on the support,c. wherein an electrode of the support is configured to cause the change in the redox state of the quinone derivative.2. The method of claim 1 , wherein the change of the redox state of the quinone derivative allows the interaction between the analyte and the probe to occur.3. The method of claim 1 , wherein the change of the redox state of the quinone derivative increases a binding affinity between the analyte and the probe.4. The method of claim 1 , wherein the change of the redox state of the quinone derivative decreases a binding affinity between the analyte and the probe.5. A method comprising:a. providing a biosensor comprising a support in an aqueous solution,i. the support comprising one or more electrodes, and a biomolecule interface layer having one or more immobilized probes thereon;ii. the aqueous solution comprising a quinone derivative;b. adding a biomolecule analyte ...

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Номер записи: 12
02-01-2020 дата публикации

Sensor arrangement for voltammetry

Номер: US20200003720A1
Автор: Christoph STEFFAN, Inge Siegl
Принадлежит: INFINEON TECHNOLOGIES AG

In some examples, a circuit arrangement has a first output node for connection to a first electrode of the electrochemical cell, a second output node for connection to a second electrode of the electrochemical cell and a third output node for connection to a third electrode of the electrochemical cell. The circuit arrangement further has an interface circuit designed to output a first voltage at the first output node and further designed to output a third voltage at the third output node, which third voltage is set such that a second voltage at the second output node corresponds to a reference voltage. A control unit is designed to set the first voltage such that a predetermined cell voltage is applied between the first and the second output node. The control circuit is further designed to adjust the reference voltage depending on the electrical state of the electrochemical cell.

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Номер записи: 13
07-01-2021 дата публикации

pH MEASUREMENT OF AN AQUEOUS SAMPLE

Номер: US20210003529A1
Автор: Julie Victoria Macpherson, Samuel James Cobb, Zoë Duncan
Принадлежит: Hach Co, University of Warwick

An embodiment provides a device for measuring pH in an aqueous sample, including: at least one measurement electrode comprising a first carbon region, wherein the carbon region comprises a single pH sensitive carbon region, wherein the single pH sensitive carbon region of the measurement electrode is a sp2 carbon region of a boron doped diamond-based pH electrode; at least one reference electrode; at least one auxiliary electrode; and a memory storing instructions executable by a processor to identify a pH of an aqueous sample by measuring an electrical potential between the at least one measurement electrode and the at least one reference electrode. Other aspects are described and claimed.

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Номер записи: 14
04-01-2018 дата публикации

WATER QUALITY MEASUREMENT APPARATUS AND METHOD

Номер: US20180005507A1
Автор: Song Inho
Принадлежит: MOEN INCORPORATED

A water quality measurement apparatus is provided. The apparatus comprises an electrochemical cell, a pH sensor, a temperature sensor, a control circuit, a power source, a database, and a warning device. The electrochemical cell comprises a working electrode, a reference electrode, and a counter electrode. The control circuit provides predetermined adjustable potentials between the reference electrode and the working electrode and measures electrochemical currents between the working electrode and the counter electrode, to form a current diagram based on the predetermined adjustable potentials and the electrochemical currents. The database stores predetermined reference diagrams based on various pH values and temperatures, and is in communication with the control circuit. The warning device is configured to output warnings, wherein the control circuit triggers the warning device in the condition that the current diagram exceeds the predetermined reference diagram based on the same range of the pH values and the temperatures. 1. A water quality measurement apparatus , comprising:an electrochemical cell, comprising a working electrode, a reference electrode, and a counter electrode, wherein the working electrode, the reference electrode, and the counter electrode are configured to be inserted into water to be detected,a pH sensor, configured to detect pH values of the water and to provide a pH signal reflecting the pH values of the detected water to a control circuit,a temperature sensor, configured to detect temperatures of the water, and to provide a temperature signal reflecting the temperatures of the detected water to the control circuit,the control circuit, electrically connected to the electrochemical cell, the pH sensor, and the temperature sensor, wherein the control circuit is configured to provide predetermined adjustable potentials between the reference electrode and the working electrode and to measure electrochemical currents between the working ...

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Номер записи: 15
12-01-2017 дата публикации

ELECTROCHEMICALLY ACTIVE AGENTS FOR PH MODULATION IN BIOLOGICAL BUFFERS

Номер: US20170008825A1
Автор: Ahmad Habib, Fomina Nadezda, Johnson Christopher, Kavusi Sam, Lang Christoph, Maruniak Autumn, RAGHUNATHAN Ashwin
Принадлежит:

Device and methods for use in a biosensor comprising a multisite array of test sites, the device and methods being useful for modulating the binding interactions between a (biomolecular) probe or detection agent and an analyte of interest by modulating the pH or ionic gradient near the electrodes in such biosensor. An electrochemically active agent that is suitable for use in biological buffers for changing the pH of the biological buffers. Method for changing the pH of biological buffers using the electrochemically active agents. The methods of modulating the binding interactions provided in a biosensor, analytic methods for more accurately controlling and measuring the pH or ionic gradient near the electrodes in such biosensor, and analytic methods for more accurately measuring an analyte of interest in a biological sample. 1. An electrochemically active composition comprising a quinone derivative , wherein:a reactivity between a nucleophile and the quinone derivative is reduced compared to a reactivity between the nucleophile and an unsubstituted quinone from which the quinone derivative is derived, andthe composition is configured such that the pH of the composition is electrochemically modulated via the quinone derivative.3. The composition of claim 2 , wherein all of the R groups of the quinone derivative are different from each other.4. The composition of claim 2 , wherein two or more of the R groups of the quinone derivative are the same.5. The composition of claim 1 , wherein the composition is an aqueous solution.6. The composition of claim 1 , further comprising an additive selected from the group consisting of: an aqueous buffer claim 1 , an organic solvent claim 1 , an electrolyte claim 1 , a buffer salt claim 1 , a bioreagent claim 1 , a biomolecule claim 1 , a surfactant claim 1 , a preservative claim 1 , a cryoprotectant claim 1 , and combinations thereof.7. The composition of claim 1 , wherein the one or more nucleophiles are selected from the group ...

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Номер записи: 16
12-01-2017 дата публикации

ELECTRONIC CONTROL OF THE pH OF A SOLUTION CLOSE TO AN ELECTRODE SURFACES

Номер: US20170010238A1
Автор: Ahmad Habib, Fomina Nadezda, Johnson Christopher, Kavusi Sam, Lang Christoph, Maruniak Autumn, RAGHUNATHAN Ashwin
Принадлежит:

Device and methods for use in a biosensor comprising a multisite array of test sites, the device and methods being useful for modulating the binding interactions between a (biomolecular) probe or detection agent and an analyte of interest by modulating the pH or ionic gradient near the electrodes in such biosensor. An electrochemically active agent that is suitable for use in biological buffers for changing the pH of the biological buffers. Method for changing the pH of biological buffers using the electrochemically active agents. The methods of modulating the binding interactions provided in a biosensor, analytic methods for more accurately controlling and measuring the pH or ionic gradient near the electrodes in such biosensor, and analytic methods for more accurately measuring an analyte of interest in a biological sample. 1. A method for controlling a pH of a solution using two or more electrodes , the method comprising:a. measuring an open circuit potential (OCP) of the two or more electrodes in the solution while no current is being applied between the two or more electrodes;b. selecting an amount of current based on the measured OCP; andc. providing the selected amount of current to the solution, thereby changing the pH of the solution by electrochemically generating and/or consuming hydrogen ions.2. The method of claim 1 , wherein electrochemically generating and/or consuming hydrogen ions is achieved by an electrochemical reaction of one or more redox active species in the solution.3. The method of claim 2 , wherein the one or more redox active species is selected from the group consisting of: quinones claim 2 , catechols claim 2 , aminophenols claim 2 , hydrazines claim 2 , derivatives thereof claim 2 , and combinations thereof and optionally the one or more redox active species is a quinone selected from the group consisting of: hydroquinone claim 2 , benzoquinone claim 2 , naphthaquinone claim 2 , derivatives thereof claim 2 , and combinations thereof.4. ...

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Номер записи: 17
09-01-2020 дата публикации

PH VALUE MEASURING DEVICE COMPRISING IN SITU CALIBRATION MEANS

Номер: US20200011830A1
Автор: BERIET Carine, DE COULON Yves, LEMOINE Cyrille
Принадлежит: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT

The invention concerns a device for measuring the pH of an effluent, said device comprising means for measuring an item of information representative of the pH of said effluent intended to be brought into contact with said effluent. 16-. (canceled)7. A method of performing calibrated measurements of the pH of an effluent using a non-glass electrode probe , comprising:placing the probe in contact with the effluent; biasing an ISFET transistor by applying a constant voltage and current across source and drain terminals of the ISFET, a gate terminal of which is insulated from the source and drain terminals and in contact with the effluent and hence at the same voltage as the non-glass reference electrode;', {'sub': 'GS', 'measuring a voltage Vbetween the non-glass reference electrode and the ISFET source terminal;'}, {'sub': GS', 'GS, 'determining the pH of the effluent from Vand a calibration curve expressing Vas a function of the pH of the effluent; and'}], 'repeatedly obtaining measurements of the pH of the effluent by, for each measurement,'} [{'sub': '1', 'modifying the pH of the effluent in the vicinity of the ISFET gate terminal and non-glass reference electrode to a first known value pH;'}, {'sub': GS1', '1, 'obtaining a corresponding value Vby performing the biasing and measuring steps on the effluent at the known pH; and'}, {'sub': 0', 'GS1', '1, 'calibrating the probe by modifying an intercept point Ein the calibration curve, using the values Vand pH.'}], 'periodically, while obtaining measurements of the effluent pH, performing an in situ calibration of the probe, by'}8. The method of wherein the calibration curve is of the form{'br': None, 'i': V', '=C', 'E, 'sub': GS', '2', '0, '·pH+, where'}{'sub': 'GS', 'Vis the gate-source voltage of the ISFET obtained in the measuring step;'}{'sub': '2', 'Cis a predetermined value representing the slope of the curve;'}pH is the pH of the effluent; and{'sub': '0', 'Eis a predetermined value representing the intercept ...

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Номер записи: 18
03-02-2022 дата публикации

CHEMICAL ACTUATORS

Номер: US20220032259A1
Автор: EVANS Parker, Northcutt Robert, SUNDARESAN Vishnu Baba
Принадлежит:

Disclosed herein are chemical actuators and ionic motive force transducers. The actuators and transducers are capable of converting an electrical stimulus into an ionic gradient within a reaction volume. 125-. (canceled)26. An ionic motive force transducer , comprising a chamber defining a volume;a working electrode disposed on one side of the chamber,a counter electrode disposed opposite the working electrode, anda reference electrode;wherein the working electrode comprises a doped, conductive polymer in communication with a conductive substrate.27. The transducer according to claim 26 , wherein the working electrode and counter electrode are in electrical communication with a processor.28. The transducer according to claim 27 , wherein the processor is configured to provide an electrical stimulus to the conductive substrate.29. The transducer according to claim 26 , wherein the chamber defines a dish.30. The transducer according to claim 29 , wherein the dish comprises a base and at least one side wall.31. The transducer according to claim 30 , wherein the dish comprises a base and a cylindrical side wall.32. The transducer according to claim 30 , wherein the dish comprises a base and a plurality of straight side walls.33. The transducer according to claim 26 , wherein the chamber defines a channel.34. The transducer according to claim 26 , wherein the conductive polymer comprises a poly(pyrrole) claim 26 , poly(acetylene) claim 26 , poly(aniline) claim 26 , poly(p-phenylene vinylene) claim 26 , poly(fluorene) claim 26 , poly(phenylene) claim 26 , poly(pyrene) claim 26 , poly(azulene) claim 26 , poly(naphthalene) claim 26 , poly(carbazole) claim 26 , poly(indole) claim 26 , poly(azepine) claim 26 , poly(thiophene) poly(p-phenylene sulfide) claim 26 , poly(furan) claim 26 , or a copolymer thereof.35. The transducer according to claim 26 , wherein the conductive polymer comprises a poly(pyrrole).36. The transducer according to claim 26 , wherein the conductive ...

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Номер записи: 19
17-01-2019 дата публикации

PRODUCTION OF FLUORINE-CONTAINING COMPOUNDS WITH THE AID OF AN ELECTROCHEMICAL MEASURING CHAIN

Номер: US20190016604A1
Автор: Becker Andreas, KOHNKE Hans-Joachim, Lacroix Marc, Pernice Holger
Принадлежит:

The present invention relates to processes for producing fluorine-containing compounds by means of precipitation reactions from solutions containing fluoride ions wherein the pH value is determined using an electrochemical measuring chain and to electrochemical measuring chains for determining pH values. 1. A process for producing a fluorine-containing compound by a precipitation reaction , wherein the fluorine-containing compound is precipitated from a reaction medium and wherein during the course of the precipitation reaction the pH value of the reaction medium is determined using an electrochemical measuring chain.2. The process as claimed in wherein the fluorine-containing compound is selected from the group consisting of at least one alkali metal fluoride claim 1 , an alkali metal hydrogenfluoride claim 1 , an alkaline earth metal fluoride claim 1 , an alkaline earth metal hydrogenfluoride claim 1 , a transition metal fluoride claim 1 , a fluoride of an element of the third main group claim 1 , an ammonium fluoride claim 1 , an alkali metal fluoroaluminate claim 1 , an alkaline earth metal fluoroaluminate claim 1 , hydrates thereof claim 1 , HF adducts thereof and mixtures thereof.3. The process as claimed in wherein the fluorine-containing compound is selected from the group consisting of KAlF claim 1 , KAlF claim 1 , KAlF claim 1 , CsAlF claim 1 , CsAlF claim 1 , CsAlF claim 1 , LiAlF claim 1 , LiAlF claim 1 , LiAlF claim 1 , NaAlF claim 1 , NaAlF claim 1 , NaAlF claim 1 , KBF claim 1 , BaF claim 1 , KHF claim 1 , NHF claim 1 , NHF claim 1 , hydrates thereof claim 1 , HF adducts thereof and mixtures thereof.4. The process as claimed in wherein the reaction medium contains fluoride ions at commencement of the precipitation reaction and hydroxide ions are added to the reaction medium during the precipitation reaction.5. The process as claimed in wherein the reaction medium contains hydroxide ions at commencement of the precipitation reaction and fluoride ions ...

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Номер записи: 20
17-01-2019 дата публикации

System and Method for Single-Step ELISA via Local pH Modulation

Номер: US20190017954A1
Автор: Fomina Nadezda, Johnson Christopher, Lang Christoph, Shin Young Shik, Staley Patrick
Принадлежит:

A method for detecting a presence and/or a concentration of a target substance in a reagent solution using enzyme-linked immunosorbent assay (ELISA) includes binding the target substance directly or indirectly to an electrode, and binding a detection agent directly or indirectly to the bound target substance. The method further includes modulating a pH of only a portion of the reagent solution in which the bound target substance and the bound detection agent are located using the electrode, the modulated pH of the portion of the reagent solution causing the bound detection agent to undergo a change, and detecting the change in the bound detection agent. The detected change corresponds to the presence of the target substance in the reagent solution and/or the concentration of the target substance in the reagent solution. 1. A method for detecting a presence and/or a concentration of a target substance in a reagent solution using enzyme-linked immunosorbent assay (ELISA) comprising:binding the target substance directly or indirectly to an electrode;binding a detection agent directly or indirectly to the bound target substance;modulating a pH of only a portion of the reagent solution in which the bound detection agent is located using the electrode, the modulated pH of the portion of the reagent solution causing the bound detection agent to undergo a change; anddetecting the change in the bound detection agent, the detected change corresponding to the presence of the target substance in the reagent solution and/or the concentration of the target substance in the reagent solution.2. The method of claim 1 , further comprising:binding a capture agent to the electrode; andbinding the target substance directly or indirectly to the capture agent.3. The method of claim 1 , wherein the detection agent includes a pH-sensitive reporter claim 1 , the method further comprising:energizing the electrode with a direct current electrical signal for a predetermined time period to ...

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Номер записи: 21
17-01-2019 дата публикации

Method and device for monitoring and/or determining the condition of a measuring probe

Номер: US20190017961A1
Автор: Daniel Jungo
Принадлежит: Mettler Toledo Schweiz GmbH

The operation of a measuring probe used for measuring at least one property of a process material is monitored or determined while the measuring probe is in use. The measured property can be a pH measurement, or a CO 2 or oxygen concentration of the process material. The measuring probe has an electrode with a sensing element. When the sensing element is in contact with the process material, the electrode delivers a measurement signal to the measurement signal circuit, where the electrode voltage is related to the measured property. The signal-processing unit determines a measurement quantity of the measured property using the measurement signal. When a test signal is delivered by the signal source to the test signal circuit during a verification phase, a coupling element ensures galvanic isolation between the measurement signal circuit and the test signal circuit.

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Номер записи: 22
10-02-2022 дата публикации

SYSTEMS AND METHODS FOR THE PRODUCTION OF TUNABLE CONDUCTIVE MOLYBDENUM DISULFIDE THIN FILMS

Номер: US20220041463A1
Автор: Kruse Peter, Saha Dipankar, Selvaganapathy Ponnambalam Ravi
Принадлежит:

Methods of manufacturing conductive molybdenum disulfide (MoS) are described herein. The methods include mixing a molybdenum disulfide powder in a liquid to form a molybdenum disulfide suspension, sonicating the molybdenum disulfide suspension for a first period of time at a first temperature, and retrieving the conductive molybdenum disulfide from the sonicated molybdenum disulfide suspension. Methods of manufacturing conductive forms of other transition metal dichalcogenides are also described. Materials produced by the methods described herein are also described. 1. A method of manufacturing conductive molybdenum disulfide (MoS2) , the method comprising:mixing a molybdenum disulfide powder in a liquid to form a molybdenum disulfide suspension;sonicating the molybdenum disulfide suspension for a first period of time, the molybdenum disulfide solution having a first temperature; andretrieving the conductive molybdenum disulfide from the sonicated molybdenum disulfide suspension.2. The method of claim 1 , wherein the molybdenum disulfide powder is in a bulk powder form.3. The method of claim 1 , wherein the molybdenum disulfide powder comprises 2H—MoS.4. The method of claim 1 , wherein the molybdenum disulfide powder comprises exfoliated 2H—MoS.5. The method of claim 1 , wherein the liquid is an aqueous solution.6. The method of claim 1 , wherein the liquid comprises hydrogen peroxide.7. The method of claim 6 , wherein the hydrogen peroxide has a concentration less than about 1.0% (v/v) in water.8. The method of claim 7 , wherein the hydrogen peroxide has a concentration of about 0.06% (v/v) in water.9. The method of claim 1 , wherein the liquid is water and the first temperature is equal to or greater than 40 degrees Celsius.10. The method of claim 1 , wherein the first temperature is equal to or greater than 60 degrees Celsius.11. The method of further comprising claim 1 , after sonicating the molybdenum disulfide solution for a first period of time at a first ...

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Номер записи: 23
28-01-2016 дата публикации

METHODS FOR GENERATING pH/IONIC CONCENTRATION GRADIENT NEAR ELECTRODE SURFACES FOR MODULATING BIOMOLECULAR INTERACTIONS

Номер: US20160025671A1
Автор: Ahmad Habib, Fomina Nadezda, Gangadharan Rajan, Johnson Christopher, Kavusi Sam, Lau Aldrich, Verma Piyush
Принадлежит:

Device and methods for use in a biosensor comprising a multisite array of test sites, the device and methods being useful for modulating the binding interactions between a (biomolecular) probe or detection agent and an analyte of interest by modulating the pH or ionic gradient near the electrodes in such biosensor. An electrochemically active agent that is suitable for use in biological buffers for changing the pH of the biological buffers. Method for changing the pH of biological buffers using the electrochemically active agents. The methods of modulating the binding interactions provided in a biosensor, analytic methods for more accurately controlling and measuring the pH or ionic gradient near the electrodes in such biosensor, and analytic methods for more accurately measuring an analyte of interest in a biological sample. 1. A method comprising:a. adding an electrochemically active agent onto a support of a biosensor, wherein an electrode of the support is configured to cause a change in a redox state of the electrochemically active agent; andb. adding an analyte that, in dependence upon the change of the redox state, interacts with a probe on the support.2. The method of claim 1 , wherein the change of the redox state allows the interaction between the analyte and the probe to occur.3. The method of claim 1 , wherein the change of the redox state increases a binding affinity between the analyte and the probe.4. The method of claim 1 , wherein the change of the redox state decreases a binding affinity between the analyte and the probe.5. A method comprising: i. the support comprising one or more electrodes, and a biomolecule interface layer having one or more immobilized probes thereon;', 'ii. the solution comprising an electrochemically active agent;, 'a. providing a biosensor comprising a support in a solution,'}b. adding a biomolecule analyte to the solution;{'sup': +', '+, 'c. reacting the electrochemically active agent using the one or more electrodes to ...

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Номер записи: 24
26-01-2017 дата публикации

Dibasic acid sensor and method for continuously measuring dibasic acid concentration in a substance

Номер: US20170023507A1
Автор: Rikard Hakansson
Принадлежит: Alstom Technology AG, General Electric Technology GmbH

A method is provided for measuring a concentration of dibasic acid in a substance in a gas cleaning process, the method comprising the steps of sending a plurality of voltage pulses through the substance by a first electrode and a second electrode, wherein the first and second electrodes are in contact with the substance, receiving current responses generated by the plurality of voltage pulses, and analyzing the current responses using a multivariate data analysis for calculation of the concentration of dibasic acid in the substance. Also provided is a dibasic acid sensor, control unit and analysing unit for performing such a method.

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Номер записи: 25
26-01-2017 дата публикации

ELECTROPOLYMERIZATION ONTO FLEXIBLE SUBSTRATES FOR ELECTRONIC APPLICATIONS

Номер: US20170023513A1
Автор: Abruna Hector D., CONTE Sean, HERNANDEZ-BURGOS Kenneth, LI Wan, RALPH Daniel C., RITZERT Nicole, RODRIGUEZ-CALERO Gabriel G., TAN Cen
Принадлежит:

Electropolymerized polymer or copolymer films on a conducting substrate (e.g., graphene) and methods of making such films. The films may be part of multilayer structures. The films can be formed by anodic or cathodic electropolymerization of monomers. The films and structures (e.g., multilayer structures) can be used in devices such as, for example, electrochromic devices, electrical-energy storage devices, photo-voltaic devices, field-effect transistor devices, electrical devices, electronic devices, energy-generation devices, and microfluidic devices. 1. A structure comprising:a) a conducting substrate comprising a first graphene layer disposed on at least a portion of a surface of the substrate; andb) a first electropolymerized polymer layer disposed on at least a portion of the graphene layer.2. The structure of claim 1 , wherein the conducting substrate is a flexible substrate.3. The structure of claim 1 , further comprising a first electrolyte layer disposed on at least a portion of the first electropolymerized conducting polymer layer.4. The structure of claim 3 , further comprising a second graphene layer disposed on at least a portion of the first electrolyte layer.5. The structure of claim 4 , wherein a flexible transparent polymer layer is disposed on at least a portion of the second graphene layer.6. The structure of claim 4 , wherein the second graphene layer is disposed on a flexible substrate.7. The structure of claim 2 , wherein the flexible substrate comprises poly(ethylene terephthalate) (PET) claim 2 , poly-3 claim 2 ,4-ethylenedioxythiophene-polystryrenesulfonate claim 2 , polyethylene claim 2 , polypropylene claim 2 , or polystyrene.8. The structure of claim 1 , wherein the electropolymerized layer is a polythiophene claim 1 , polythiophene derivative claim 1 , polypyrrole claim 1 , polypyrole derivatives claim 1 , polyfuran claim 1 , polyfuran derivatives claim 1 , polyaniline claim 1 , polyaniline derivative claim 1 , polyphenylenediamine ...

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Номер записи: 26
29-01-2015 дата публикации

ANALYTE SENSOR

Номер: US20150027887A1
Автор: Lee Eric
Принадлежит:

Matrix materials such polymers derivatives to contain a redox active material can be used to form electrodes and probes suitable for use in pH meters and other analyte sensing devices. 1. A voltammetric sensor capable of communicating with a mobile or remote computing device , said sensor comprising: a working electrode , a reference electrode , a counter electrode , firmware and electronics for voltammetry and signal processing with optional local display and control , and a communications interface.2. The sensor of linked by a wire or by wireless communications to the mobile or remote computing device claim 1 , which mobile or remote computing device comprises a communications interface compatible with that of the sensor and software for display or recordation of pH (or other analyte concentration).3. The sensor of in the form of a self-contained claim 1 , optionally hand-held instrument.4. The sensor of comprising an optionally detachable cartridge housing a working electrode claim 3 , a reference electrode claim 3 , and a counter electrode claim 3 , and a head unit housing the electronic circuitry claim 3 , a display claim 3 , and means to control the operation of the sensor.5. The sensor of claim 1 , further comprising a mobile or remote computing device comprising a communications interface claim 1 , display claim 1 , input devices claim 1 , and an application software program with a graphical user interface.6. The sensor of claim 1 , further comprising a voltammetric sensor for use with a conventional pH meter as a universal replacement of a glass probe claim 1 , said sensor comprising an emulator that converts an electronic signal output representing a pH value measured by the voltammetric sensor into a corresponding potential that a conventional pH meter can accept claim 1 , process claim 1 , and display of the same pH value.7. (canceled)8. (canceled)9. (canceled)10. An analyte-insensitive electrode (AIE) comprising:(i) a pseudo-reference electrode;(ii) an ...

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Номер записи: 27
04-02-2021 дата публикации

Method for determining a chemical intake capacity of a process medium in a measuring point and measuring point for determining a chemical intake capacity of a process medium

Номер: US20210033590A1
Автор: Erik Hennings, Michael Hanko
Принадлежит: Endress and Hauser Conducta GmbH and Co KG

A method for determining a chemical intake capacity of a process medium includes steps of providing a measuring point and an analytical measuring device, closing an outlet valve to the drain so that no process medium is discharged and closing the inlet valve so that no additional process medium is fed from the first inlet. The method includes circulating the analyte and process medium through the pump so the mixture flows into the analytical measuring device at a predetermined flow velocity. Further, the method includes detecting a measured value using the analytical measuring device until the measured value exceeds a limit value. The predetermined volumes are summed to form a total volume of the analyte, and a chemical intake capacity of the predetermined medium is determined based on the total volume of the analyte fed in.

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Номер записи: 28
24-02-2022 дата публикации

PORTABLE DEVICE AND SYSTEM FOR RAPID DETECTION OF A BACTERIAL CELL IN FLUID SAMPLES

Номер: US20220057359A1
Автор: SHAIBANI Parmiss Mojir, SOHRABI Amirreza
Принадлежит:

A system for rapid analysis of a fluid sample for detection of at least one viable microbial organism therein. The system comprises a cartridge that is demountably engageable with a reader component. The cartridge has a first well receiving a fluid sample, with a second well and third well imbedded under portions of the first well. The second well has a sensor configured to send a reference signal to the reader component, while the third well has a sensor configured to send a sample signal to the reader component. When in use, the cartridge is engaged with the reader component and a fluid sample is placed into the first well. The reader component controllably illuminates the third well and comprises a detector that detects differences in photocurrent and/or spectra between the reference signal and the sample signal from the illuminated third well. 1. A system for rapid analysis of a fluid sample for detection of at least one viable microbial organism therein , the system comprising: an illumination supply in communication with a port extending to a selected target site on the outer casing,', 'circuitry for controlling the illumination supply,', 'a potentiostat;', 'circuitry interconnecting the potentiostat with one or more receptacles;', 'a detector configured for detecting one or more differences in photocurrent outputs between a reference source and a sample source;', 'wherein said reader component is configured for electronic communication with a microprocessor for modulation of the circuitry for controlling the illumination supply and for modulation of the potentiostat; and, 'a reader component comprising a housing containing therein a first well extending downward from an upper surface of the casing, said first well configured for receiving a fluid sample therein,', a third well imbedded in the casing underneath a second portion of the first well, said third well having a light-addressable potentiometric sensor with an upper surface having a layer of ...

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Номер записи: 29
18-02-2016 дата публикации

METAL-OXIDE-SEMICONDUCTOR CAPACITOR BASED SENSOR

Номер: US20160045144A1
Автор: Bansal Aditya, Jagtiani Ashish V., Zafar Sufi
Принадлежит:

A glucose sensor comprises a conducting back electrode. The glucose sensor also comprises a silicon substrate in electrical contact with the conducting back electrode. The glucose sensor also comprises a dielectric layer disposed on the silicon substrate. The glucose sensor also comprises a pH sensing layer disposed on the dielectric layer. The glucose sensor also comprises a chemical layer disposed on the pH sensing layer, wherein the chemical layer is in contact with an aqueous solution. The glucose sensor also comprises a conductive electrode disposed on the dielectric layer, where in the conductive electrode is in contact with the aqueous solution. 1. A glucose sensor , comprising:a conducting back electrode;a silicon substrate in electrical contact with the conducting back electrode;a dielectric layer disposed on the silicon substrate;a pH sensing layer disposed on the dielectric layer;a chemical layer disposed on the pH sensing layer, wherein the chemical layer is in contact with an aqueous solution; anda conductive electrode disposed on the dielectric layer, where in the conductive electrode is in contact with the aqueous solution.2. The glucose sensor of claim 1 , wherein a sensing signal voltage between the conducting back electrode and the conductive electrode varies based on a pH change on the pH sensing layer.3. The glucose sensor of claim 1 , wherein the pH sensing layer comprises hafnium oxide (HfO).4. The glucose sensor of claim 1 , wherein the pH sensing layer comprises one or more of the following: hafnium silicate (HfSiO); Hf silicon oxynitride (HfSiON); ZrO; or AlO.5. The glucose sensor of claim 1 , wherein the chemical layer comprises glucose oxidase.6. The glucose sensor of claim 1 , wherein the aqueous solution is a tear.7. The glucose sensor of claim 5 , wherein the glucose oxidase causes glucose to react with Omolecules to change a concentration of H ions in the aqueous solution.8. The glucose sensor of claim 2 , wherein the pH change on the ...

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Номер записи: 30
06-02-2020 дата публикации

BIOSENSORS WITH pH-INDEPENDENT REDOX MOIETIES

Номер: US20200041437A1
Автор: Bertrand Jacob A., Brothers Michael, Hanley Brian
Принадлежит: Eccrine Systems, Inc.

An electrochemical sensor is provided for use in a wearable device for measuring analytes in a pH-variable biofluid. The sensor includes a plurality of aptamer sensing elements which have biorecognition elements, such as aptamers, that experience a conformational change on interaction with a target analyte in the biofluid. Each aptamer sensing element forms a first configuration before target analyte capture and a second configuration after target analyte capture. A redox moiety is paired with each aptamer sensing element. The redox moiety has a reaction potential that is at least partially independent of a pH value of the biofluid. The EAB sensor further includes an electrode operative in conjunction with the plurality of aptamer sensing elements to produce a variable signal depending upon the configuration of the aptamer sensing elements. 1. A device , comprising:a plurality of redox moieties, each having a reaction potential that is at least partially independent of a potential of hydrogen (pH) value of a biofluid sample;an electrode; anda plurality of analyte capture complexes functionalized on a surface of the electrode, wherein each complex is paired with a redox moiety, and wherein the complex undergoes a conformation change upon an interaction with a target analyte in the biofluid sample, and wherein the complex forms a first configuration relative to the electrode before the interaction and a second configuration relative to the electrode after the interaction, the conformation change producing a detectable signal change from the redox moiety upon an electronic interrogation of the electrode.2. The device of claim 1 , wherein the redox moiety undergoes an electron transfer reaction.3. The device of claim 1 , wherein the redox moiety has a reaction potential in the range of 0.2 through 0.8 volts.4. The device of claim 1 , wherein the redox moiety is selected from the group of compounds consisting of the following: a methyl viologen; a hexyl methyl viologen; ...

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Номер записи: 31
26-02-2015 дата публикации

PASSIVE WIRELESS SENSOR

Номер: US20150053575A1
Автор: Bhadra Sharmistha, Bridges Greg E., Freund Michael, Thomson Douglas L.
Принадлежит:

Systems, devices, and/or methods for use in passive wireless transmission of one or more parameters such as, e.g., pH, temperature, etc. are described. The systems, devices, and/or methods may use a passive sensor located proximate a material and an interrogator that may be used to interrogate the passive sensor and to receive a signal from the passive sensor representative of the one or more parameters. 1. A system for use in wireless transmission of a parameter , wherein the system comprises: a sensing portion configured to be used to measure a parameter of the material, wherein at least a portion of the sensing portion is exposable to the material, and', 'a circuit portion electrically coupled to the sensing portion, wherein the circuit portion is configured to measure the parameter using the sensing portion and to measure a temperature proximate the sensing portion, wherein the circuit portion is further configured to wirelessly transmit a signal representative of the measured parameter and the measured temperature when energized; and, 'a passive sensor device locatable proximate a material, wherein the passive sensor device comprises a resonant circuit, wherein the resonant circuit comprisesan interrogator portion locatable proximate the passive sensor device, wherein the interrogator portion comprises interrogating circuitry configured to wirelessly transmit energy to the circuit portion of the resonant circuit of the passive sensor device and to wirelessly receive the signal representative of the measured parameter and the measured temperature from the circuit portion of the resonant circuit of the passive sensor device, wherein the interrogating circuitry is further configured to generate a temperature-compensated value of the parameter based on the received signal.24-. (canceled)5. The system of claim 1 , wherein the sensing portion comprises:a first electrode exposable to the material, anda second electrode exposable to the material,wherein the circuit ...

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Номер записи: 32
26-02-2015 дата публикации

Measuring Arrangement

Номер: US20150053576A1
Автор: Michael Hanko, Thomas Wilhelm, Torsten Pechstein
Принадлежит: Endress and Hauser Conducta Gesellschaft fuer Mess und Regeltechnik mbH and Co KG

A measuring arrangement, comprising: at least three half-cells, each of which has a pH-sensitive membrane, and a measuring circuit, which is embodied to register a half-cell potential of each half-cell relative to a shared reference potential. The half-cell potential of each half-cell depends on the pH-value of a measured liquid contacting its pH-sensitive membrane. The sensitivity of a first of the three half-cells corresponds to a change of its half-cell potential relative to a change of the pH-value of the measured liquid causing it; the sensitivity of a second of the three half-cells corresponds to a change of its half-cell potential relative to a change of the pH-value of the measured liquid causing it; the sensitivity of a third of the three half-cells corresponds to a change of its half-cell potential relative to a change of the pH-value of the measured liquid causing it.

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Номер записи: 33
13-02-2020 дата публикации

CONVEYOR SYSTEMS AND METHODS

Номер: US20200048012A1
Автор: Andreoli Andrea, GABOR Philip Michael, Menke Cornelis Hendrik Mijndert, Stefanko Justin Michael
Принадлежит:

Embodiments of the invention provide systems and methods for monitoring and removing contaminants from a conveyor surface based upon predicted frictional engagement qualities detected on a conveyor surface. In some examples, the methods may include monitoring the conveyor surface with at least one sensor configured to sense a condition on the conveyor surface. The sensor may detect the presence of a contaminant, and communicate the location of the detected contaminant to a processor. A treatment cycle may then be initiated to remove or displace the contaminant from the conveyor surface after the presence of a contaminant has been detected. 1. A method of monitoring and treating contaminants on a conveyor surface , the method comprising:monitoring the conveyor surface with at least one sensor configured to sense a condition on the conveyor surface;detecting the presence of a contaminant on the conveyor surface with the sensor;communicating the presence of the contaminant to a processor; andinitiating a treatment cycle to treat the condition on the conveyor surface after the presence of the contaminant on the conveyor surface has been detected.2. The method of claim 1 , wherein at least one sensor is a pH sensor and the sensor is configured to monitor the pH on the conveyor surface.3. The method of claim 2 , wherein when the pH sensor detects a decrease in pH on the conveyor surface claim 2 , the pH sensor communicates the location of the detected decrease in pH to the processor.4. The method of claim 1 , wherein the method further comprises the step of terminating the treatment cycle when the sensor detects an acceptable level of the contaminant present on the conveyor surface.5. The method of claim 4 , wherein the method further comprises initiating a drying cycle after the treatment cycle has been terminated.6. The method of claim 1 , wherein the contaminant is a liquid and the treatment cycle removes the liquid prior to the liquid evaporating from the conveyor ...

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Номер записи: 34
14-02-2019 дата публикации

ION SENSOR, ION CONCENTRATION MEASUREMENT METHOD, AND ELECTRONIC COMPONENT

Номер: US20190049401A1
Автор: Binti Mohd Sukri Shaili Falina, IGARASHI Keisuke, Inaba Masafumi, Kawarada Hiroshi, Naramura Takuro, Ogawa Kotaro, Shintani Yukihiro
Принадлежит:

An electronic component includes a field effect transistor that functions as a working electrode of an ion sensor and a driving circuit that causes a potential difference between a source electrode and a drain electrode of the field effect transistor. A reference electrode potential of the field effect transistor is fixed. 1. An electronic component comprising:a field effect transistor that functions as a working electrode of an ion sensor; anda driving circuit that causes a potential difference between a source electrode and a drain electrode of the field effect transistor,wherein a reference electrode potential of the field effect transistor is fixed.2. The electronic component according to claim 1 , whereinthe field effect transistor has a diamond thin film disposed on one of main surfaces of a substrate of the field effect transistor, andthe source electrode and the drain electrode are disposed formed on the diamond thin film.3. The electronic component according to claim 1 , further comprising:a conductive diamond electrode,wherein the reference electrode potential is fixed by the conductive diamond electrode.4. The electronic component according to claim 1 , wherein a surface of the diamond electrode is fluorine-terminated.5. The electronic component according to claim 1 , wherein the field effect transistor is an Ion-Sensitive Field-Effect Transistor.6. An ion sensor for measuring ion concentration of a measurement target liquid claim 1 , based on an output from a reference electrode and a working electrode claim 1 , comprising:a field effect transistor that functions as the working electrode;a metal container that contains the field effect transistor and the measurement target liquid, wherein the metal container is fixed at a predetermined potential and functions as the reference electrode; anda driving circuit that causes a potential difference between a source electrode and a drain electrode of the field effect transistor.7. The ion sensor according to ...

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Номер записи: 35
14-02-2019 дата публикации

METHOD FOR PRODUCING AN ISE HALF-CELL, ISE HALF-CELL, SENSOR, AND MULTI-PARAMETER SENSOR

Номер: US20190049402A1
Автор: Hennings Erik, Petzold Holm, Vettermann Jens
Принадлежит:

The present disclosure discloses a method for producing an ISE half-cell, including the steps of: immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore; removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution, whereby an ion-selective membrane is created at the immersed end of the hollow body; and completing the hollow body to make an ISE half-cell. The present disclosure also discloses an ISE half-cell that is produced according to such a method. The present disclosure further discloses a sensor and a multiparameter sensor comprising several such ISE half-cells. 1. A method for producing an ISE half-cell , including the steps of:immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore;removing the hollow body from the membrane solution;drying the hollow body and evaporating the solvent from the membrane solution, whereby an ion-selective membrane is created at the first end of the hollow body, andcompleting the hollow body to make an ISE half-cell.2. The method according to claim 1 , wherein the steps of immersing and drying are executed multiple times.3. The method according to claim 1 , wherein the membrane solution comprises a polymer solution.4. The method according to claim 1 , further including a step of:performing a microscopic surface modification on the hollow body.5. The method according to claim 1 , further including a step of:immersing the hollow body with the membrane into an additional solution in order to apply a functional layer, an anti-fouling layer, or a layer with a low wetting capability of the surface.6. The method according to claim 5 , further including a step of:introducing a metallic support structure onto or into the ion-selective membrane.7. The method according to claim 1 , further including a step of:applying an ...

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Номер записи: 36
25-02-2021 дата публикации

METHOD OF MANUFACTURING A SENSOR ELEMENT AND ION-SELECTIVE ELECTRODE

Номер: US20210055253A1
Автор: Speck Matthäus, Wilhelm Thomas
Принадлежит:

The present disclosure relates to a method of manufacturing a sensor element for measuring a measurand that is dependent on an ion activity in a measuring fluid, comprising: joining a carrier body comprising a base body made of a liquid-impermeable, electrically insulating ceramic material, wherein the base body has at least one through-opening that is introduced, especially in at least one defined location of the base body, to a sensor element body formed of an ion-selective, especially pH-selective, glass such that a surface of the carrier body contacts the sensor element body and is integrally joined to the sensor element body at least at individual fixation points, especially across the entire surface thereof. 1. A method of manufacturing a sensor element for measuring a measurand that is dependent on an ion activity in a measuring fluid , the method comprising:joining a carrier body comprising a base body, which defines a cavity, to a sensor element body, wherein the base body comprises a liquid-impermeable, electrically insulating ceramic material and includes at least one through-opening to the cavity, andwherein the sensor element body comprises an ion-selective glass such that a surface of the carrier body contacts the sensor element body and is integrally joined to the sensor element body at least at individual fixation points.2. The method of claim 1 , further comprising electrically contacting the sensor element body via the at least one through-opening of the base body.3. The method of claim 1 , wherein the surface of the carrier body includes at least one electrically conductive partial surface claim 1 , and wherein the carrier body and the sensor element body are integrally joined to one another such that the electrically conductive partial surface is at least partially covered by the sensor element body.4. The method of claim 3 , further comprising electrically contacting the electrically conductive partial surface via the at least one through- ...

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Номер записи: 37
03-03-2016 дата публикации

PORTABLE DEVICE FOR ANALYSING pH OR ANOTHER VARIABLE BY ELECTROCHEMICAL MEASUREMENT

Номер: US20160061813A1
Автор: Costa-Bauza Antonia, Gomila Muñoz Isabel, Grases Freixedas Feliciano, Henríquez Peláez Ruben, Isern Amengual Bernat, Martín Becerra Eva, PERELLO BESTARD Joan, Prieto Almirall Rafael M.
Принадлежит:

Portable device () for analysing pH or another variable by electrochemical measurement comprising a sensor (), a microprocessor () and display means () for the results of the analysis. The portable device makes it possible to carry out pre-diagnoses quickly and easily without the need for specialist staff. 120-. (canceled)21. A method for self-diagnosis of lithiasis in a subject in need thereof comprising:(i) contacting a urine sample obtained from said subject with a portable device comprising an electrochemical sensor; and,(ii) measuring pH and/or ionic calcium in said urine sample using the electrochemical sensor in said portable device, thereby providing a measurement value of pH and/or ionic calcium;wherein a measurement of pH and/or ionic calcium above or below at least one threshold value is indicative of lithiasis or risk of lithiasis.22. The method according to claim 21 , wherein the electrochemical sensor is mounted on a lid affixable to a specimen collection cup.23. The method according to claim 21 , wherein the electrochemical sensor comprises a pH sensor claim 21 , a calcium sensor claim 21 , or a combination thereof.24. The method according to claim 21 , wherein the electrochemical sensor further comprises a redox potential sensor claim 21 , and the variable indicative of lithiasis or risk of lithiasis further comprises redox potential.25. The method according to claim 21 , wherein the lithiasis is uric acid lithiasis claim 21 , hydroxyapatite lithiasis claim 21 , oxalocalcium lithiasis claim 21 , or a combination thereof.26. The method according to claim 21 , wherein the method comprises one threshold value.27. The method according to claim 21 , wherein the method comprises two threshold values.28. The method according to claim 27 , wherein the two threshold values correspond to pH.29. The method according to claim 27 , wherein one threshold value corresponds to pH and an one threshold value corresponds to ionic calcium.30. The method according to ...

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Номер записи: 38
01-03-2018 дата публикации

VISUALIZER, MEASUREMENT SYSTEM, AND MEASUREMENT METHOD

Номер: US20180058841A1
Автор: WAKITA Naohide
Принадлежит:

A state visualizer according to one aspect of the present disclosure includes an optical member including a fixed part that has a fixed relative positional relationship with an object to be measured and a movable part that is movably supported by the fixed part and keeps a constant angle with respect to a gravity direction, the optical member retroreflecting a light or an electromagnetic wave in a case where the fixed part and the movable part are in a predetermined positional relationship. The optical member changes an intensity of the light or the electromagnetic wave reflected in a retroreflection direction in accordance with a change of a relative positional relationship between the fixed part and the movable part. 1. A visualizer , comprising:an optical member including a fixed part that has a fixed relative positional relationship with an object to be measured and a movable part that is movably supported by the fixed part and keeps a constant angle with respect to a gravity direction, the optical member retroreflecting a light or an electromagnetic wave in a case where the fixed part and the movable part are in a predetermined positional relationship, whereinthe optical member changes an intensity of the light or the electromagnetic wave reflected in a retroreflection direction in accordance with a change of a relative positional relationship between the fixed part and the movable part.2. The visualizer according to claim 1 , whereinthe optical member includes a first mirror having a first mirror surface, a second mirror having a second mirror surface, and a third mirror having a third mirror surface, the first mirror surface, the second mirror surface, and the third mirror surface intersecting and facing one another;the first mirror is included in the fixed part,the second mirror is included in the movable part and is supported by the fixed part so that the second mirror surface keeps a constant angle with respect to the gravity direction; andthe optical ...

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Номер записи: 39
02-03-2017 дата публикации

SINGLE-USE pH SENSOR STORAGE SOLUTION

Номер: US20170059518A1
Автор: Feng Chang-Dong, NGUYEN HOANG MINH
Принадлежит:

A pH sensor for a single-use bioreactor is provided. The sensor includes a pH sensing electrode, a reference system, a storage compartment, and an access mechanism. The reference system includes a reference electrolyte, a reference electrode disposed in the reference electrolyte, and a reference junction. The storage compartment contains a storage solution that is configured to contact the pH sensing electrode within the storage compartment. The access mechanism is configured to, when actuated, couple the pH sensing electrode to an interior of the single-use bio-reactor. The storage solution includes a buffer solution that is compatible with the reference electrolyte. 1. A pH sensor for a single-use bioreactor , the sensor comprising:a pH sensing electrode;a reference system including a reference electrolyte, a reference electrode disposed in the reference electrolyte, and a reference junction;a storage compartment containing a storage solution, wherein the storage solution is configured to contact the pH sensing electrode within the storage compartment;an access mechanism configured to, when actuated, couple the pH sensing electrode to an interior of the single-use bioreactor; andwherein the storage solution comprises a buffer solution that is compatible with the reference electrolyte.2. The pH sensor of claim 1 , wherein the reference system is a a silver/silver-chloride reference system and wherein the reference electrolyte is potassium chloride.3. The pH sensor of claim 1 , wherein the storage solution comprises a phosphate-based buffer solution.4. The pH sensor of claim 1 , wherein the storage solution comprises a carbonate-based buffer solution.5010. The pH sensor of claim 1 , wherein the storage solution comprises a substantially . molar potassium chloride solution.6. The pH sensor of claim 1 , wherein the storage solution has a known pH to calibrate the pH sensor prior to actuation of the access mechanism.7. A pH sensor comprising:a sensing electrode ...

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Номер записи: 40
27-02-2020 дата публикации

ELECTROCHEMICAL SENSOR

Номер: US20200064306A1
Автор: LIMON PETERSEN Juan, Rutz Andreas
Принадлежит:

An electrochemical sensor () has a sensor element () with a measuring surface () that faces a measuring medium () during use. The sensor element has a planar measuring element (). A sensor shaft () has an aperture () with a bezel () at an end which, during use, faces the measuring medium. The sensor element is installed in the area of the aperture. The electrochemical sensor also has an annular sealing element (), which is arranged between the sensor element and the bezel. An insulator element () is firmly and inseparably connected to the measuring element, exposing or recessing the measuring surface. Thus, the sealing element, which protects the electrochemical sensor against the ingress of measuring medium, is arranged sealingly between the insulator element and the bezel. 1. An electrochemical sensor , comprising:a sensor element with a measuring element and a measuring surface that faces a measuring medium during use;a sensor shaft having an end that faces the measuring medium during use, the sensor shaft comprising an aperture with a bezel, with the sensor element is installed in the area of the aperture;an annular sealing element arranged between the sensor element and the bezel; andan insulator element, firmly and inseparably connected with the measuring element while exposing the measuring surface, with the annular sealing element, which protects the electrochemical sensor against the ingress of measuring medium, is sealingly arranged between the insulator element and the bezel.2. The electrochemical sensor of claim 1 , wherein the measuring element comprises a flat claim 1 , planar disc of electrochemically active pH glass.3. The electrochemical sensor of claim 1 , wherein the measuring element comprises a flat claim 1 , planar layer or layer structure comprising electrochemically active pH glass.4. The electrochemical sensor of claim 1 , wherein the insulator element comprises a thermally and chemically resistant insulator glass claim 1 , the thermal ...

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Номер записи: 41
27-02-2020 дата публикации

pH METER

Номер: US20200064307A1
Автор: Eric Lee, Steve Roth, Thang Huy Vu
Принадлежит: Parker Hannifin Corp

Voltammetric sensors prepared from composite materials and optionally using microfabrication techniques enable detection of analyte in sample volumes under ten microliters.

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Номер записи: 42
11-03-2021 дата публикации

Sensor device for the parallel determination of a concentration of small molecule substances and of a ph value

Номер: US20210072182A1
Автор: Günter Fafilek, Johannes Osterreicher, Martin Joksch, Stefan Wibihal
Принадлежит: Atspiro Aps, SIEMENS AG, TECHNISCHE UNIVERSITAET WIEN

Disclosed is a sensor device ( 100 ) for the parallel determination of a concentration of small molecule substances (e.g. ethanol, glucose, etc.) and of a pH value in a solution during the course of a biotechnological process using what is known as cyclic voltammetry. Said sensor device is constructed in the form of a rod electrode. The sensor device consists at least of two rod-shaped working electrodes ( 102, 103 ), for which different conductive materials are selected in such a way that distinguishable voltage/current profiles can be determined for the small molecule substances to be determined, and of a rod-shaped reference electrode ( 104 ). The working electrodes and the reference electrode are each embedded or melted in a tubular, insulating material. Furthermore, the sensor device comprises a counter electrode ( 105 ) in the form of a hollow cylinder, within which the working electrodes and the reference electrode are mounted. In addition, the sensor device has a sensor head part ( 101 ), which comprises at least one electronic component ( 107 ) for providing desired voltage profiles for cyclic voltammetry and for signal amplification, an analysis unit ( 108 ) for control and evaluation, and an interface ( 109 ) for data transmission.

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Номер записи: 43
14-03-2019 дата публикации

Micro-Nano Textured Graphene-Based Bionic PH Sensor and Preparation Method Therefor

Номер: US20190079042A1
Автор: CUI Shoujuan, GENG Miaomiao, LI Pingping, XU KUN, ZHANG Shiqing, Zhang Xiliang
Принадлежит:

A micro-nano textured graphene-based bionic pH sensor and a preparation method therefor. The micro-nano textured graphene-based bionic pH sensor comprises a substrate (), a working electrode (), a reference electrode (), a copper contact A (), a copper contact B (), an inner lead A (), and an inner lead B (). A groove A () and a groove B () are formed in the substrate (). The working electrode () is located in the groove A (), and the reference electrode () is located in the groove B (). The bottom of the working electrode () is connected to the inner lead A () by means of the copper contact A (). The top of the reference electrode () is connected to the inner lead B () by means of the copper contact B (). The working electrode () comprises a graphene group A () and a sensitive electrode material layer (). The sensitive electrode material layer () is located on the upper layer of the graphene group A (). The reference electrode () comprises a graphene group B () and a metal material silver layer (). The metal material silver layer () is located on the lower layer of the graphene group B (). Microgrooves or micro pits are formed in the upper surface of the sensitive electrode material layer () and the lower surface of the metal material silver layer (). The pH sensor can fast adsorb water in soil and a culture medium and then adsorb hydrogen ions, and pH in-situ measurement of the soil, the culture medium and other heterogeneous systems is implemented. 1. A biomimetic graphene-based pH sensor with micro/nano texturing surface , wherein , the pH sensor consists of substrate , slot A , slot B , working electrode , reference electrode , copper contact A , copper contact B , inner lead A , and inner lead B; the upper and lower surfaces of the substrate are respectively provided with a slot A and a slot B; the working electrode and reference electrode are located in the slot A and slot B respectively; the bottom of the working electrode is connected with the inner lead A ...

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Номер записи: 44
14-03-2019 дата публикации

PH SENSING TECHNIQUE BASED ON GRAPHENE ELECTRODES

Номер: US20190079043A1
Автор: Johnson, JR. Alan T., Ping Jinglei
Принадлежит:

Provided are devices and methods for a rapid, non-perturbative and energy-efficient technique for pH sensing based on a flexible graphene electrode. This technique does not require the application of gate voltage or source-drain bias, and demonstrates fast pH-characterization with precision. The disclosed technology is suitable for in vivo monitoring of tumor-induced pH variation in tissues and detection of pH changes as required in a DNA sequencing system. 1. A sensor device , comprising:a substrate layer;the substrate being at least partially surmounted by a conductive contact;a graphene electrode in electronic communication with the conductive contact; and 'the amount of passivation material having a window formed therein so as to expose a sensing portion of the graphene electrode to the environment exterior to the sensor device.', 'an amount of passivation material being disposed atop the graphene electrode,'}2. The sensor device of claim 1 , wherein the substrate layer comprises a polymer.3. The sensor device of claim 2 , wherein the polymer comprises polyimide.4. The sensor device of claim 1 , wherein the substrate layer comprises a thickness in the range of from about 1 micrometer to about 1 cm.5. The sensor device claim 1 , wherein the graphene electrode comprises single-layer graphene.6. The sensor device of claim 1 , wherein the graphene electrode comprises a cross-sectional dimension in the range of from 10 micrometers to 10 claim 1 ,000 micrometers.7. The sensor device of claim 1 , wherein the passivation material is characterized as being an electrical insulator.8. The sensor device of claim 1 , wherein the passivation material is characterized as being a photoresist.9. (canceled)10. The sensor device of claim 1 , wherein the window has a cross-sectional dimension in the range of from about 1 micrometer to about 10 claim 1 ,000 micrometers.11. The sensor device of claim 1 , further comprising a processing train configured to measure Faradaic charge ...

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Номер записи: 45
31-03-2022 дата публикации

ELECTRODE AND APPLICATION THEREOF

Номер: US20220099619A1
Автор: CHAN SHih-Chi, GU CHIEN-YU, WANG Yu-Min
Принадлежит:

An electrode which can measure a pH value of a buffer in an electrophoresis process and can realize an electrical connection between the electrophoresis detection device and a power supply is disclosed. The pH value of a buffer can range from 7 to 9. The electrode includes a metal. The metal wire is made of a conductive metal selected from a group consisting of titanium (Ti), platinum (Pt), titanium (Ti)/iridium (Ir) oxide, stainless steel, and any combination thereof. A pH measuring device including the electrode, and an electrophoresis detection system including the pH measuring device and an electrophoresis detection device are also disclosed. The electrode is made of metal wire, which has simple structure and good flexibility, being bendable according to actual need. 1. An electrode , comprising:a metal wire;wherein the metal wire is made of a conductive metal selected from a group consisting of titanium (Ti), platinum (Pt), titanium (Ti)/iridium (Ir) oxide, stainless steel, and any combination thereof, the electrode is configured to measure a pH value of a buffer in an electrophoresis detection device ranged from 7 to 9, the electrode is further configured to electrically connect the electrophoresis detection device to a power supply.2. The electrode of claim 1 , wherein the metal wire is made of stainless steel.3. The electrode of claim 1 , wherein a diameter of the electrode ranges from 0.2 mm to 1.0 mm.4. The electrode of claim 3 , wherein the diameter of the electrode is selected from a group consisting of 0.25 mm claim 3 , 0.3 mm claim 3 , 0.48 mm claim 3 , 0.5 mm claim 3 , and 0.8 mm.5. The electrode of claim 1 , further comprising a surface treatment layer on the metal wire.6. The electrode of claim 5 , wherein the surface treatment layer is made of a metal selected from a group consisting of zinc (Zn) claim 5 , tin (Sn) claim 5 , nickel (Ni) claim 5 , chromium (Cr) claim 5 , and any combination thereof.7. A pH measuring device claim 5 , comprising:a ...

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Номер записи: 46
12-03-2020 дата публикации

pH SENSING METHOD BASED UPON THE POTENTIAL DIFFERENCE BETWEEN TWO ELECTROCHEMICAL WAVES

Номер: US20200080964A1
Автор: Christopher Johnson, Murat Deliomeroglu, Nadezda Fomina, Patrick Staley, Young Shik Shin
Принадлежит: ROBERT BOSCH GMBH

A sensor and a corresponding method measure the pH of a solution without using an external reference electrode. The pH sensor has at least one functionalized electrode with an attached first redox active molecule and an attached second redox active molecule that are differently sensitive to pH and oxidize/reduce at different voltages, and a difference in peaks of a response of the two molecules to applied electrical parameter is measured and correlated to a particular pH.

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Номер записи: 47
25-03-2021 дата публикации

SYSTEM COMPRISING PH/ORP ELECTRODES WITH IMPROVED ANTI-POISONING CHARACTERISTICS

Номер: US20210088466A1
Автор: Carr Benjamin, KNIGHT Kenton
Принадлежит:

A reference electrode system for a pH-sensor system includes: a first junction having a membrane with a sealed side; a reference electrode, the reference electrode and/or an electrically conducting wire of the reference electrode being covered completely except for an end portion of the reference electrode, by a sleeve; and a tube that is arranged, at least partly, around the reference electrode, the electrically conducting wire, and the sleeve, the tube having a closed end which is arranged near the end portion of the reference electrode. 1. A reference electrode system for a pH-sensor system , the reference electrode system comprising:a first junction comprising a membrane with a sealed side;a reference electrode, wherein the reference electrode and/or an electrically conducting wire of the reference electrode is covered completely except for an end portion of the reference electrode, by a sleeve; anda tube that is arranged, at least partly, around the reference electrode, the electrically conducting wire, and the sleeve, the tube having a closed end which is arranged near the end portion of the reference electrode.2. The reference electrode system of claim 1 , further comprising:at least one second junction comprising a connecting element that is, at least partly, surrounded by a rubber material,wherein the at least one second junction is arranged between the first junction and the reference electrode.3. The reference electrode system of claim 2 , wherein claim 2 , when the reference electrode system comprises a plurality of second junctions claim 2 , connecting elements thereof are arranged so as to be vertically displaced.4. The reference electrode system of claim 3 , wherein each connecting element comprises wood and/or is a wooden dowel.5. The reference electrode system of claim 2 , wherein the rubber material comprises a fluorocarbon-based synthetic rubber or FKM.6. The reference electrode system of claim 1 , wherein the membrane comprises ...

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Номер записи: 48
19-03-2020 дата публикации

PH MEASURING DEVICE AND PH MONITORING SYSTEM INCLUDING SAME

Номер: US20200085364A1
Автор: KIM Eung Bo, Park Jung Ho
Принадлежит:

A pH measuring device is disclosed. One aspect includes a body portion including a hollow portion therein and a through-portion formed in a first region so that the hollow portion communicates with the outside; an electrode unit including a reference electrode and a sensing electrode including different materials and configured to measure the pH in a living body by allowing a first end to be located in the hollow portion and a second end opposite to the first end to be exposed to the outside of the body portion through the through-portion; and a wireless communication unit configured to transmit a pH measurement value sensed by the electrode unit to the outside. 1. A pH measuring device comprising:a body unit comprising a hollow portion therein and a through-portion formed in a first region so that the hollow portion communicates with the environment;an electrode unit comprising a reference electrode and a sensing electrode comprising different materials configured to measure the pH in a living body by allowing a first end to be located in the hollow portion and a second end opposite to the first end to be exposed to the outside of the body unit through the through-portion; anda wireless communication unit configured to transmit a pH measurement value sensed by the electrode unit to the outside.2. The pH measuring device of claim 1 , wherein the reference electrode is a silver/silver chloride (Ag/AgCl) electrode claim 1 , and{'sub': 2', '2', '2', '2', '2', '2', '2', '5, 'the sensing electrode is formed of a metal oxide selected from the group consisting of iridium/iridium oxide (Ir/IrOx), tin oxide (SnO), platinum oxide (PtO), titanium dioxide (TiO), osmium dioxide (OsO), rhodium dioxide (RhO), ruthenium oxide (RuO), and tantalum pentoxide (TaO).'}3. The pH measuring device of claim 1 , wherein the wireless communication unit is electrically connected to the electrode unit and transmits the sensed pH measurement value to the outside using a resonant circuit ...

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Номер записи: 49
30-03-2017 дата публикации

SENSOR ARRANGEMENT

Номер: US20170089859A1
Автор: Eubisch Angela, Hanko Michael, Weiss Michael
Принадлежит:

A sensor arrangement for determining at least one measurand of a measuring medium includes at least one first sensor with a first sensing element used to record measured values of a first measurand of the measuring medium, a housing having a housing wall which surrounds a housing interior containing the first sensing element, wherein the housing interior contains a medium in particular, a liquid which has a predetermined value of the first measurand. 1. A sensor arrangement for determining a measurand of a measuring medium , comprising:a first sensor with a first sensing element configured to record values of a first measurand of a measuring medium; anda housing having a housing wall defining a housing interior, the housing interior containing the first sensing element and a medium having a predetermined value of the first measurand.2. The sensor arrangement according to claim 1 , wherein the first sensing element includes a membrane in contact with the medium.3. The sensor arrangement according to claim 1 , wherein the first sensing element is a potentiometric sensing element comprising a reference half-cell claim 1 , wherein the reference half-cell includes a reference electrolyte in contact with the medium via a crossover claim 1 , and the medium is a liquid having the same composition as the reference electrolyte.4. The sensor arrangement according to claim 1 , wherein the first sensing element is a potentiometric pH-sensing element including a measuring half-cell having a pH glass membrane.5. The sensor arrangement according to claim 1 , the sensor arrangement further comprising:at least one process vessel connection device structured to enable the sensor arrangement to be integrated in a process vessel or to be linked to one or a plurality of process vessel connections.6. The sensor arrangement according to claim 5 , wherein the housing is removable from the sensor arrangement claim 5 , or a link between the housing interior and the process vessel can be ...

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Номер записи: 50
19-03-2020 дата публикации

CARBON DIOXIDE ELECTROLYTIC DEVICE AND METHOD OF ELECTROLYZING CARBON DIOXIDE

Номер: US20200087233A1
Автор: KITAGAWA Ryota, Kudo Yuki, Mikoshiba Satoshi, Motoshige Asahi, ONO Akihiko, Sugano Yoshitsune, Tamura Jun, Yamagiwa Masakazu
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A carbon dioxide electrolytic device includes: an electrolysis cell including a cathode, an anode, cathode and anode flow paths, and a separator; a carbon dioxide source to supply carbon dioxide to the cathode flow path; a solution source to supply an electrolytic solution containing water to the anode flow path; at least one sensor to acquire at least one data of a data indicating a discharge amount per unit time of a liquid containing water to be discharged from at least one flow path and a data indicating a concentration of at least one ion in the liquid; a refresh material source including a gas source to supply a gaseous substance to the at least one flow path; and a controller programmed to stop the supply of the carbon dioxide and the electrolytic solution, and start supply of a gaseous substance from the refresh material source, in accordance with the at least one data. 1. A carbon dioxide electrolytic device , comprising: a cathode to reduce a first substance containing carbon dioxide and thus produce a first product containing a carbon compound,', 'an anode to oxidize a second substance containing water or hydroxide ions and thus produce a second product containing oxygen,', 'a cathode flow path facing the cathode,', 'an anode flow path facing the anode, and', 'a separator separating the anode and the cathode;, 'an electrolysis cell including'}a carbon dioxide source to supply the carbon dioxide to the cathode flow path;a solution source to supply an electrolytic solution containing water to the anode flow path;at least one sensor to acquire at least one data selected from the group consisting of a data indicating a discharge amount per unit time of a liquid containing water to be discharged from at least one flow path selected from the group consisting of the anode and cathode flow paths and a data indicating a concentration of at least one ion selected from the group consisting of ions in the liquid;a power controller to apply a voltage between the anode ...

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Номер записи: 51
19-03-2020 дата публикации

APPARATUS AND METHOD FOR DETECTING TRACE METALS WITH ELECTRICALLY CONDUCTIVE DIAMOND ELECTRODES

Номер: US20200088671A1
Автор: Becker Michael Frank, Schuelke Thomas
Принадлежит:

A trade metal analysis detector and method of operating the same to detect metals in various fluid samples using boron doped diamond working electrodes. 1. A system for detecting trace metals in a fluid;a detector configured to receive a fluid sample in at least one input and at least one passageway extending therefrom;a boron doped diamond electrode;a reference electrode: anda counter electrode.2. The system of whereinsaid boron doped diamond electrode is located within a passageway, of said at least one passageways.3. The system of wherein said chip includes a plurality of boron doped diamond electrodes in said passageway.4. The system of wherein said detector is a chip having a substrate claim 1 , a gasket and a top layer claim 1 , which cooperate to form passageways and chambers.5. The system of wherein said detector is a chip having:an analysis chamber and wherein said boron doped diamond electrode is located proximate to said analysis chamber and a pH meter located in at least one of said analysis chamber and at least one of said at least one passageway.6. The system of further comprising;a second passageway extending between said input chamber and said analysis chamber;a pH electrode configured to modify the pH of the fluid passing through the second passageway.7. The system of further including:a pH mater in said analysis chamber, and wherein the pH electrode is only located in said second passageaway.8. The system of further Including:a second input chambera second passageway extending from said second input chamber to one of said first passageway or said first analysis chamber; anda pH electrode configured to modify the pH of the fluid passing through the second passageway: and into either of said first passageway or said first analysis chamber.9. The system of wherein said analysis chamber includes a pH molar.10. The system of further including a pH modifying chamber configured to supply a fluid having a different pH than the sample to the analysis ...

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Номер записи: 52
16-04-2015 дата публикации

Measurement device with automated calibration

Номер: US20150101938A1
Автор: Bychkova Valeriya, CHO Sung Kwon, CLARK William, FLAHERTY J. Christopher, Flaherty R. Maxwell, Mcconnell Ashley, STAR ALEXANDER, SYCIARZ Timothy J., Wagner David, ZHAO Yuejun
Принадлежит: pHase2 microtechnologies, LLC

A system for obtaining a pH measurement comprises a disposable probe and a reusable reader. The disposable probe includes an indicating electrode and a reference electrode. The reader operably engages the disposable probe and provides pH information of a sample. The system is configured to be self-calibrating. The system is constructed and arranged to provide pH information based on the potentiometric measurement of the sample solution based on signals received from the at least one indicating electrode and the at least one reference electrode. 1. A system for determining a pH measurement comprising: at least two electrodes,', 'wherein a first of the at least two electrodes is in continuous contact with a calibration material and functions as a reference electrode; and', 'a second of the at least two electrodes is in temporary contact with the calibration material for calibration prior to contact with a sample and functions as an indicating electrode., 'at least one disposable probe comprising2. The system of wherein the system is constructed and arranged to provide the pH information based on a measurement of the sample solution based on signals received from the at least one indicating electrode and the at least one reference electrode when the at least one reference electrode is in contact with a reference solution and when the at least one indicating electrode is in contact with the sample claim 1 , wherein the measurement is selected from the group consisting of a potentiometric measurement claim 1 , an amperometric measurement claim 1 , and a resistive measurement.3. The system of wherein the calibration material is a reference solution.47-. (canceled)8. The system of wherein the at least one disposable probe is constructed and arranged to provide individual pH measurements for multiple different samples.9. The system of any one of the previous claims wherein the disposable probe comprises a puncturable access port.1013-. (canceled)14. The system of wherein ...

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Номер записи: 53
12-05-2022 дата публикации

MEASURING ELEMENT FOR ANION-SENSITIVE SOLID-CONTACT ELECTRODE AND ION-SENSITIVE SOLID-CONTACT ELECTRODE

Номер: US20220146448A1
Автор: LIMON PETERSEN Juan, Rutz Andreas
Принадлежит: Mettler-Toledo GmbH

A measuring element is disclosed for an ion-sensitive solid-contact electrode for measuring ion activity in a measurement medium. An ion-sensitive solid-contact electrode having such a measuring element and an electrochemical sensor having such a solid-contact electrode are also disclosed. The measuring element can include an ion-sensitive layer arranged to contact a measurement medium when in operation, and conductive to lithium ions; and a single-phase electrically conductive layer, which includes metallic lithium or a lithium-(0)-alloy. A solid-state electrolyte layer can be arranged between the ion-sensitive layer and the electrically conductive layer. 1. A measuring element for an ion-sensitive solid-contact electrode for measuring ion activity in a measurement medium , the measuring element comprising:an ion-sensitive layer, arranged to contact a measurement medium when in operation, and conductive for lithium ions; and a single-phase electrically conductive layer which includes metallic lithium or a lithium-(0)-alloy, wherein the measuring element is a solid-state measuring element which includes a solid-state electrolyte layer arranged between the ion-sensitive layer and the electrically conductive layer.2. The measuring element according to claim 1 , wherein the ion-sensitive layer comprises:an ion-sensitive glass, which is conductive for lithium ions.3. The measuring element according to claim 1 , wherein the lithium-(0)-alloy of the single-phase electrically conductive layer is a single-phase lithium-magnesium alloy claim 1 , a lithium-copper alloy or a mixture thereof.4. The measuring element according to claim 3 , wherein the lithium-(0)-alloy is a lithium-rich single-phase lithium-magnesium alloy with a cubic body-centered crystal structure.5. The measuring element according to claim 1 , wherein the solid-state electrolyte layer comprises one of the following:Li-ion-conducting solid-state compounds or mixtures thereof;any lithium borates, including ...

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Номер записи: 54
12-05-2022 дата публикации

Solid state reference gel

Номер: US20220146453A1
Автор: Jinbo Hu
Принадлежит: Rosemount Inc

A solid state gel for use in a pH sensor comprises a reaction product of water, a buffer system for adjusting pH of the gel when in a liquid state, polyethylene glycol or its derivatives as a gelling agent and a salt wherein the water, the buffer, the polyethylene glycol and a reference electrolyte salt when mixed while in a liquid state form a mixture that was subjected to Gamma irradiation to form the reaction product.

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Номер записи: 55
12-04-2018 дата публикации

Method for testing at least one disinfectant

Номер: US20180100821A1
Автор: BRANDES Ronald, WILLMS Joachim
Принадлежит:

In a method for testing the disinfecting activity of at least one disinfectant it is provided that at least one sample of the disinfectant is measured with a sensor in regard to a change in at least one physical and/or chemical property of the disinfectant. 1. A method for testing the disinfecting activity of at least one disinfectant ,whereinat least one sample of the disinfectant is measured with a sensor in regard to a change in at least one physical and/or chemical property of the disinfectant.2. The method according to claim 1 , wherein a conductivity sensor is used as the sensor.3. The method according to claim 1 , wherein a photosensor is used as the sensor.4. The method according to claim 1 , wherein a pH meter is used as the sensor.5. The method according to claim 1 , wherein a density sensor is used as the sensor. The invention relates to a method for testing the disinfecting activity of at least one disinfectant.Disinfectants are used for killing microbes in many environments. They are regularly used in hospitals, children's homes or old-age homes, in which large numbers of pathogenic organisms may be present. Disinfectants are, for example, kept in containers from which disinfectants may be taken for spraying the hands, for spraying cloths or the like.One problem is that pressure situations frequently occur in such hospitals and homes, relating to high patient or resident populations, low staffing, or large numbers of trainees or community service workers. All this can mean that a disinfectant is held in a specific container for weeks or even months without attention being paid to its expiration date. A disinfectant of this type can lose its disinfecting activity, and indeed it may even become contaminated with microbes. Then a disinfectant would become a source of microbes.The invention is based on the task of specifying a method of the initially mentioned class with which the disinfecting activity of a disinfectant can be reliably tested.This goal is ...

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Номер записи: 56
13-04-2017 дата публикации

Inhibition of sensor biofouling

Номер: US20170101329A1
Автор: Nathan Scott Lawrence, Steven Antony Gahlings
Принадлежит: Schlumberger Technology Corp

Generating hydrogen peroxide in situ in a water environment to mitigate biofouling of a water sensor. A hydrogen peroxide generator submerged in the water environment generates hydrogen peroxide to remove/mitigate biofouling of the water sensor. The water sensor may be an electrochemical sensor and the hydrogen peroxide generator may be an electrochemical system that is integrated with the sensor. The water sensor may be able to operate without interference from the generated hydrogen peroxide.

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Номер записи: 57
13-04-2017 дата публикации

SOLID STATE ELECTRODES AND SENSORS

Номер: US20170101513A1
Автор: Andrew James, Lee Eric K., Vilozny Boaz
Принадлежит: Parker-Hannifin Coporation

Analyte-insensitive materials comprising polymerizable monomers suitable for use in forming a hydrophilic, cross-linked gel comprising on the surface of a substrate for an electrode. 1. A pH sensing device comprising an electrode having a substrate surface on which is immobilized a hydrogel comprising an analyte-insensitive material (AIM)-containing monomer , and at least one additional monomer selected from the group consisting of i) triethyleneglycol methyl ether methacrylate , and ii) N ,N-dimethylacrylamide , and comprising a stoichiometric ratio of the triethyleneglycol methol ether methacrylate:AIM-containing monomer from approximately 100:1 to approximately 1000:1 , and comprising a stoichiometric ratio of the triethylenglycol methol ether methacrylate:AIM-containing monomer:N ,N-dimethylacrylamide of approximately 90:1:10 , 85:1:15 , 80:1:20 , 900:1:100 , 800:1:200 , and 0:1:100.2. The device of claim 1 , further comprising at least one crosslinking monomer selected from the group consisting of i) methylene(bis)acrylamide claim 1 , and ii) poly(ethyleneglycol)diacrylate claim 1 , and comprising a stoichiometric ratio of triethyleneglycol methol ether methacrylate:AIM-containing monomer:methylene(bis)acrylamide claim 1 , or triethyleneglycol methol ether methacrylate:AIM-containing monomer:poly(ethyleneglycol)diacrylate of from approximately 1000:1:5 to approximately 1000:1:20 claim 1 , and from approximately 1000:10:5 to approximately 1000:10:20.3. The device of claim 1 , wherein the stoichiometric ratio corresponds to a mol % of ferrocene in the hydrogel of from approximately 0.1 mol % to approximately 1.0 mol %.4. The device of claim 2 , wherein the hydrogel is cross-linked.5. The device of claim 1 , wherein the AIM of the AIM-containing monomer is ferrocene.6. A cross-linked hydrogel precursor polymer claim 1 , comprising an AIM-containing monomer claim 1 , and at least one additional monomer consisting of two carbon backbone units claim 1 , and ...

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Номер записи: 58
13-04-2017 дата публикации

ELECTRODE, COMPOSITE ELECTRODE, AND LIQUID ANALYZER

Номер: US20170102351A1
Автор: YAMANOUCHI Hisashi
Принадлежит:

A purpose of this invention is to provide an electrode that is extremely preferably used for measuring a pH of a cell culture medium. This electrode is designed to be inserted into an insertion bore arranged on a container into which a sample solution as being a measuring object is put, and comprises an internal electrode, a storage that houses the internal electrode, a gelled or liquefied internal liquid that is filled into the storage so as to contact the internal electrode, and a sensor part that is electrically connected to the internal electrode through the internal liquid and arranged at a distal end surface of the storage as to detect a electric potential of the sample solution. The storage has a positioning surface for positioning the storage at a mounting position at which the inner wall surface of the container and the distal end surface of the storage are on the same plane. 1. An electrode that is inserted into an insertion bore arranged on a container into which a sample solution as being a measuring object is put , and is characterized by comprisingan internal electrode,a storage that houses the internal electrode,a gelled or liquefied internal liquid that is filled into the storage on as to contact the internal electrode, anda liquid junction or responsive membrane that is electrically connected to the internal electrode through the internal liquid and arranged at a distal end surface of the storage in order to detect an electric potential of the sample solution, whereinthe storage has a positioning surface for positioning the storage at a mounting position at which the inner wall surface of the container and the distal end surface of the storage are on the same plane.2. The electrode described in claim 1 , whereinthe storage is positioned at the mounting position when the positioning surface receives a force whose direction is opposite to an insertion direction of the storage inserted into the insertion bore.3. The electrode described in claim 2 , ...

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Номер записи: 59
19-04-2018 дата публикации

Protective coating for a potentiometric electrode assembly

Номер: US20180106748A1
Автор: Grimm Christian, LUEDERS Julia, Weichert Henry
Принадлежит:

There is provided a potentiometric electrode assembly comprising an ion-selective electrode, a reference electrode and a reference electrode electrolyte, the reference electrode having a diaphragm or an open-junction opening or a combination thereof which is provided with a protective coating detachable and/or dissolvable upon contact with aqueous solution. 1. A potentiometric electrode assembly comprising an ion-selective electrode , a reference electrode and a reference electrode electrolyte , the reference electrode having a diaphragm or an open-junction opening or a combination thereof , at least the diaphragm or the open-junction opening being provided with a protective coating detachable and/or dissolvable upon contact with an aqueous solution.2. The potentiometric electrode assembly as claimed in claim 1 , wherein the ion-selective electrode is an H-selective glass electrode claim 1 , the reference electrode is an Ag/AgCl reference electrode claim 1 , and the reference electrode electrolyte is an aqueous alkali metal halide.3. The potentiometric electrode assembly as claimed in claim 1 , wherein the ion-selective electrode is intended for single use claim 1 , is integrally fitted in a container claim 1 , and container and electrode assembly have been sterilized after fitting of the electrode assembly.4. The potentiometric electrode assembly as claimed in claim 1 , wherein the detachable and/or dissolvable protective coating is a material authorized for pharmaceutical manufacturing processes.5. The potentiometric electrode assembly as claimed in claim 1 , wherein the detachable and/or dissolvable protective coating does not inhibit cell growth.6. The potentiometric electrode assembly as claimed in claim 1 , wherein the material of the detachable and/or dissolvable protective coating is selected from:substances and/or nutrients usually present in a culture liquid;polymers degradable in aqueous solutionexcipients for medicaments.7. The potentiometric electrode ...

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Номер записи: 60
30-04-2015 дата публикации

Measurement Device with Reader and Disposable Probe

Номер: US20150114836A1
Автор: CHO Sung Kwon, CLARK William, FLAHERTY J. Christopher, Flaherty R. Maxwell, SYCIARZ Timothy J., ZHAO Yuejun
Принадлежит:

A system for obtaining a pH measurement comprises a disposable probe and a reader. The disposable probe includes at least one indicating electrode and at least one reference electrode. The reader is configured to operably engage with the disposable probe and provide pH information of a sample. 1. A system for obtaining a pH measurement comprising: at least two electrodes; and', 'at least one fluidic channel arranged and constructed to support a virtual liquid junction between a reference solution and a sample,, 'at least one disposable probe comprisingwherein at least one electrode is in contact with the reference solution and function as a reference electrode and at least on electrode is in contact with the sample and functions as an indicating electrode.28-. (canceled)9. The system of further comprising a cap configured to prevent drying out of the virtual liquid junction claim 1 , or to engage with an end of the disposable probe and to protect said end.1013-. (canceled)14. The system of wherein the at least one reference electrode and the at least one indicating electrode is positioned within the at least one fluidic channel.15. The system of wherein the at least one fluidic channel is constructed and arranged to transport the reference solution.16. The system of further comprising a pumping assembly constructed and arranged to cause said transport.17. The system of wherein the at least one fluidic channel is constructed and arranged to transport the sample.1823-. (canceled)24. The system of further comprising a reservoir constructed and arranged to store reference solution.25. The system of further comprising a barrier positioned between the at least one reference electrode and said reference solution reservoir claim 24 , the barrier configured to be removed claim 24 , broken claim 24 , or opened to allow flow of fluid.2629-. (canceled)30. The system of wherein the disposable probe comprises a first portion and a second portion claim 1 , and wherein said first ...

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Номер записи: 61
10-07-2014 дата публикации

pH Sensor

Номер: US20140190825A1
Автор: Michael D. Mosley, Paul Decker
Принадлежит: Digital Concepts of Missouri Inc

Improvements in references electrodes, halogen sensors, pH sensors, TDS sensors, combinations thereof, and related methods.

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Номер записи: 62
29-04-2021 дата публикации

MULTI-FUNCTIONAL WATER QUALITY SENSOR

Номер: US20210123875A1
Автор: Brondum Klaus, Burns Mark A., Johnson Brian J., Lin Wen-Chi, Marty Garry, McCague Michael, Stec Stephen Michael
Принадлежит: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

A multi-functional water quality sensor assembly includes an electrically non-conductive substrate carrying electrically conductive traces that comprise one or more electrodes configured to sense at least one of oxidation reduction potential (ORP) or acidity (pH) of water. The electrodes are configured to be operated according to a dynamic mode, which includes establishing constant potentials or constant currents between the electrodes and documenting potentials between the electrodes as a measure of ORP and/or pH, and/or determining a differential in the potentials between first and second times as a measure of pH of the water, wherein the dynamic mode may be carried out without use of a silver chloride reference electrode. 1. A dynamic mode of operating a three electrode setup for ORP and pH documentation of a media comprising:establishing a first constant potential or a first constant current between a working electrode and a counter electrode and documenting a first documented potential between the working electrode and a reference electrode as a measure of ORP of a media;establishing a second constant potential or a second constant current between the working electrode and the counter electrode and documenting a second documented potential between the working electrode and the reference electrode;establishing a third constant potential or a third constant current between the working electrode and the counter electrode and documenting a third documented potential between the working electrode and the reference electrode; anddetermining a difference between the second and third documented potentials between the working and reference electrodes as a measure of a pH of the media.2. The dynamic mode of operating a three electrode setup according to claim 1 , further comprising a pulse anemometer mode of operating a flow sensor that includes:creating a temperature profile comprised of peak and valley temperatures of a substrate exposed to a media via heat pulses ...

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Номер записи: 63
02-04-2020 дата публикации

Differential sensing with biofet sensors

Номер: US20200103369A1
Автор: Ching-Hui Lin, Chun-Ren Cheng, Fu-Chun Huang, Shih-Fen Huang
Принадлежит: Taiwan Semiconductor Manufacturing Co TSMC Ltd

A sensor array includes a semiconductor substrate, a first plurality of FET sensors and a second plurality of FET sensors. Each of the FET sensors includes a channel region between a source and a drain region in the semiconductor substrate and underlying a gate structure disposed on a first side of the channel region, and a dielectric layer disposed on a second side of the channel region opposite from the first side of the channel region. A first plurality of capture reagents is coupled to the dielectric layer over the channel region of the first plurality of FET sensors, and a second plurality of capture reagents is coupled to the dielectric layer over the channel region of the second plurality of FET sensors. The second plurality of capture reagents is different from the first plurality of capture reagents.

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Номер записи: 64
09-04-2020 дата публикации

SENSOR WITH NONPOROUS REFERENCE JUNCTION

Номер: US20200110052A1
Автор: Huo Jinshan, Saclot Thelma
Принадлежит:

According to at least one aspect of the present disclosure, a reference half-cell for an electrochemical sensor for measuring a medium is disclosed. The reference half-cell includes a housing defining a chamber containing an electrolyte, the housing including a wall having an aperture therethrough, and an electrode disposed in the electrolyte in the chamber. The reference half-cell further includes a reference junction disposed in the aperture such that an interface between the reference junction and the housing wall is impermeable. The reference junction is electrically or ionically conductive and impermeable to the measured medium and the electrolyte, and the reference junction enables a constant potential at the electrode. An electrochemical sensor and oxidation-reduction potential sensor employing the reference junction are also disclosed. 1. A reference half-cell for an electrochemical sensor for measuring at least one measured variable of a measured medium , the reference half-cell comprising:a housing defining a chamber containing an electrolyte, the housing including a wall having an aperture therethrough;an electrode disposed in the electrolyte in the chamber; anda reference junction disposed in the aperture such that an interface between the reference junction and the housing wall is impermeable, wherein the reference junction is electrically or ionically conductive and impermeable to the measured medium and the electrolyte, and wherein the reference junction enables electrical current flow between the electrode and a measuring half-cell and maintains a constant potential at the electrode.2. The reference half-cell of claim 1 , wherein the reference junction consists essentially of lanthanum trifluoride.3. The reference half-cell of claim 1 , wherein the reference junction is a carbon-containing compound.4. The reference half-cell of claim 3 , wherein the reference junction consists essentially of graphite.5. The reference half-cell of claim 3 , wherein ...

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Номер записи: 65
13-05-2021 дата публикации

Multi-Functional Water Quality Sensor

Номер: US20210140904A1
Автор: Brondum Klaus, Burns Mark Andrew, Johnson Brian N., Lin Wen-Chi, Marty Garry, McCague Michael, Stec Stephen Michael
Принадлежит:

A multi-functional sensor assembly includes an electrically non-conductive substrate defining at least a distal region, intermediary region, and proximal region that are each covered with electrically conductive traces. The proximal region is configured to be exposed to a media to be sensed and the distal and intermediary regions are configured to be protected from the media. The electrically conductive traces comprise at least electrical circuits to sense temperature and flow of the media and one or more electrodes to sense one or more of conductivity, oxidation reduction potential (ORP), and acidity (pH) of the media. 1. A sensor assembly for water , the sensor assembly comprising:an electrically non-conductive substrate; andelectrically conductive traces carried by the electrically non-conductive substrate, the electrically conductive traces comprising electrical circuits to sense a temperature of the water and a flow rate of the water, a temperature sensor circuit configured to determine the temperature of the water; and', 'a heater circuit configured to produce a temperature increase, and, 'wherein the electrical circuits comprisewherein a dissipation of the temperature increase is a function of the flow rate of the water passing the sensor assembly such that the dissipation is translated into the flow rate of the water.2. The sensor assembly of claim 1 , wherein the temperature sensor circuit is configured to determine the temperature of the water in a power-off mode when the heater circuit is not powered and configured to determine the flow rate of the water in a power-on mode when the heater circuit is powered.3. The sensor assembly of claim 1 , wherein the heater circuit is configured to apply a heat pulse for determination of the flow rate of the water using the temperature sensor circuit.4. The sensor assembly of claim 1 , wherein:the temperature increase has a peak temperature; andthe peak temperature is translated into the flow rate of the water.5. The ...

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Номер записи: 66
13-05-2021 дата публикации

GLASS ELECTRODE AND LIQUID PROPERTY MEASUREMENT DEVICE

Номер: US20210140914A1
Автор: AMAMIYA Hideyuki, OHSUGA Jun, SAKUMA Akiho, TORIGOE Yoshiaki
Принадлежит: ATAGO CO., LTD

A glass electrode is capable of measuring a cation concentration of a test solution. The glass electrode includes a flat sensitive glass body sensitive to ions, a base body formed of a glass tube housing an internal solution, and a fixation layer used to sealingly attach the sensitive glass body to an end surface of the base body. A resistance value of the fixation layer is equal to or higher than a resistance value of the sensitive glass body. A liquid property measurement device is equipped with the glass electrode. 1. A glass electrode comprising:a flat sensitive glass body sensitive to ions;a base body formed of a glass tube housing an internal solution; anda fixation layer used to sealingly attach the sensitive glass body to an end surface of the base body, whereinthe glass electrode is configured to measure a cation concentration of a test solution, anda resistance value of the fixation layer is equal to or higher than a resistance value of the sensitive glass body.2. The glass electrode according to claim 1 , wherein the sensitive glass body is sensitive to hydrogen ions.3. A liquid property measurement device comprising: a flat sensitive glass body sensitive to ions,', 'a base body formed of a glass tube housing an internal solution, and', 'a fixation layer used to sealingly attach the sensitive glass body to an end surface of the base body; and, 'a glass electrode including'}a test solution holding portion including a recess portion which has a bottom portion with a flat surface shape and which houses the test solution, whereinthe liquid property measurement device is configured to measure a cation concentration of a test solution, andthe sensitive glass body is exposed in the bottom portion without forming a step.4. The liquid property measurement device according to claim 3 , wherein a resistance value of the fixation layer is equal to or higher than a resistance value of the sensitive glass body.5. The liquid property measurement device according to ...

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Номер записи: 67
13-05-2021 дата публикации

Glass assembly, method of making the same and electrochemical sensor

Номер: US20210140915A1
Автор: Matthäus Speck, Thomas Wilhelm
Принадлежит: Endress and Hauser Conducta GmbH and Co KG

The present disclosure discloses a glass assembly, for forming an electrochemical sensor, comprising a glass immersion tube, a glass membrane connected to a distal end of the immersion tube, wherein the glass which forms the immersion tube contains no lead, no lead compound, no lithium, and no lithium compound.

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Номер записи: 68
25-08-2022 дата публикации

MEASURING ION STRENGTH USING CLOSED-LOOP ELECTROCHEMICAL PH MODULATION

Номер: US20220268729A1
Автор: Darvish Armin, Fomina Nadezda, Johnson Christopher, Lang Christoph, Shin Young Shik
Принадлежит:

Provided is a method for monitoring a change of ion strength in a sample solution by a closed-loop device that provides continuous cycling of electrochemical pH modulation between pre-defined pH values. In particular, the change of ion strength may be induced by a chemical reaction and may ultimately alter the electrical control parameters of the closed-loop device. By measuring such electrical control parameters, the degree and progress of the underlying chemical reaction may be monitored. 1. A method for monitoring a chemical reaction , comprising the buffered solution comprises a pH modulating agent;', 'the closed-loop device comprises an electronic controller, a working electrode, a counter electrode, a reference electrode, and a sensing element, wherein the working electrode, the counter electrode, the reference electrode, and the sensing element are immersed in the buffered solution; and', 'the chemical reaction causes a change of ionic strength of the buffered solution;, '(a) starting the chemical reaction in a buffered solution equipped with a closed-loop device, wherein'}(b) applying a current or voltage to the working electrode, whereupon the pH modulating agent causes a change of a pH value in a zone adjacent to the surface of the working electrode;(c) detecting the change of ionic strength of the buffered solution with the closed-loop device.2. The method of claim 1 , wherein the detecting comprises(c1) controlling the current or voltage applied to the working electrode, thereby modulating the pH value in the zone between a first target pH value and a second target pH value;(c2) measuring one or more parameters of the closed-loop device; and(c3) quantitating the change of ionic strength of the buffered solution from the one or more parameters.3121212334. The method of claim 2 , wherein the one or more parameters are selected from the group consisting of: the current or voltage applied to the working electrode claim 2 , the first target pH value claim 2 , ...

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Номер записи: 69
19-05-2016 дата публикации

Method for Manufacturing a Glass Assembly and Apparatus for Executing the Method

Номер: US20160137541A1
Автор: Carsten Enderwitz, Roland Zilly, Ronny Kuhn, Torsten Zeidler
Принадлежит: Endress and Hauser Conducta Gesellschaft fuer Mess und Regeltechnik mbH and Co KG, Endress and Hauser Conducta GmbH and Co KG

A method for manufacturing a glass assembly comprises the steps: lowering of a dip pipe that gas may flow through vertically to the surface of a glass melt; determining when the surface of the glass melt is encountered by the dip pipe end showing towards the glass melt by detecting an increase of the gas pressure found inside the dip pipe; continued lowering of the dip pipe until a predetermined depth of entry of the dip pipe end showing towards the glass melt is reached; obtaining a predetermined pressure inside the dip pipe while the dip pipe first stays at the given immersion depth for the given duration and after the predetermined duration is completed, is lifted with a given speed vertically to the surface of the glass melt, thus creating a gas bubble in the glass melt whose walls are attached to the end of the dip pipe; continued lifting of the dip pipe vertically to the surface of the glass melt until the gas bubble is separated from the glass melt, with the wall of the gas bubble remaining at the dip pipe end as a closing film; and setting, especially controlling and/or adjusting of the pressure inside the dip pipe based on the geometry of the film closing the end of the dip pipe as determined by an image capturing device.

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Номер записи: 70
09-05-2019 дата публикации

Electronic control of the ph of a solution close to an electrode surface

Номер: US20190137444A1
Автор: Ashwin Raghunathan, Autumn MARUNIAK, Christoph Lang, Christopher Johnson, Habib Ahmad, Nadezda Fomina, Sam Kavusi
Принадлежит: ROBERT BOSCH GMBH

Device and methods for use in a biosensor comprising a multisite array of test sites, the device and methods being useful for modulating the binding interactions between a (biomolecular) probe or detection agent and an analyte of interest by modulating the pH or ionic gradient near the electrodes in such biosensor. An electrochemically active agent that is suitable for use in biological buffers for changing the pH of the biological buffers. Method for changing the pH of biological buffers using the electrochemically active agents. The methods of modulating the binding interactions provided in a biosensor, analytic methods for more accurately controlling and measuring the pH or ionic gradient near the electrodes in such biosensor, and analytic methods for more accurately measuring an analyte of interest in a biological sample.

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Номер записи: 71
10-06-2021 дата публикации

HALF CELL AND METHOD FOR MANUFACTURING A HALF CELL

Номер: US20210172896A1
Автор: Speck Matthäus
Принадлежит:

A half cell for an electrochemical sensor includes: a housing having a chamber, wherein the chamber includes an electrolyte; an electrically conductive lead in contact with the electrolyte; and a closure element connecting the lead to the housing, wherein the lead has a coating, and the coating includes molecules including a first functional group, which enables the molecule to interact chemically with the lead, and a second functional group different from the first functional group, which enables the molecule to interact chemically with the closure element, wherein a first portion of the molecules with the first functional group are in an intermolecular connection with the lead and the first portion of the molecules and/or a second portion of the molecules with the second functional group are in an intermolecular connection with the closure element. 1. A half cell for an electrochemical sensor , the half cell comprising:a housing defining a chamber, wherein the chamber contains an electrolyte;a lead that is electrically conductive and is in contact with the electrolyte; anda closure element connecting the lead to the housing, wherein the lead includes a coating comprising molecules that include a first functional group selected to enable the molecules of the coating to interact chemically with the lead and that include a second functional group, which is different from the first functional group, selected to enable the molecules to interact chemically with the closure element,wherein a first portion of the molecules with the first functional group are in an intermolecular connection with the lead, and wherein the first portion of the molecules and/or a second portion of the molecules with the second functional group are in an intermolecular connection with the closure element.2. The half cell of claim 1 , wherein the lead comprises a metal claim 1 , a semi-precious metal or a noble metal.3. The half cell of claim 1 , wherein the closure element comprises a material ...

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Номер записи: 72
25-05-2017 дата публикации

Analyte sensor

Номер: US20170146478A1
Автор: Eric Lee, Jai Krishnamurthy, Mark Micklatcher
Принадлежит: Parker Hannifin Corp, SENOVA SYSTEMS Inc

Matrix materials, such as sol-gels and polymers derivatives to contain a redox active material can be used to form electrodes and probes suitable for use in pH meters and other analyte sensing devices.

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Номер записи: 73
11-06-2015 дата публикации

Apparatus and Method for Testing Medicaments

Номер: US20150160176A1
Автор: Basit Abdul Waseh, Frost John Andrew, Merchant Hamid Ali
Принадлежит:

Apparatus for testing the solubility of a medical dosage form includes a chamber () for holding a solvent medium (), in the preferred embodiment a bicarbonate based buffer system. The apparatus also includes a pH probe () which is connectable to a supply of carbon dioxide (),as well as to a supply of helium (), the supplies being controlled by a control unit (). The control unit () monitors changes in pH of the solvent medium () and, as appropriate, feeds pH increasing and/or pH reducing gas from the supplies() into the chamber (). The control unit () is able to maintain a uniform pH during testing or to provide a dynamically adjustable pH during testing, for example to three or more different pH levels in order to test the performance of a drug carrier at different levels of acidity or alkalinity for example, mimicking the conditions of the gastrointestinal tract. The apparatus() and associated method are particularly suitable for testing and developing dosage forms for oral delivery of drugs. 1. An apparatus for testing pH-induced changes in a test substance including:a chamber for holding a solvent medium and the test substance;a sensing device for sensing a parameter derivable from the chamber, the parameter being indicative of a pH-dependent change in the test substance;a pH probe disposable in the chamber for measuring the pH of solvent medium in the chamber;a first valve coupling connectable to a supply of pH reducing fluid, the first valve coupling including a first conduit feeding into the chamber;a second valve coupling connectable to a supply of pH increasing fluid, the second valve coupling including a second conduit feeding into the chamber;a control device connected to the probe and to the first and second valve couplings and operable to control the supply of pH increasing and pH reducing fluid into the chamber on the basis of the determined pH within the chamber; anda data logger operable to keep a log of data obtained during operation of the ...

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Номер записи: 74
11-06-2015 дата публикации

UNIVERSAL WATER CONDITION MONITORING DEVICE

Номер: US20150160178A1
Автор: Lee Kye-Shin, MAHAJAN Ajay
Принадлежит:

The present invention is directed to a water condition monitoring device and related methods of use that significantly reduce the cost of the water condition monitoring devices by replacing the expensive and bulky multiple sensor electrodes of currently available devices with a single set of two or three metal electrodes to detect and/or measure such water quality parameters as pH, electric conductivity, temperature, and dissolved oxygen content. A microcontroller activates each sensor one at a time in a continuous loop, processing the sensor signals into near real time water condition data, which may be stored, displayed, or sent to a remote location for storage or display. 1. A water condition monitoring device comprising:a first electrode and a second electrode, wherein said first and second electrodes are made from different conductive metals;a pH sensing unit coupled to said first and second electrodes;an electrical conductivity sensing unit coupled to said first and second electrodes; anda microcontroller, coupled to said pH sensing unit and said electrical conductivity sensing unit.2. The water condition monitoring device of claim 1 , further comprising a temperature sensing unit coupled to said first or said second electrode and said microcontroller.3. The water condition monitoring device of claim 1 , further comprising a dissolved oxygen sensing unit coupled to said first and second electrodes claim 1 , a third electrode claim 1 , and said microcontroller.4. The water condition monitoring device of claim 2 , further comprising a dissolved oxygen sensing unit coupled to said first and second electrodes a third electrode claim 2 , and said microcontroller.5. The water condition monitoring device of wherein said first electrode further comprises a metal selected from the group consisting of copper claim 1 , zinc claim 1 , nickel claim 1 , platinum claim 1 , silver claim 1 , gold claim 1 , and combinations thereof.6. The water condition monitoring device of ...

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Номер записи: 75
09-06-2016 дата публикации

LOW SLOPE PH ELECTRODE WITH CHARGE TRANSFER COMPONENT

Номер: US20160161446A1
Автор: King Karl Lewis
Принадлежит:

An aspect provides a low slope electrode device, including: a low slope measuring electrode for placement in an external sample solution, said low slope measuring electrode comprising: an electrode disposed within a glass container including an internal buffer solution and at least partially enclosing the electrode of the low slope measuring electrode, the glass container having two pH sensitive regions; an external buffer container including an external buffer solution and at least partially enclosing one of the two pH sensitive regions; and a separating element that separates the two pH sensitive regions; wherein: a first pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external sample solution; a second pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external buffer solution; the separating element, the first pH sensitive region, and the second pH sensitive region establish a charge flow circuit through the internal buffer solution, the external buffer solution, and the external sample solution; and the charge flow circuit acts as a voltage divider for the low slope measuring electrode. Other aspects are described and claimed. 1. A low slope electrode device , comprising: an electrode pairing, wherein a first electrode of the electrode pairing is operatively coupled to a second electrode of the electrode pairing;', 'a glass container including an internal buffer solution and at least partially enclosing the first electrode of the electrode pairing, the glass container having two pH sensitive regions;', 'an external buffer container including an external buffer solution and at least partially enclosing the second electrode of the electrode pairing; and, 'a low slope measuring electrode for placement in an external sample solution, said low slope measuring electrode comprisinga separating element that separates the two pH sensitive regions;wherein: ...

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Номер записи: 76
18-06-2015 дата публикации

ELECTROCHEMICAL SENSORS

Номер: US20150166345A1
Автор: Compton Richard G., Lawrence Nathan Scott, McCormack Sean P., Wildgoose Gregory George
Принадлежит:

An electrode for use in a electrochemical sensor comprises carbon modified with a chemically sensitive redox-active compound, excluding an electrode based on carbon having derivatised thereron two redox-active species wherein at least one of said species is selected from anthraquinone, phenanthrenequinone and N,N′-diphenyl-p-phenylenediamine (DPPD). The invention further provides a pH sensor comprising: 1. A method for preparing an electrode for use in an electrochemical sensor , said method comprising modifying carbon with a chemically sensitive redox active material wherein the material is a single redox active species or two redox active species , with the proviso that the material that is two redox active species does not include anthraquinone , phenanthrenequinone or N ,N=-diphenyl-p-phenylenediamine (DPPD) , to form a chemically sensitive redox derivatized carbon , wherein the chemically sensitive redox derivatized carbon is stable over a period of greater than 1 month.2. A method according to claim 1 , wherein the step of modifying the carbon comprises one or more of the following methods:1) derivatisation via physical adsorption of the chemically sensitive redox active material; and2) physical mixing with the chemically sensitive redox active material and a binder.3. The method according to claim 1 , further comprising the step of applying the carbon modified with the chemically sensitive redox active material to a substrate.4. The method according to claim 3 , wherein the step of applying comprises abrasively immobilising the composition on the surface of the substrate.5. A method for preparing an electrode for use in an electrochemical sensor as claimed in claim 2 , said method comprising modifying carbon with a single chemically sensitive redox active material selected from an anthraquinone claim 2 , phenanthrenequinone or N claim 2 ,N-diphenyl-p-phenylenediamine (DPPD).6. An electrode for use in an electrochemical sensor claim 2 , said electrode ...

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Номер записи: 77
14-05-2020 дата публикации

Determining Characteristics of a Fluid in a Wellbore

Номер: US20200149396A1
Автор: Goodwin Scott, Mandal Batakrishna, Roberson Mark W., Rodney Paul F., Shah Vimal V.
Принадлежит:

An assembly for use in a wellbore can include a plurality of sensors positioned external to a casing string. The plurality of sensors can be positioned for detecting an amount of a hydrocarbon that is present in a fluid in the wellbore and a pH of the fluid in the wellbore. The plurality of sensors can be positioned for wirelessly transmitting signals representing the amount of the hydrocarbon that is present in the fluid and the pH of the fluid to a receiving device. 1. A system comprising:a first sensor that is configured to float in a fluid in a wellbore for detecting an amount of a hydrocarbon that is present in the fluid and for wirelessly transmitting a first signal representing the amount of the hydrocarbon that is present in the fluid to a receiving device; anda second sensor positionable external to a casing string for detecting a pH of the fluid and for wirelessly transmitting a second signal representing the pH of the fluid to the receiving device;wherein the second sensor includes a computing device and a transceiver; andwherein the pH sensor is configured to supply a voltage to a power port of the computing device or the transceiver to power the computing device or the transceiver, respectively.2. The system of claim 1 , wherein the first sensor comprises a hydrocarbon sensor that includes two conductive electrodes positioned in parallel and with a gap between the two conductive electrodes claim 1 , wherein the gap forms a fluid communication path for the fluid to flow.3. The system of claim 2 , wherein the hydrocarbon sensor comprises:a processing device; and transmit a power signal with a frequency that is within a microwave range of frequencies to the two conductive electrodes;', 'detect an electrical characteristic associated with the two conductive electrodes; and', 'determine a type of the fluid based on the electrical characteristic., 'a memory device in which instructions executable by the processing device are stored for causing the processing ...

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Номер записи: 78
08-06-2017 дата публикации

Measurement Device for Measuring a Property of a Fluid

Номер: US20170160222A1
Автор: Kohlmann Frederick J.
Принадлежит:

A measurement device for measuring a property of a fluid, in particular a concentration of a substance or an ion concentration in said fluid or a pH-value of said fluid, comprising: a housing comprising a housing section to be immersed into the fluid during measurement operation, and an aperture foreseen in an outside wall of the housing section, in particular in a side wall surrounding an interior of the housing section or in a front wall closing off a front end of the housing section, for exposing a single sensor for measuring the property of the fluid to the fluid, when the housing section is immersed into the fluid. This allows quick and easy replacement of the single sensor and characterizes in that, a number of at least two sensors for measuring the property are foreseen, each of the sensors is mounted in a different outside surface region of a movable mechanical support, and the mechanical support is movably secured inside the housing by means allowing for the support to be transferred into a number of different measurement positions, wherein in each measurement position a different outside surface region of the support comprising one of the sensors is exposed to the aperture. 115-. (canceled)16. A measurement device for measuring a property of a fluid , in particular a concentration of a substance or an ion concentration in said fluid or a pH-value of said fluid , comprising:a housing comprising a housing section to be immersed into the fluid during measurement operation;an aperture foreseen in an outside wall of said housing section, in particular in a side wall surrounding an interior of said housing section or in a front wall closing off a front end of said housing section, for exposing a single sensor for measuring said property of said fluid to said fluid, when said housing section is immersed into the fluid; anda movable mechanical support, wherein:a number of at least two sensors for measuring said property are provided;each of said sensors is mounted ...

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Номер записи: 79
08-06-2017 дата публикации

Potentiometric sensor

Номер: US20170160228A1
Автор: Manfred Jagiella, Torsten Pechstein
Принадлежит: Endress and Hauser Conducta GmbH and Co KG

A potentiometric sensor includes an electrochemical half-cell with an inner electrolyte, a pickup electrode contacting the inner electrolyte, a sensor element that, in order to detect measured values, can be brought into contact with a measuring medium and, especially, is immersible in the measuring medium, where the sensor is designed as a composite body that includes an ion-selective component which is in contact with the inner electrolyte.

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Номер записи: 80
14-05-2020 дата публикации

ELECTRONIC CHEMICAL SENSOR

Номер: US20200150073A1
Автор: Prone Giulia, Zafar Sufi
Принадлежит:

Devices, systems, methods and products for measuring concentrations of analytes in-situ, including concentrations of ions, proteins, DNA, and, RNA in a variety of mediums including solutions, suspensions, soils, slurries, biological fluids and living organic material such as agricultural crops. Embodiments of the disclosed inventions measure analyte concentration in-situ without clogging reference electrodes, leaking reference solution or having to dilute a medium prior to taking the analyte measurements. In-situ analyte measurements are made without clogging reference electrodes using a combination of solid-state sensors connected to a transducer, a reference electrode enclosed by a non-porous enclosure and a metallic plug extending from the interior cavity of the non-porous enclosure outwardly exterior to the non-porous enclosure, contacting the medium being measured. Automation of analyte measurements are implemented by combining computer systems, computer networks to remotely measure and monitor the analyte present in multiple mediums using sensors placed in a variable number of locations. 1. A device comprising:a transducer encased within a moisture-proof enclosure;a sensing surface electrically connected to the transducer, the sensing surface extending exterior to the moisture-proof enclosure; anda reference electrode, wherein the reference electrode comprises a sealed, non-porous enclosure, a reference solution encased within the non-porous enclosure, a wire submerged in the reference solution and a metallic plug partially enclosed within the non-porous enclosure wherein said metallic plug partially extends exterior to the non-porous enclosure.2. The device of claim 1 , wherein the transducer is a bipolar junction transistor (BJT) comprising an emitter claim 1 , base and collector with the sensing surface electrically connected to the base of the BJT.3. The device of claim 1 , wherein the sensing surface or the wire of the reference electrode is comprised of ...

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Номер записи: 81
24-06-2021 дата публикации

Single-use ph sensor for bioreactor applications

Номер: US20210189319A1
Автор: Andrew S. Dierker, Jinbo Hu, John W. Simon, Rick J. Sumrall, Ryan L. Bowlds, Tyrel L. Ruch
Принадлежит: Rosemount Inc

A pH sensor for a single-use container includes a plunger sleeve configured to couple to a flange of the single-use container. A plunger is axially movable within the plunger sleeve between a storage position and an operating position. A pH sensing element coupled to the plunger wherein the pH element is disposed within a storage chamber in the storage position and is configured to be exposed to an interior of the single-use container in the operating position. In one example, a temperature sensitive element is disposed within the pH sensor and configured to sense temperature proximate the pH sensing element. In another example, a lock member is coupled to the plunger, where the lock member has a locked position and an unlocked position, the lock member being configured to inhibit movement of the plunger when in the locked position. In yet another example, the plunger includes at least one filling channel that allows access to a reference fill chamber when the plunger is in a filling position.

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Номер записи: 82
11-09-2014 дата публикации

SENSOR FOR DETECTING HYDROGEN IONS IN AN AQUEOUS SOLUTION

Номер: US20140251805A1
Автор: Casuscelli Valeria, Occhipinti Luigi Giuseppe, Salzillo Giovanna, Scaldaferri Rossana
Принадлежит: STMICROELECTRONICS S.R.L.

The present disclosure relates to a sensor for detecting hydrogen ions in an aqueous solution comprising a support, a reference electrode, a working electrode and a counter electrode supported by said support, the reference electrode being made of a material comprising silver and silver chloride, the counter electrode being made of a conductive material. The working electrode comprises a substrate and a layer made of an inherently electrically conductive polymer of the polythiophene or polyaniline (PANI) or polypyrrole class.

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Номер записи: 83
15-06-2017 дата публикации

Internal solution for reference electrode, reference electrode, and glass electrode

Номер: US20170168003A1
Автор: Akio Ishii, Taro Tozuka, Yuji Nishio
Принадлежит: Pilot Corp

In order to improve the endurance of this internal solution for a reference electrode beyond that in the prior art, the solution is made to contain a copolymerized material of a crosslinker having a plurality of non-acrylamide functional groups, and a non-acrylamide monofunctional hydrophilic monomer.

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Номер записи: 84
15-06-2017 дата публикации

Method for Producing a pH Half-Cell, and a pH Half-Cell

Номер: US20170168008A1
Автор: Florian Krogmann
Принадлежит: Innovative Sensor Technology IST AG

A method for producing a pH half-cell by means of which, in combination with a reference electrode and an evaluation electronics unit, a pH value of a medium can be determined, comprises the following steps: applying a first structure and a second structure to a substrate, wherein the first structure is applied by means of a thin-film method and forms a resistance element having a temperature-dependent resistance value, and wherein the second structure can be employed to derive a pH-dependent potential; applying a structured passivation glass layer, wherein the passivation glass layer substantially covers the first structure and leaves the second structure substantially uncovered; applying a mixed-conducting glass, wherein the mixed-conducting glass is substantially applied to the region that was left uncovered by the passivation glass layer; and applying a pH-sensitive glass, wherein the pH-sensitive glass is applied to the mixed-conducting glass.

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Номер записи: 85
21-05-2020 дата публикации

ION-SENSING CHARGE-ACCUMULATION CIRCUITS AND METHODS

Номер: US20200158684A1
Автор: Fife Keith G.
Принадлежит:

An ion-sensitive circuit can include a charge accumulation device, to accumulate a plurality of charge packets as a function of an ion concentration of a fluid, and at least one control and readout transistor, to generate an output signal as a function of the accumulated plurality of charge packets, the output signal representing the ion concentration of the solution. The charge accumulation device can include a first charge control electrode above a first electrode semiconductor region, an electrically floating gate structure above a gate semiconductor region and below an ion-sensitive passivation surface, a second charge control electrode above a second electrode semiconductor region, and a drain diffusion region. The first control electrode can control entry of charge into a gate semiconductor region in response to a first control signal. The ion-sensitive passivation surface can be configured to receive the fluid. The second charge control electrode can control transmission of the plurality of charge packets out of the gate semiconductor region and into the drain diffusion region in response to a second control signal. The drain diffusion region can receive the plurality of charge packets from the gate semiconductor region via the second electrode semiconductor region. 1. A method of using an ion-sensing integrated circuit device , comprising:controlling entry of charge into a gate semiconductor region by applying a control signal to a first charge control electrode to form a charge packet in a gate semiconductor region below an electrically floating gate structure;controlling transmission of the charge packet out of the gate semiconductor region and into a drain diffusion region by applying a control signal to a second charge control electrode;accumulating a plurality of charge packets at the drain diffusion region as a function of a surface potential at an analyte solution/passivation layer interface that is above the electrically floating gate; andgenerating ...

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Номер записи: 86
18-09-2014 дата публикации

Low Slope pH Electrode With Charge Transfer Component

Номер: US20140262779A1
Автор: King Karl Lewis
Принадлежит: Hach Company

An aspect includes a low slope electrode device, including: at least one electrode; at least one container at least partially enclosing the at least one electrode and having at least one ion sensitive region; an external buffer container having at least one separating element that separates said at least one ion sensitive region into: a first ion sensitive area separating an internal buffer solution bathing the at least one electrode and an external sample solution; and a second ion sensitive area separating the internal buffer solution bathing the at least one electrode and an external buffer solution; wherein the at least one separating element, the first ion sensitive area, and the second ion sensitive area establish a charge flow circuit. Other aspects are described and claimed. 1. A low slope electrode device , comprising:at least one electrode;at least one container at least partially enclosing the at least one electrode and having at least one ion sensitive region; a first ion sensitive area separating an internal buffer solution bathing the at least one electrode and an external sample solution; and', 'a second ion sensitive area separating the internal buffer solution bathing the at least one electrode and an external buffer solution;, 'an external buffer container having at least one separating element that separates said at least one ion sensitive region intowherein the at least one separating element, the first ion sensitive area, and the second ion sensitive area establish a charge flow circuit.2. The low slope electrode device of claim 1 , wherein the first ion sensitive area and the second ion sensitive area are formed of pH glass.3. The low slope electrode device of claim 1 , wherein the at least one container is a single container; andwherein the first ion sensitive area and the second ion sensitive area are disposed on the single container and separated via insulating glass.4. The low slope electrode device of claim 3 , wherein the at least one ...

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Номер записи: 87
21-06-2018 дата публикации

Measuring Device for Determining Physical Properties, Chemical Properties, Biological Properties and/or Materials in the Surroundings of at Least One Sensor or of the at Least One Sensor as a Component of the Measuring Device

Номер: US20180172615A1
Автор: LAU Matthias
Принадлежит:

The invention relates to measuring devices for determining physical properties, chemical properties, biological properties and/or substances in the environment of at least one transducer or of the at least one transducer itself as a component of the particular measuring device. The measuring devices are in particular characterised in that they are simple and robust to control and their function can be influenced. For this purpose, the measuring device consists of at least one transducer as a component of a passive device and/or as a component of an active measuring functional unit. The active measuring functional unit further consists of a data-processing system and a transceiver unit for electromagnetic radiation, and is interconnected to an electric power source. Furthermore, the transceiver unit of the active measuring functional unit is wirelessly connected to at least one transceiver unit, for electromagnetic radiation, of at least one passive device that 2. Measuring device according to claim 1 , characterised in that the electrical power source is electric mains claim 1 , an accumulator claim 1 , a power store claim 1 , a power converter or a combination thereof.35. Measuring device according to claim 1 , characterised in that the transducer () is an electrochemical sensor claim 1 , a biochemical sensor claim 1 , an optical sensor claim 1 , a semiconductor sensor claim 1 , a solids sensor claim 1 , a microsystem claim 1 , an electrode claim 1 , an optrode claim 1 , a physical sensor element or a combination thereof.42. Measuring device according to claim 1 , characterised in that the passive device () comprises a data-processing system that is connected to the operating element claim 1 , the switch claim 1 , the signalling system claim 1 , the display claim 1 , the data medium claim 1 , the data store claim 1 , a measured value transducer and/or a measuring transmitter.525. Measuring device according to claim 1 , characterised in that the passive device () ...

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Номер записи: 88
08-07-2021 дата публикации

Diffusive gradients in thin films (dgt) probe test device for sediment core in lake and test method using the same

Номер: US20210208031A1
Автор: Bo Zhang, Cheng Yao, Junyi CHEN, Kun Wang, Li Zhao, Qing Cai, Shuhang Wang, Wenwen WANG, Xia Jiang, Zhihao WU
Принадлежит: CHINESE RESEARCH ACADEMY OF ENVIRONMENTAL SCIENCES

The present disclosure provides a diffusive gradients in thin films (DGT) probe test device for a sediment core in a lake, including: a sampling tube, where, a settlement limit device is disposed on an outer wall of the sampling tube and a DGT probe and a multi-parameter water-quality detection electrode are installed within the sampling tube; a movable mudguard device comprising a connecting rod and a mudguard, where, the connecting rod rotates around a rotating shaft to drive the mudguard to move from a position where an opening at the lower end of the sampling tube is sealed to a side of the sampling tube; a position-limit mechanism removably installed outside the sampling tube; a hammering device located above the sampling tube and fixedly connected to the sampling tube; and a floating ball located above the hammering device and connected to the hammering device via a first pull rope.

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Номер записи: 89
30-06-2016 дата публикации

HYDROGEN ION ELECTRODE COMPOSED OF COMPOSITE MATERIAL OF NANO IRIDIUM OXIDE AND POLYMER RESIN AND ENABLING SURFACE REGENERATION, PH SENSOR USING SAME, AND METHOD FOR MANUFACTURING SAME

Номер: US20160187281A1
Автор: Kim Moonhee, Park Jong Man
Принадлежит: EZ SENSING INC.

Provided are a hydrogen ion electrode composed of a composite material of polymer resin and nano iridium oxide, the composite material containing 1-10 nm sized nano iridium oxide particles and/or aggregates thereof which are dispersed to be electrically connected to each other in a moldable, thermoplastic, and hydrophobic polymer resin matrix; a pH sensor using the same; and a method for manufacturing the same. The surface of the hydrogen ion electrode shows very fast pH sensitivity when exposed to a sample solution, and the pH sensitivity is approximate to biphasic characteristics. Furthermore, regardless of high reproducibility of pH sensitivity, abrupt pH change, and repetitive use, very low hysteresis, durability due to high physical strength, and high surface regeneration due to polishing are exhibited, and thus, the lifetime of the electrode can be extended and various sizes and shapes of electrodes can be easily manufactured. 1. A hydrogen ion electrode composed of a composite material of nano iridium oxide and a polymer resin and enabling surface regeneration , in which nano iridium oxide particles having a size of 1 to 10 nm are dispersed to be electrically connected in a moldable , thermoplastic and hydrophobic polymer resin matrix in an individual particle state , an aggregate state in which the particles agglomerate , or a state in which the individual particles and the aggregates are mixed to allow electrical conduction of the hydrogen ion electrode.2. The hydrogen ion electrode of claim 1 , wherein the nano iridium oxide particles having a size of 1 to 10 nm are dispersed in an individual particle state claim 1 , the individual particles being electrically connected so as to allow electrical conduction of the hydrogen ion electrode.3. The hydrogen ion electrode of claim 1 , wherein the nano iridium oxide particles having a size of 1 to 10 nm are dispersed in an aggregate state claim 1 , the aggregates being electrically connected so as to allow ...

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Номер записи: 90
13-06-2019 дата публикации

ELECTROCHEMICAL PH SENSOR COMPRISING A PHENOLIC COMPOUND USING HYDROGEN BONDING OF THE HYDROXYL GROUP TO SULPHUR ATOMS OF THE PHENOLIC COMPOUND

Номер: US20190178831A1
Автор: Lawrence Nathan
Принадлежит: ANB Sensors Limited

An electrochemical pH sensor for measuring pH in a low buffer and/or low ionic strength analyte where the electrochemical pH sensor comprises an electrode coupled with a phenolic redox species and the chemistry of the redox species provides for hydrogen bonding to one or more sulphur atoms of the redox species. 1. An electrochemical sensor for measuring pH in a low buffer or low ionic strength analyte , comprising:a working electrode comprising a phenolic compound, wherein the phenolic compound includes a sulphurous atom attached either directly or indirectly to an aromatic ring of the phenolic compound and configured to form a hydrogen bond with a hydrogen atom associated with a hydroxyl moiety of the phenolic compound.2. The electrochemical sensor of claim 1 , wherein the phenolic compound is polymerized through electrochemical oxidation to form a redox active polymer claim 1 , and wherein the formed redox active polymer does not passivate the electrode.5. The electrochemical sensor of claim 1 , wherein the working electrode comprises: the phenolic compound solvent cast on a conducting substrate claim 1 , the phenolic compound included in a carbon paste or a carbon epoxy claim 1 , the phenolic compound pressed into or onto a conducting substrate claim 1 , the phenolic compound pressed into a cavity in a conducting substrate claim 1 , the phenolic compound polymerized onto a conducting substrate claim 1 , the phenolic compound immobilized on a carbon electrode claim 1 , or the phenolic compound screen-printed onto a conducting substrate.6. The electrochemical sensor according to claim 5 , wherein the conducting substrate or the carbon electrode comprises graphene or carbon nanotubes.7. The electrochemical sensor according to claim 5 , wherein the conducting substrate or the carbon electrode comprises a graphene or carbon wire.8. The electrochemical sensor according to claim 5 , wherein the carbon paste or carbon epoxy comprises graphene or carbon nanotubes.9. The ...

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Номер записи: 91
04-06-2020 дата публикации

MICROFLUIDIC pH-STAT FOR POINT OF CARE (POC) ENZYME DIAGNOSTICS

Номер: US20200173951A1
Автор: Cseefalvi Tamas, Gratzl Miklos, Stanton John, Zhang Zhahao, Zorman Christian
Принадлежит:

A microfluidic pH-stat with a specially-is designed slide and portable device can be used for point-of-care enzyme diagnostics. The slide includes a microchamber and a substrate for the enzyme being tested. The substrate is homogenized with the sample in the microchamber to form a test volume. The microchamber includes a working microelectrode that injects current to split water in the test volume to generate hydrogen ions and/or hydroxide ions and a micro-pH-electrode to measure a pH of the test volume; the slide also includes a reference microelectrode. The device includes a processor to adjust the injected current based on the pH of the test volume and determine an activity of the enzyme based on an amount the injected current is adjusted. 1. A system comprising:a slide comprising a substrate for an enzyme and configured to wick a volume of a sample including the enzyme into a microchamber, wherein the substrate is homogenized with the sample to form a test volume; and a working microelectrode configured to inject a current into the test volume that splits water in the test volume to generate hydrogen ions and/or hydroxide ions based on a reaction between the enzyme and the substrate;', 'a micro-pH-electrode configured to measure a pH of the test volume; and', 'a reference microelectrode; and', 'a main unit comprising a processor configured to adjust the injected current based on the pH of the test volume to ensure that the pH of the test volume remains constant and determine an activity of the enzyme in the test volume based on an amount the injected current is adjusted to ensure that the pH of the test volume remains constant., 'a device, configured to receive the slide, comprising2. The system of claim 1 , wherein the main unit further comprises a GUI to display the activity of the enzyme in the test sample.3. The system of claim 1 , wherein the activity of the enzyme in the test sample is determined by converting the current into moles per time via Faraday's ...

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Номер записи: 92
16-07-2015 дата публикации

DEVICE FOR PROVIDING A MEANS FOR INTERNAL CALIBRATION IN AN ELECTROCHEMICAL SENSOR

Номер: US20150198553A1
Автор: Duimstra Joseph A., Lee Eric, Leonard Lee, Wildgoose Gregory G.
Принадлежит: Senova Systems, Inc.

Internally calibrated pH and other analyte sensors based on redox agents provide more accurate results when the redox active reference agent is in a constant chemical environment, yet separated from the solution being analyzed in such a way as to maintain electrical contact with the sample. Room temperature ionic liquids (RTIL) can be used to achieve these results when used as a salt bridge between the reference material and the sample being analyzed. The RTIL provides the constant chemical environment and ionic strength for the redox active material (RAM) and provides an electrolytic layer that limits or eliminates direct chemical interaction with the sample. A broad range of RAMs can be employed in a variety of configurations in such “Analyte Insensitive Electrode” devices. 1. A multi-phase analyte insensitive electrode (AIE) for use in an electrochemical sensing device for measuring an analyte in a sample , the AIE comprising(a) an electrolytic layer;(b) an electrically conductive component electrically connected to the electrolytic layer;{'sub': 4', '6, '(c) a redox active material capable of being at least one of electrically oxidized and electrically reduced, the redox active material being dispersed in at least one of the electrolytic layer and the conductive component, the redox active material being selected from the group consisting of n-butyl-ferrocene, silver nanoparticle-coated glassy carbon, ferrocene, polylvinylferrocene, NiHCF, ferrocene styrene copolymers, ferrocene styrene cross-linked copolymers, Ni Cyclam, and KFe(CN), anthraquinone (AQ), anthracene, 9,10-phenanthrenequinone (PAQ), 1,4-benzoquinone, 1,2-benzoquinone, 1,4-napthaquinone, 1,2-napthaquinone, N,N′-diphenyl-p-phenylenediamine (DPPD), azo containing compounds, azobenzene and derivatives thereof, porphyrins and derivatives thereof, octaethylporphyrin, tetraphenylporphyrins, metalloporphyrins and derivatives thereof, hemin, iron octaethylprophyrin, iron tetraphenylporphyrin, and viologens ...

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Номер записи: 93
06-07-2017 дата публикации

Differential carbon dioxide sensor

Номер: US20170191954A1
Автор: Kalachar Haranahalli Chadimane Byrappachar, Nagabhushanam Gonuguntla, Ravi Kumar Meruva, Srirama Kumar Kasi
Принадлежит: Individual

The present disclosure describes a differential-type carbon dioxide sensor, which includes a pH-electrode, a bicarbonate electrode, and a chloride electrode, and a reference electrode, which is enclosed in a chamber. The pH electrode has a pH-sensitive membrane and the bicarbonate electrode has a bicarbonate-sensitive membrane, which comprises 30% by weight of a polymer matrix, 30% by weight of a carbonate or bicarbonate ion-selective material, 30% by weight of a plasticizer, and 10% by weight of a lipophilic additive based on total weight of the bicarbonate-sensitive membrane. Further, the chloride electrode has a membrane with no selectivity towards bicarbonate and towards salicylate, which is within a predetermined therapeutic range having a concentration of salicylate less than 1.5 mmol/L. The pH electrode, the bicarbonate electrode, and the chloride electrode operate in tandem with each other.

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Номер записи: 94
06-07-2017 дата публикации

REFERENCE ELECTRODE

Номер: US20170191960A1
Автор: ARIMOTO Kimihiko, KOMADA Yoshito, MINOWA Hiroki, Miyamura Kazuhiro, Mori Yoshihiro, Nakai Yoko, SEKO Tomoko, Tsujioka Yuiji
Принадлежит:

A reference electrode according to the present invention maintains continuity between an internal solution and measurement sample and measures the electrical potential of the measurement sample even if the measurement sample in a liquid junction of the reference electrode has air bubbles mixed therein. This reference electrode is provided with: a second body provided with a second internal solution chamber in which a second internal solution is housed and a liquid junction portion disposed in the second internal solution chamber such that the second internal solution and measurement sample that is to be measured come into contact; and an internal electrode disposed inside the second internal solution. The liquid junction portion is formed from a conduction component formed from a porous or fibrous component and an aperture adjacent to the conduction component. 1. A reference electrode comprising:a body having an internal solution chamber that holds an internal solution, and a liquid junction portion that is disposed in the internal solution chamber such that the internal solution and a measurement sample that is to be measured are in mutual contact; andan internal electrode that is disposed inside the internal solution chamber, whereinthe liquid junction portion is formed by a conduction component that is formed by a porous or fibrous component, and an aperture that is adjacent to the conduction component.2. The reference electrode according to claim 1 , wherein the conduction component is positioned such that the size of the aperture is larger than the size of minute holes formed in the conduction component.3. The reference electrode according to claim 1 , wherein an end portion of the conduction component that is in contact with the measurement sample is disposed such that this end portion is substantially flush with the aperture claim 1 , or such that this end portion protrudes onto the measurement sample side beyond the aperture.4. The reference electrode ...

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Номер записи: 95
20-06-2019 дата публикации

REFERENCE ELECTRODE

Номер: US20190187088A1
Автор: OKIHARA Masao
Принадлежит: LAPIS SEMICONDUCTOR CO., LTD.

A reference electrode is provided with an accommodation portion that is provided with a tube-shaped lead-out portion that can guide an accommodated internal liquid; a liquid junction portion that is connected to an end of the lead-out portion, and that allows the internal liquid to seep out; a liquid dripping portion that has a first end connected to the liquid junction portion, that has a second end that protrudes into the accommodation portion, and that guides the internal liquid to the liquid junction portion; and an internal electrode having at least a portion that is positioned further towards the first end side than the second end of the liquid dripping portion. 1. A reference electrode , comprising:an accommodation portion that is provided with a tube-shaped lead-out portion, and that can accommodate an internal liquid;a liquid junction portion that is connected to an end of the lead-out portion;a liquid dripping portion that has a first end connected to the liquid junction portion and that has a second end that protrudes into the accommodation portion; andan internal electrode having at least a portion that is positioned further towards a first end side than a second end of the liquid dripping portion.2. The reference electrode according to claim 1 ,wherein the lead-out portion has a jagged portion formed on a surface facing the liquid dripping portion that has been inserted into the lead-out portion.3. The reference electrode according to claim 1 ,wherein the liquid dripping portion is made of polypropylene.4. The reference electrode according to claim 1 ,wherein the second end of the liquid dripping portion is in contact with a wall surface of the accommodation portion.5. The reference electrode according to claim 1 ,wherein at least a portion of the liquid dripping portion extends along an inner wall of the accommodation portion.6. The reference electrode according to claim 5 ,wherein the internal electrode is in contact with the liquid dripping portion.7 ...

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Номер записи: 96
20-06-2019 дата публикации

METHOD FOR OPERATING AN AMPEROMETRIC SENSOR, AMPEROMETRIC SENSOR, AND METHOD FOR MONITORING A MEASURING FLUID IN A FLUID LINE NETWORK

Номер: US20190187089A1
Автор: Bondzio Lars, Hennings Erik, Jugert Stephan, Pfauch Thomas, Vettermann Jens
Принадлежит:

The present disclosure relates to a method for operating an amperometric sensor for detecting measured values of at least one first measurand that represents a concentration of a first analyte in a measuring fluid, and of at least one second measurand which represents a concentration of a second analyte different from the first analyte. The method includes steps of detecting measured values of the first measurand in a first operating mode of the amperometric sensor, switching the amperometric sensor to a second operating mode different from the first operating mode, and detecting measured values of the second measurand in the second operating mode of the amperometric sensor. The method can be used in monitoring the water quality in drinking water installations or drinking water networks. 1. A method for operating an amperometric sensor for detecting measured values of at least one first measurand that represents a concentration of a first analyte in a measuring fluid , and of at least one second measurand which represents a concentration of a second analyte different from the first analyte , wherein the method comprises:detecting measured values of the first measurand in a first operating mode of the amperometric sensor;switching the amperometric sensor to a second operating mode different from the first operating mode; anddetecting measured values of the second measurand in the second operating mode of the amperometric sensor.2. The method of claim 1 , wherein detecting measured values of the first measurand in the first operating mode comprises:applying a predetermined first voltage between a working electrode of the amperometric sensor and a counter electrode of the amperometric sensor, wherein the working electrode and the counter electrode contact an inner electrolyte separated from the measuring fluid via a membrane permeable to the first and second analytes;generating measurement signals representative of a current passing through the inner electrolyte at the ...

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Номер записи: 97
20-06-2019 дата публикации

Glass electrode

Номер: US20190187091A1
Автор: Matthaeus Speck, Thomas Wilhelm
Принадлежит: Endress and Hauser Conducta GmbH and Co KG

The present disclosure relates to a glass electrode including an analyte-sensitive glass membrane, an electrically conductive lead, and an intermediate layer which conductively connects the lead and the glass membrane to one another. According to the present disclosure, the intermediate layer is made of an electron- and/or ion-conducting polymer.

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Номер записи: 98
22-07-2021 дата публикации

Reference electrode using local environment ph control

Номер: US20210223197A1
Автор: Nathan Lawrence
Принадлежит: ANB Sensors Ltd

A reference system for an electrochemical or ion selective sensor where a reference electrode is coupled with a redox active species and the redox active species is configured to set a pH value of a local environment of a low buffer/low buffering capacity analyte media proximal to the reference electrode. The pH value of the low buffer/low buffering capacity proximal to the reference electrode may be controlled to a pH value at least one pH unit above or below pH 7. The voltammetric response of the redox active species is used as a reference and/or reference signal for the electrochemical or ion selective sensor.

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Номер записи: 99
14-07-2016 дата публикации

SENSORS INCORPORATING PALLADIUM ELECTRODES

Номер: US20160202202A1
Автор: Wu Yiliang
Принадлежит:

A pH sensor contains a potentiometric sensing electrode made of palladium. An optional metal oxide layer may be coated on the palladium electrode to enhance sensitivity. The pH sensor has high sensitivity, a shorter response time, and good reversibility and stability. 1. A pH sensor comprising:(a) a sensing electrode;(b) a counter electrode; and wherein the electrolyte layer is located between the sensing electrode and the counter electrode; and', 'wherein the sensing electrode comprises palladium formed by thermal decomposition of a palladium precursor composition., '(c) an electrolyte layer;'}2. The pH sensor of claim 1 , wherein the electrolyte layer is in physical contact with the sensing electrode and the counter electrode.3. The pH sensor of claim 1 , wherein the counter electrode comprises silver and silver chloride.4. The pH sensor of claim 1 , wherein the sensor has a sensitivity of at least 40 mV/pH.5. The pH sensor of claim 1 , wherein the sensor has a response time of no longer than 200 seconds.6. The pH sensor of claim 1 , wherein the sensor has a linearity of at least 95% in the pH range from 2 to 12.7. The pH sensor of claim 1 , wherein the sensor further comprises an insulator located adjacent to the electrolyte layer and between the sensing electrode and the counter electrode.8. The pH sensor of claim 1 , wherein the sensor further comprises a metal oxide layer located between the sensing electrode and the electrolyte layer.9. The pH sensor of claim 8 , wherein the metal oxide layer is one of TiO claim 8 , ZnO claim 8 , WO claim 8 , SnO claim 8 , RuO claim 8 , TaO claim 8 , PdO claim 8 , and IrO.10. A biomedical device comprising a pH sensor comprising:(a) a sensing electrode;(b) a counter electrode; and(c) an electrolyte layer;wherein the electrolyte layer is located between the sensing electrode and the counter electrode; andwherein the sensing electrode comprises palladium and palladium oxide.11. The biomedical device of claim 10 , wherein the ...

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Номер записи: 100