УСТРОЙСТВО КОНТРОЛЯ pH

... 1. Устройство (10, 11, 21, 31, 401) контроля pH, содержащее- камеру (107, 207, 307) для вмещения раствора,- полимер (105, 205, 305) погружаемый в раствор, причем размер полимера способен изменяться в зависимости от того, превышает ли pH раствора пороговое значение,- детектор (109, 209, 309) для обнаружения изменения размера полимера.2. Устройство контроля pH по п. 1, в котором изменение размера полимера соответствует полимеру, растворяемому раствором, причем указанный детектор содержит- источник (101) света для испускания светового пучка,- оптический датчик (103) для обнаружения светового пучка,причем полимер расположен между источником света и световым пучком так, что световой пучок блокируется полимером, и световой пучок может быть обнаружен оптическим датчиком, когда полимер растворяется.3. Устройство контроля pH по п. 1, в котором изменение размера полимера соответствует полимеру, набухающему под действием раствора, причем указанный детектор содержит- источник (101) света для испускания ...

Ausfallgesicherte ionenselektive Einrichtung

VERFAHREN UND ANORDNUNG ZUR BESTIMMUNG DER KONZENTRATION EINES ELEKTROLYTEN

Verfahren und Vorrichtung zur Überwachung einer elektrochemischen Halbzelle

Apparatus

pH measurement device

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

ANALYTICAL DEVICE

PROCEDURE AND DEVICE FOR THE PH MEASUREMENT.

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

pH indicator device and formulation

Disclosed herein are devices and methods for determining the pH of fluid. Example devices include a device comprising a surface configured to contact the fluid and a pH indicator covalently bound thereto, wherein the pH indicator has a first colour prior to contact with the fluid and changes colour as a function of the pH of the fluid.

In-line sensor validation system

Disclosed is a food wash sensor system that includes a sensor disposed along a fluid flow path that can circulate a wash fluid through the food wash sensor system. The sensor can detect a concentration of an analyte in the wash fluid. The system also includes a reference fluid reservoir including a reference fluid, the reference fluid including a predetermined concentration of the analyte in solution, a delivery system fluidly coupled to the fluid flow path and operable to supply the reference fluid to the fluid flow path upstream from the sensor while maintaining the sensor in place along the fluid flow path, and a control and monitoring system configured to receive a signal from the sensor, the signal indicating the concentration of the analyte in the reference fluid at a first time, and control calibrating the sensor and validating the sensor over time based on the received signal.

METHOD OF MEASURING WITH REDOX- OR ION-SENSITIVE ELECTRODES

To compensate for the zero-point changes in continuous measuring procedures with redox- or ion-sensitive electrodes a partial flow is branched off from the system to be measured and the potentiometric measurement is so carried out therein that on measuring potentiometrically the instantaneous concentration of the ions to be determined the zero point is newly determined by complete reaction of this ion type with a suitable reagent. The two measurements are suitably carried out by inserting a cycle-control device.

SELF-CALIBRATING SINGLE-USE SENSING DEVICE FOR CLINICAL CHEMISTRY ANALYZER

ONLINE REFERENCE CALIBRATION

An online calibration system for an electrochemical sensor. The calibration system comprises a calibration electrode coupled with a redox species, where the redox species is configured to control a pH of a reference solution local to the calibration electrode, such that when a voltammetric signal is applied to the calibration electrode the output generated from the calibration system is determined by the local environment pH. The output signal from the calibration system is used to calibrate a reference potential generated by a reference system of the electrochemical sensor to correct for drift in the reference potential when the electrochemical sensor is being used. The calibration electrode may be disposed in a reference cell of the electrochemical sensor.

APPARATUS AMD METHOD FOR COMPENSATING PH MEASUREMENT ERRORS DUE TO PRESSURE AND PHYSICAL STRESSES

A pH sensing apparatus includes an ion-sensing cell that includes a first half-cell including a first Ion-Sensitive Field Effect Transistor (ISFET) exposed to a surrounding solution; and a second reference half-cell exposed to the surrounding solution. The pH sensing apparatus further includes a pressure sensitivity compensation loop including a Non Ion-Sensitive Field Effect Transistor (NISFET). The pH sensing apparatus is configured to compensate for at least one of pressure and physical stresses using signals from the ion-sensing cell and feedback from the pressure sensitivity compensation loop. The pH sensing cell further includes a processing device configured to calculate a final pH reading compensated to minimize the at least one of pressure and physical stresses.

SELF DIAGNOSTIC PH SENSOR

An apparatus and method for measuring potentiometric electrode impedance for diagnostic purpose while continuously reading the results of the process value. A square wave is applied to an external circuit, which in turn is coupled to an electrode assembly output through a capacitor. The output of the electrode is converted into a pulse width modulated signal and sampled. These sampled values are used to calculate the impedance and process output value.

STERILE LOOP CALIBRATION SYSTEM

... 44941 CAN 9A An endless path calibration system comprising a sensor cassette having a flow-through passage and at least one sensor to be calibrated, a chamber coupled to the sensor cassette to define an endless path and a sterile calibration liquid in the endless path. A gas injection passage for injecting gas into the sterile calibration liquid and a gas vent leading from the endless path to the exterior of the endless path. A check valve allows gas to escape from the endless path and substantially prevents gas and liquid from entering the endless path through the gas vent.

Verfahren zur Herstellung einer Lösung, die einen bestimmten Partialdruck an gelöstem Kohlendioxyd aufweist

Measuring device for measuring physical or electrochemical quantities

The measuring apparatus, for example a pH meter, contains a reference voltage source from which a comparison voltage is tapped off in a suitable switch position of an operating switch (1-2) and fed to the indicating instrument (9). This comparison voltage can also be applied via a socket (2) to an external control circuit in order to influence the latter in the same way as if the measuring instrument had received a suitable input signal from a detecting element. ...

PROCEDURE FOR THE MEASUREMENT WITH REDOX OR IONENSENSITIVEN ELECTRODES.

VERFAHREN UND VORRICHTUNG ZUM PROGRAMMIEREN VON MESSGERAETEN UND REGLERN.

The measuring apparatus for the potentiometry and conductometry require the adjustment of the different parameters in order to adapt the measuring equipment to any given conditions. While in known apparatus said adjustment of parameters was carried out without any visible indication and the user did not know with certainty whether the desired adjustment was really effected, there are provided in the present device control keys (11, 12, 13) for three main functions, three additional keys (14, 15, 16) for auxiliary functions and two scroll keys (17, 18) for the stepping selection of subfunctions. A display field displays an alphanumerical indication which continuously indicates the actual program step as well as the numerical values involved at that time in order to enable the operator to monitor at any time the accuracy and practicality of the selected parameters.

PROCEDURE AND DEVICE FOR THE MEASUREMENT OF SMALL VALUES OF ACTIVITY OF IONS OF A SAMPLE STREAM IN AN AUTOMATIC ANALYZER.

PROCEDURE FOR THE SEQUENTIAL MONITORING OF AN ELECTRODE SYSTEM FOR POTENTIOMETRIC MEASUREMENTS.

MEASURING INSTRUMENT WITH A MAINTENANCE MECHANISM FOR AT LEAST PARTIAL THE AUTOMATIC CLEANING AND CALIBRATION OF A SENSOR PROBE.

FILTER FOR CHEMICAL EQUIPMENTS AND USE OF THE FILTER IN A CHEMICAL AUTOMATIC ANALYZER.

Standard solution for pH electrode calibration has a carbon dioxide partial pressure corresponding to that in ambient air

Standard solutions for pH electrode calibration, producing a carbon dioxide partial pressure corresponding to that in the ambient air, are new. Preferred Features: The solutions contain certain quantities of carbonate and bicarbonate for fixing the carbon dioxide partial pressure.

Procedure for the operation of a measuring point and measuring point.

Ein Verfahren zum Betreiben einer Messstelle (101) zum Bestimmen mindestens einer Messgrösse eines Mediums, wobei die Messstelle eine Basiseinheit (3) umfasst, die lösbar mit einer Sensoreinheit (2.j) verbunden ist, und die zur Kommunikation eines den Wert der Messgrösse repräsentierenden Signals an eine Prozessüberwachungsanlage vorgesehen ist, umfassend mindestens die Schritte: (a) Mindestens einmaliges Erfassen und Speichern eines in der Sensoreinheit gespeicherten oder von der Sensoreinheit erzeugten Wertes eines Diagnoseparameters in einer ersten Datenspeichereinheit der Basiseinheit; (b) Anhand des mindestens einen in der ersten Datenspeichereinheit gespeicherten Wertes des Diagnoseparameters Anpassen eines in einer zweiten Datenspeichereinheit der Basiseinheit hinterlegten Prognosewertes oder Prognoseintervalls und Hinterlegen des angepassten Prognosewertes oder Prognoseintervalls in der zweiten Datenspeichereinheit der Basiseinheit anstelle des bisher hinterlegten Prognosewerts ...

Kalibrations-Referenzelement für PH-Messgeräte, Kalibrations-Referenzsystem, Halter für ein Kalibrations-Referenzelement, sowie Verfahren zur Kalibration eines PH-Messgeräts.

Ein Kalibrations-Referenzelement (10) für pH-Messgeräte umfasst eine Referenzflüssigkeit (17) mit einem definierten pH-Wert sowie einen Schlauchbeutel (1), der die Referenzflüssigkeit einschliesst. Der Schlauchbeutel besteht aus einer Folie, die entlang höchstens drei Verschlusskanten (11, 12, 13) verschlossen ist. Ein Kalibrations-Referenzsystem umfasst mindestens zwei derartige Kalibrations-Referenzelemente (10) mit Referenzflüssigkeiten mit unterschiedlichem pH-Werten. Der Halter (2) für ein Kalibrations-Referenzelement erlaubt es, dieses derart aufzustellen, dass die Referenzflüssigkeit für eine Kalibrierung komfortabel zur Verfügung steht. Entsprechend umfasst ein Kalibrations-Set den Halter und Kalibrations-Referenzelemente (10) oder ein Kalibrations-Referenzsystem ...

Method for start-up of a measuring device

METHOD AND APPARATUS FOR DETECTING BROKEN PH SENSOR

Calibrating instrument for measuring ion concn. of surface water etc. - by comparison with standard reference data entered in microprocessor file

PROCESS FOR the METROLOGICAL RECORDING OF PHYSICAL VALUES OF LIQUIDS AND DEVICE FOR ITS EXECUTION

Apparatus for measuring pH and method for measuring pH using the same

NUTRIENT SUPPLY CONTROL SYSTEM BASED ON WATER CONTENT OF PLANT GROWING MEDIUM AND WEIGHT OF PLANT

The present invention relates to a nutrient supply control system based on the water content of a plant growing medium and the weight of plants. The present invention comprises: a measuring device for transmitting the measurement information of each sensor, which includes a first water flow sensor for measuring the supplied amount of nutrient injected from a medium, in which plants were bedded, a medium water content percentage sensor for measuring the water content of the medium, a weight sensor for measuring the weight of the medium, in which plants are bedded, and a second water flow sensor for measuring the amount of nutrient discharged from the medium; and a control device for calculating the amount of nutrient absorbed by plants according to measurement information from the measuring device and calculating the weight of the plants to adjust the composition, injection time, injection speed and amount of nutrients supplied to the medium. By doing so, it is possible to automatically ...

Sensor with memory storing calibration information

A sensor is configured to sense a parameter of an aqueous liquid. The sensor has an analog output port configured to provide an analog signal indicative of a sensed parameter, and a calibration memory device storing individual digital information indicative of a calibration of the sensor. A digital output port provides a digital signal indicative of the digital information. A treatment system and method is matched to the sensor.

CALIBRATION ELECTRODE

A calibration electrode for calibrating a reference system of an electrochemical sensor, such as a potentiometric sensor or an ion selective electrode. The calibration electrode has an active surface comprising redox functionalities. The redox functionalities set the pH of a reference solution proximal to the calibration electrode. A voltammetric signal is applied to the calibration electrode to produce a response that is determined by the set pH. The response of the calibration electrode to the voltammetric signal is used to calibrate/adjust a reference potential produced by a reference electrode of the reference system of the electrochemical sensor. This calibration corrects the detrimental effect of reference electrode drift.

SENSOR CLEANING AND CALIBRATION DEVICES AND SYSTEMS

METHOD AND APPARATUS FOR CALIBRATING MEASURING DEVICE

PURPOSE: To prevent a measurement part to be calibrated from being dried by mixing a water-based primary solution with two storage stabilities at a specific ratio directly before calibration. CONSTITUTION: When calibrating a measuring device 1 using a calibration means 5, primary solutions A and B are fed to a mixing room 12 from storage containers 6 and 7 via hose parts 8 and 9 as a means 11 for feeding a proper amount by a hose pump 10 and are mixed by a mixing means 12' being provided there when needed. The mixed body reaches individual measurement electrodes 2-4 of the measurement part 1 via a hose part 13. At this time, a required mixing ratio is given by sections d1 and d2, thus preventing measurement electrodes 2-4 of the measurement part 1 to be calibrated from being dried. COPYRIGHT: (C)1989,JPO ...

pH Sensor and Calibration method

A pH sensor 10 for measuring pH levels within a measurement environment comprises reference electrode 40, pH sensitive electrode 30, and a controller for measuring the potential difference between the pH electrode and the reference electrode, the measured potential difference indicating pH level at the pH electrode. The controller is operable to apply a calibration voltage across first and second electrodes 50, 60 to control the pH level at the pH sensitive electrode, and to measure the potential difference between the pH sensitive electrode and the reference electrode following the application of the recalibration voltage. Recalibration of the pH sensor is possible within the measurement environment. One or both of the electrodes 50, 60 may be the pH electrode and reference electrode. The sensor may be combined with a dissolved oxygen sensor where one of the first and second electrodes are used as a working electrode.

MAINTENANCE DEVICE FOR AT LEAST PARTIALLY AUTOMATIC CLEANING AND CALIBRATION OF A SENSOR PROBE

Smart medical/pharmaceutical sensor

pH measurement device

A fluid sampling element for receiving a fluid sample, comprising a pH sensor element 118 adapted to measure pH of the fluid sample and a reference sensor element 126. The pH sensor element and the reference sensor element are adapted to generate a potential difference between each other based on the pH of the fluid sample. The pH of the fluid sample can be measured and the fluid sampling element may then be readily disposed of. The fluid sampling element may comprise a cavity and may take the form of a pipette tip.

ELECTRODE CALIBRATION

Method and apparatus for testing ion selective electrodes in continuous measuring systems

The membrane of an ion selective electrode is tested for damage while it is being used for continuous measurement by sending a test current through the electrode system and measuring the voltage change produced. If the voltage change does not reach the value expected with an intact high resistance electrode, a defective electrode is indicated. A reverse current of the same magnitude and duration is then sent through the electrode system.

Method and means for electrode calibration

An electrode calibration apparatus which automatically calibrates a sensing electrode by providing a flow sensitive valve member which seals off flow of calibrating solution to the electrode during flow of a test solution past the electrode, but which permits calibrating solution to contact the electrode when the flow of test solution is interrupted.

PLUG-IN MODULE FOR A LIQUID OR A GAS SENSOR WITH GALVANICALLY DECOUPLED TRANSMISSION CIRCUIT

VERFAHREN ZUM KALIBRIEREN EINES MESSGERAETES UND ANORDNUNG ZUR DURCHFUEHRUNG DES VERFAHRENS

VERFAHREN ZUR BESTIMMUNG EINER PHYSIKALISCHEN ODER CHEMISCHEN MESSGROESSE

PROCEDURE AND DEVICE FOR THE MONITORING OF AN ELECTRO-CHEMICAL HALF CELL

VERFAHREN ZUR KALIBRIERUNG EINES PH-MESSELEMENTES

ANALYTICAL DEVICE FOR THE MEASUREMENT OF LIQUID OR GASEOUS ONES SAMPLES

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

PROCEDURE AND DEVICE FOR THE DETERMINATION OF THE CONDITION OF A MEASURING PROBE

METHOD FOR TESTING THE REACTIVITY OF A CHEMICAL SENSOR AND DEVICE FOR CARRYING OUT SAID METHOD

Identification of calibration deviations of pH-measuring devices

The invention relates to a comparison unit (130) configured for determining if a first pH measuring device of a first tank (104; 106) is affected by a pH-measuring problem, the comparison unit being configured for: - receiving a first CO2 concentration and a first pH value, the first CO2 concentration being a CO2 concentration of a first gas volume above a medium in a first tank, the first CO2 concentration and the first pH value being measured at a first time when the medium in the first tank is in pH-CO2 equilibrium state with the first gas volume and before said equilibrium state is modified by the metabolism of a cell culture in the first tank, the first pH value being a measured value provided by a first pH measuring device operatively coupled to the first tank (102); - receiving a second CO2 concentration and a second pH value, the second CO2 concentration being a CO2 concentration of a second gas volume above a medium in a second tank, the second CO2 concentration and the second ...

In-line sensor validation system

Disclosed is a food wash sensor system that includes a sensor disposed along a fluid flow path that can circulate a wash fluid through the food wash sensor system. The sensor can detect a concentration of an analyte in the wash fluid. The system also includes a reference fluid reservoir including a reference fluid, the reference fluid including a predetermined concentration of the analyte in solution, a delivery system fluidly coupled to the fluid flow path and operable to supply the reference fluid to the fluid flow path upstream from the sensor while maintaining the sensor in place along the fluid flow path, and a control and monitoring system configured to receive a signal from the sensor, the signal indicating the concentration of the analyte in the reference fluid at a first time, and control calibrating the sensor and validating the sensor over time based on the received signal.

REFERENCE LIQUID COMPRISING CSCL

REFERENCE LIQUID COMPRISING CsCl There is disclosed a reference liquid for use with a) a sample liquid to determine ionic activity of analytes, using differential analysis, and b) two substantially identical dry-operative, ion-selective electrodes, the reference liquid comprising a solution mixture of 1) CsCl, and 2) an anion suitable for poising one of the electrodes for the analysis of the activity of CO2. A method of use is also described.

ION ANALYZER CALIBRATION CELL

Abstract of the Disclosure Apparatus for calibrating an ion analyzer comprises a calibration cell having defined therein a first volume for measuring an ion concentration of a sample when the instrument is operated in a monitoring and a second volume for measuring the ion concentration when the instrument is operated in a calibration mode. The first volume is included in, and forms part of, the second volume so that the matrix for the calibration measurement is essentially identical to that for the sample measurement, A double known-addition is used during the calibration mode to determine the calibration parameters.

SEMICONDUCTOR ELECTROCHEMICAL SENSORS

Described herein are substrates, sensors and systems related to measuring the concentration of an analyte such as hydrogen ion in a sample. Redox act ive moieties whose reduction and/or oxidation potentials are sensitive to th e presence of an analyte are immobilized onto a semiconductor surface. Immob ilized redox active moieties whose reduction and/or oxidation potential are insensitive to the analyte can be used for reference. Voltammetric measureme nts made using such modified semiconductor surfaces can accurately determine the presence and/or concentrations of analytes in a sample of interest. The semiconductor electrochemical sensors of the invention are robust and can b e made so as not to require calibration or re-calibration.

ELECTRODE CALIBRATION

... 2106666 9217775 PCTABS00016 An electro-analytical sensing instrument such as a pH meter has a sensing electrode which is placed in an electrolyte and voltages are read out in order to measure the properties of the electrolyte such as pH. The present invention enables an electrode assembly to be calibrated at one site and used at other sites and with other instruments without the need for re-calibration. This is achieved by providing a calibration unit including a memory which is kept as part of the electrode assembly for use at other sites. Various electrode assemblies to which the invention can be applied are described.

SAFE FAILURE ION SELECTIVE COMBINATION ELECTRODE

AGGLUTINATION ELEMENT IN ELECTRODE FOR MEASURING ION

DEVICE AND PROCESS OF CONTROLS OF the INTEGRITY OF the ELECTRODES Of a POTENTIOMETRIC SYSTEM OF MEASUREMENT

FUNCTIONING PROCESS OF CHECKING Of ELECTRODES OF SELECTION Of IONS IN the SYSTEMS OF MEASUREMENT Uninterrupted

METHOD FOR MEASURING ION CONCENTRATION AND CALIBRATING SHEET MEASURING DEVICE

Characteristics are measured of a sample based on its electrical properties. Firstly, an easily absorbing soln. material is impregnated with the sample which is obtd. from an object to be measured. The soln. material is chemically stabilized, flexible and emanates no interferential ingredient against the object to be measured. Finally, the soln. material is physically contacted with a measuring portion of a sheet-type ion-concn. device (I) for measuring the characteristics. Device (I) has an electrode which is formed in part by an ion-responsive membrane, and also has a reference electrode. Both electrodes lie in the same plane for placement of the soln. material between them. Copyright 1997 KIPO ...

금속 내부에 대한 침입 수소량의 측정 장치

... 환경의 온도 변화에 수반하는 애노드측의 잔여 전류의 변화를 고려한 후, 부식에 수반하여 금속 내부에 침입하는 수소량을 정확하게 계측할 수 있는 측정 장치를 제공하는 것을 과제로 한다. 금속 재료로 이루어지는 피검체의 일방의 면을 부식 환경에 노출시켜 부식 반응에 의해 발생하는 수소의 침입면, 타방의 면을 수소 검출면으로 할 때, 그 수소 검출면측에 복수의 셀군으로 구성된 전기 화학 셀을 형성하고, 그 셀군의 개개의 셀의 내부에 pH 가 9 ∼ 13 인 전해질 수용액을 충전함과 함께, 각각 독립된 참조 전극과 대극을 설치하고, 그 셀군 중 적어도 하나의 셀을 잔여 전류를 보정하기 위한 기준 셀로 하고, 그 기준 셀의 수소 검출 영역에 대응하는 수소 침입면측의 영역에 부식 환경과의 접촉을 차단하기 위한 보호막을 형성하고, 그 기준 셀 이외의 셀에서 검출된 애노드 전류값을 그 기준 셀에서 검출된 잔여 전류값에 의해 보정하고, 이 보정된 애노드 전류값에 기초하여 부식면측으로부터의 침입 수소량을 산출한다.

Electrochemical sensing apparatus with in situ calibration

An in vivo electrochemical monitoring device is formed by a catheter-like member which terminates in a closed end having a wall with a fixed opening to admit fluid to be tested, such as blood in an artery. An electrochemical sensor, such as an ISFET device for monitoring the concentration of a particular ion in blood, is mounted inside the tube at a fixed location below the opening preferably a larger sensing chamber. an infusion channel in the tube is arranged to flood the sensor with a fluid of known chemical properties so that the sensor output can be calibrated. Under pressure the calibration fluid expels the test fluid out of the tube or chamber via the fixed opening. A method of constructing a suitable chamber on an ISFET wafer is also disclosed.

Drift calibration method and device for the potentiometric sensor

The present invention discloses a method and an apparatus of the drift calibration of sensors. The method includes shifting the sensing signal and differential technology to remove the drift signal by time during a long measuring. The apparatus includes two voltage sensors and readout circuits, a signal-shifting circuit and a differential circuit, and the apparatus is used for outputting the response signal without time drifting.

Characterization and failure analysis of a sensor using impedance frequency response spectra

According to at least one aspect of the present disclosure, a method includes applying an alternating current having a frequency at a selected voltage to a sensor, wherein the voltage is applied between a reference electrode and a working electrode of the sensor, varying the frequency of the alternating current between a lower frequency and an upper frequency, measuring an impedance of the sensor between the reference electrode and the working electrode as a function of the frequency of the alternating current, analyzing the measured impedance to determine a total impedance of the sensor and the real and imaginary components of the total impedance at each applied frequency of the alternating current, and characterizing the sensor based on the total impedance at the low frequency end of the sensor and on the real and imaginary components of the total impedances.

Adjustment of a pH electrode carbon region

An embodiment provides a method for modifying a carbon region on a boron-doped diamond electrode surface, comprising: placing a boron-doped diamond electrode surface in an aqueous solution, wherein the aqueous solution comprises an ionic treatment solution; applying a voltage difference across the boron-doped diamond electrode surface; and modifying a carbon region on an area of the boron-doped diamond electrode surface, wherein the modifying is responsive to application of the voltage while the boron-doped diamond electrode surface is in the aqueous solution, wherein the modification continues until a desired signal of the carbon region is reached. Other aspects are described and claimed.

УСТРОЙСТВО КОНТРОЛЯ pH

Использование: для контроля значения pH раствора. Сущность изобретения заключается в том, что устройство контроля pH содержит камеру для вмещения раствора, полимер, погружаемый в раствор, причем размер полимера способен изменяться в зависимости от того, превышает ли pH раствора пороговое значение, детектор для обнаружения изменения размера полимера. Технический результат: обеспечение возможности упрощения измерения pH раствора. 4 н. и 9 з.п. ф-лы, 8 ил.

УСТРОЙСТВО ДЛЯ ОПРЕДЕЛЕНИЯ рН И СОСТАВ

PH or redox measurement transducer tester - uses second, monitoring transducer with immersion bell contg. electrodes and diaphragm

An arrangement for testing a pH or redox measurement transducer (22) forming part of a continuous process contains a second or monitor measurement transducer (23) in the processing system with an immersion bell (29) open to the measurement medium. The bell contains the components necessary for measurement, i.e. electrodes (30) and a diaphragm (31). An evacuable stand pipe (35) and a pressure line (32) are connected to the bell. The pressure line is connected to a pressure source to form and maintain a gas cushion in the bell. USE/ADVANTAGE - Transducer can be tested during operation at min. cost.

Verfahren zur Funktionsüberwachung eines Sensors

Die Erfindung betrifft ein Verfahren zur Funktionsüberwachung eines Sensors, umfassend:- Kalibrieren des Sensors, wobei Kalibrierwerte (3) mindestens eines der Kalibrierparameter ermittelt und gespeichert werden,- Wiederholen der Kalibrierung bis ein Trend der Kalibrierwerte (3) des mindestens einen Kalibrierparameters erkennbar ist,- Ermitteln einer Trendlinie (1) aus den Kalibrierwerten (3) des mindestens einen Kalibrierparameters,- Kalibrieren des Sensors, in dem eines anhand der Trendlinie abgeschätzten Kalibrierwertes als einen theoretischen Kalibrierwert des mindestens einen Kalibrierparameters herangezogen wird.

A computer device for acting as a meter

A computer device 10 for acting as a meter comprises a sensor input 11 for inputting data from a sensor 12, a store, and a data output 14. The device is arranged to provide measurement data from the sensor input over time. The store is arranged to store the measurements and to store measurement configuration data. The device is arranged to configure the measurements based on the configuration data to form configured data and to output this from the data output. The device also comprises an information input for inputting information that affects the sensor data in the form of a camera 30. The device is arranged such that measurements are associated with the information input at the camera 30. The computer may be a smartphone and the configuration data or information input may be calibration data, a barcode or QR code.

SUSTAINED-RELEASE PHARMACEUTICAL FORMS COMPRISING WATER-SOLUBLE GLASS BODIES

COMPENSATING FOR ZERO-POINT DRIFTS IN A MEASURING PROCESS USING REDOX OR ION-SENSITIVE ELECTRODES

VERFAHREN ZUM KALIBRIEREN EINES MESSGERAETES UND ANORDNUNG ZUR DURCHFUEHRUNG DES VERFAHRENS

VERFAHREN ZUR KALIBRIERUNG EINES PH-MESSELEMENTES

Electrochemical sensors

Described herein are substrates, sensors and systems related to measuring the concentration of an analyte such as hydrogen ion in a sample. Redox active moieties whose reduction and/or oxidation potentials are sensitive to the presence of an analyte are immobilized onto a surface of an electrode. Immobilized redox active moieties whose reduction and/or oxidation potential are insensitive to the analyte can be used for reference. Voltammetric measurements made using such modified surfaces can accurately determine the presence and/or concentrations of analytes in a sample of interest. The electrochemical sensors of the invention are robust and can be made so as not to require calibration or recalibration.

Ph monitoring device

The invention proposes a pH monitoring device 10 comprising a chamber 107 for containing a solution; a polymer 105 being immersed in the solution, wherein the physical state of the polymer is changeable in dependence on whether the pH of the solution exceeds a threshold value; and a detector 109 for detecting the change of the physical state of the polymer.

PH VALUE MEASURING DEVICE COMPRISING IN SITU CALIBRATION MEANS

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 ...

METHOD FOR OPERATING A MEASUREMENT SITE, AND MEASUREMENT SITE

The present disclosure relates to a method for operating a measurement site for determining at least one measurand of a medium, wherein the measurement site has at least one sensor unit, in contact with the medium, for detecting measured values, and an operating unit with a display element, wherein the sensor unit is connected wirelessly or by wire to the operating unit for communication, wherein the method includes the steps of determining a first value that represents a remaining time span up to a specified time point for a maintenance measure to be performed on the sensor unit; determining a second value that represents a current state of the sensor unit; determining a third value, based at least upon the first and second values, that represents a recommended action with regard to the sensor unit; and displaying the third value or a symbol derived therefrom, or a signal derived from the third value, by means of the display element. 1. A method for operating a measurement site , comprising:providing a measurement site including a sensor unit embodied to contact a medium and to detect measured values, the measurement site further including an operating unit having a display element, wherein the sensor unit is connected wirelessly or by wire to the operating unit for communication;determining a first value representing a remaining time span up to a specified time point for a maintenance measure to be performed on the sensor unit;determining a second value representing a current state of the sensor unit;determining a third value based at least upon the first value and the second value and representing a recommended action with regard to the sensor unit; anddisplaying the third value, a symbol derived from the third value, or a signal derived from the third value using the display element.2. The method according to claim 1 , wherein the steps of determining the first value claim 1 , and/or the second value claim 1 , and/or the third value are performed by the ...

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

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.

APPARATUS AND METHOD FOR COMPENSATING pH MEASUREMENT ERRORS DUE TO PRESSURE AND PHYSICAL STRESSES

A pH sensing apparatus includes an ion-sensing cell that includes a first half-cell including a first Ion-Sensitive Field Effect Transistor (ISFET) exposed to a surrounding solution; and a second reference half-cell exposed to the surrounding solution. The pH sensing apparatus further includes a pressure sensitivity compensation loop including a Non Ion-Sensitive Field Effect Transistor (NISFET). The pH sensing apparatus is configured to compensate for at least one of pressure and physical stresses using signals from the ion-sensing cell and feedback from the pressure sensitivity compensation loop. The pH sensing cell further includes a processing device configured to calculate a final pH reading compensated to minimize the at least one of pressure and physical stresses.

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

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.

METHODS TO AUTOMATICALLY CALIBRATE PH SENSORS WITHOUT SAMPLING

Methods of calibrating a pH sensor fixed within an enclosed vessel are disclosed. The methods include introducing a buffer into the enclosed vessel, introducing a gas mixture comprising COinto the enclosed vessel, measuring a pH signal of the solution, measuring a COconcentration of a headspace gas of the solution, and calculating a pH value with a buffer calibration curve. The methods include calculating a calibration parameter with a sensor calibration curve and calibrating the pH sensor with the calibration parameter. Reactor systems are also disclosed. The systems include an enclosed reactor, a pH sensor, a COsensor, a temperature control subsystem, and a controller. Methods of facilitating pH sensor calibration without sampling in a bioreactor system are also disclosed. The methods include providing a controller and providing instructions to operably connect the controller to the pH sensor and the COsensor. 1. A method of calibrating a pH sensor fixed within an enclosed vessel , comprising:introducing a buffer into the enclosed vessel at a controlled temperature;{'sub': 2', '2, 'sequentially introducing a gas mixture comprising COinto the enclosed vessel to form gas mixture and buffer solutions having variable concentrations of CO;'}{'sub': '2', 'measuring a pH signal of each solution with the pH sensor and a COconcentration of a headspace gas of each solution;'}{'sub': '2', 'calculating a pH value for each solution from the COconcentration with a calibration curve for the buffer;'}calculating a calibration parameter for the pH sensor from the pH signal and the respective pH value for each solution with a calibration curve for the pH sensor; andcalibrating the pH sensor with the calibration parameter.2. The method of claim 1 , comprising measuring a pH signal of at least four solutions and a COconcentration of the headspace gas of the at least four solutions claim 1 , calculating at least four respective pH values claim 1 , and calculating the calibration ...

PORTABLE SENSOR VALIDATION SYSTEM

A food wash reference fluid delivery apparatus includes a portable reference fluid reservoir comprising an inlet and an outlet and configured to store a reference fluid that includes a predetermined concentration of an analyte, a pump fluidly coupled to the outlet of the portable reference fluid reservoir and configured to pump the reference fluid from the outlet of the portable reference fluid reservoir, a sensor connector configured to fluidly couple with a sensor positioned along a fluid flow path of the food wash system, a sensor fluid line configured to provide the reference fluid from the pump to the sensor connector, an inlet fluid line configured to provide the reference fluid from the pump to the inlet of the portable reference fluid reservoir, and a valve configured to adjustably control a fluid flow rate of the reference fluid through the sensor fluid line and the inlet fluid line. 1. A portable food wash reference fluid delivery apparatus comprising:a portable reference fluid reservoir comprising an inlet and an outlet and configured to store a reference fluid that includes a predetermined concentration of an analyte;a pump fluidly coupled to the outlet of the portable reference fluid reservoir and configured to pump the reference fluid from the outlet of the portable reference fluid reservoir;a portable power source coupled to the pump and configured to provide power to operate the pump;a sensor connector configured to fluidly couple with a sensor positioned along a fluid flow path of a food wash system;at least one valve configured to adjustably control a fluid flow rate of the reference fluid;a first fluid line fluidly coupled between the pump and the valve; anda second fluid line fluidly coupled between the valve and the sensor connector.2. The portable food wash reference fluid delivery apparatus of claim 1 , further comprising one or more straps connected to the portable reference fluid reservoir and configured to lift and support the portable ...

SINGLE-USE pH SENSOR STORAGE SOLUTION

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 ...

IN-LINE SENSOR VALIDATION SYSTEM

Disclosed is a food wash sensor system that includes a sensor disposed along a fluid flow path that can circulate a wash fluid through the food wash sensor system. The sensor can detect a concentration of an analyte in the wash fluid. The system also includes a reference fluid reservoir including a reference fluid, the reference fluid including a predetermined concentration of the analyte in solution, a delivery system fluidly coupled to the fluid flow path and operable to supply the reference fluid to the fluid flow path upstream from the sensor while maintaining the sensor in place along the fluid flow path, and a control and monitoring system configured to receive a signal from the sensor, the signal indicating the concentration of the analyte in the reference fluid at a first time, and control calibrating the sensor and validating the sensor over time based on the received signal. 1. A food wash reference fluid delivery apparatus comprising:a mobile frame;a reference fluid reservoir positioned on and configured to be removable from the mobile frame, the reference fluid reservoir configured to contain a reference fluid with a predetermined concentration of an analyte;a coupler configured to fluidly couple with a sensor of a food wash system; and a sensor fluid line configured to provide the reference fluid to the coupler;', 'a pump configured to pump the reference fluid from the reference fluid reservoir to the sensor fluid line; and', 'a valve configured to control a fluid volumetric flow rate of the reference fluid through the sensor fluid line., 'a delivery assembly positioned on the mobile frame, the delivery assembly comprising2. The food wash reference fluid delivery apparatus of claim 1 , wherein the coupler comprises a quick connect coupler configured to removably fluidly couple with the sensor.3. The food wash reference fluid delivery apparatus of claim 1 , wherein the delivery assembly further comprises a return fluid line configured to provide the ...

pH METER

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

CHARACTERIZATION AND FAILURE ANALYSIS OF A SENSOR USING IMPEDANCE FREQUENCY RESPONSE SPECTRA

According to at least one aspect of the present disclosure, a method includes applying an alternating current having a frequency at a selected voltage to a sensor, wherein the voltage is applied between a reference electrode and a working electrode of the sensor, varying the frequency of the alternating current between a lower frequency and an upper frequency, measuring an impedance of the sensor between the reference electrode and the working electrode as a function of the frequency of the alternating current, analyzing the measured impedance to determine a total impedance of the sensor and the real and imaginary components of the total impedance at each applied frequency of the alternating current, and characterizing the sensor based on the total impedance at the low frequency end of the sensor and on the real and imaginary components of the total impedances. 1. A method of characterization and failure analysis of a measuring sensor , the method comprising:applying an alternating current having a frequency at a selected voltage to a sensor, wherein the voltage is applied between a reference electrode and a working electrode of the sensor;varying the frequency of the alternating current between a lower frequency and an upper frequency over a range having a low frequency end and an upper frequency end;measuring an impedance of the sensor between the reference electrode and the working electrode over the range of frequencies of the alternating current;analyzing the measured impedance to determine one or more total impedance of the sensor and the real and imaginary components of the one or more total impedance at and over the applied frequencies of the alternating current; andcharacterizing the sensor based on the one or more total impedance and on the real and imaginary components of the one or more total impedance.2. The method of claim 1 , the method further comprising generating a measured impedance frequency response spectrum.3. The method of claim 1 , wherein ...

Measurement device with automated calibration

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 ...

PREDICTIVE LIFESPAN OF ANALYTICAL SENSORS

A process analytic system includes an analytic sensor configured to sense a characteristic of a fluid. The process analytic system also includes measurement circuitry coupled to the analytic sensor and configured to generate an indication of the characteristic of the fluid. The process analytic system includes a processor coupled to the measurement circuitry and configured to receive the indication of the characteristic of the fluid and calculate a sensor-related output based on the indication of the characteristic of the fluid. In addition, the process analytic system includes a diagnostics component configured to determine a rate of degradation of the analytic sensor based on the sensor-related output and a reference value, wherein the rate of degradation is compared to a pre-selected threshold. 1. A process analytic system comprising:an analytic sensor configured to sense a characteristic of a fluid;measurement circuitry coupled to the analytic sensor configured to generate an indication of the characteristic of a fluid;a processor coupled to the measurement circuitry and configured to receive the indication of the characteristic of the fluid and calculate a sensor-related output based on the indication of the characteristic of the fluid; anda diagnostics component configured to determine a rate of degradation of the analytic sensor based on the sensor-related output and a reference value, wherein the rate of degradation is compared to a pre-selected threshold.2. The process analytic system of claim 1 , wherein the analytic sensor is a pH sensor.3. The process analytic system of claim 2 , wherein the sensor-related output is pH slope.4. The process analytic system of claim 2 , wherein the sensor-related output is offset.5. The process analytic system of claim 2 , wherein the sensor-related output is reference impedance.6. The process analytic system of claim 2 , wherein the sensor-related output is pH glass impedance.7. The process analytic system of claim 1 , ...

METHOD FOR MONITORING THE FUNCTION OF A SENSOR

The invention relates to a method for monitoring the function of a sensor, comprising: calibrating the sensor, wherein calibration values of at least one of the calibration parameters are determined and stored; repeating the calibration until a trend of the calibration values of the at least one calibration parameter can be determined; determining a trend line from the calibration values of the at least one calibration parameter; and calibrating the sensor, wherein a calibration value estimated on the basis of the trend line is used as a theoretical calibration value of the at least one calibration parameter. 1. A method for monitoring the function of a sensor , comprising:calibrating the sensor and determining a calibration value of a calibration parameter;storing the calibration value;repeating the calibrating, the determining, and the storing until a trend of the calibration values can be determined;determining a trend line from the stored calibration values;estimating a value of the calibration parameter on the basis of the trend line; andcalibrating the sensor using as a theoretical calibration value the estimated value of the calibration parameter.2. The method according to claim 1 , wherein the calibrating occurs after a specific time interval.3. The method according to claim 1 , wherein the calibration parameter is one of: a zero point claim 1 , a steepness of the calibration function claim 1 , and an isothermal intersection of a calibration function.4. The method according to claim 1 , further comprising:adjusting the sensor based on a calibration based on the trend line of the calibration parameter.5. The method according to claim 1 , wherein the calibrating takes place several times within a specific time interval.6. A sensor claim 1 , comprising:a primary sensor embodied to detect a potentiometric measurand and configured to output a measurand-dependent primary signal; anda circuit configured to process the primary signal, the circuit including a data ...

Device and Method for Detecting Chemical and Physical Phenomena

Provided is a device adapted for detecting chemical and physical phenomena and suitable for high integration, and a method for controlling the detection device. When a plurality of pH-detecting devices are used, a variation in sensitivity occurs in each of the sensing units. The variation in sensitivity can be calibrated using a simple method. The amount of charge (output signal) delivered by each of the sensing units to a standard solution is determined, and the difference between the delivered charge amount and a standard charge amount (standard output signal) delivered by a standard sensing unit is determined. The capacity of the potential well of the sensing unit is changed, or the potential of a TG unit when a charge is delivered is changed, so as to cancel out the difference. 115-. (canceled)16. A calibrating method for calibrating an output of each of detecting devices integrated with each of reference electrodes applied with a predetermined potential in an integrated device , each of the detecting devices comprising a sensing section for changing a bottom potential of a potential well correspondingly to a chemical and physical phenomenon to be detected , an ID section for supplying a charge to the sensing section , an ICG section for adjusting a charge quantity supplied from the ID section to the sensing section , and an FD section for storing a charge of the sensing section through a TG section , comprising:a detecting step for detecting the output of each of the detecting devices correspondingly to a chemical and physical phenomenon of a standard state;a comparing step for comparing the output of each of the detecting devices with a standard output of a standard detecting device corresponding to the chemical and physical phenomenon of the standard state; anda control step for changing a capacitance of a potential well of each of the detecting devices and/or changing a potential of the TG section in transferring the charge on a basis of a compared result of ...

Systems, Buffer Solutions, and Methods for Predicting Acidic Amendment Requirements in Soils

A method and system for testing soil includes wetting a selected soil sample to obtain a soil solution and measuring an initial pH of the soil solution. A buffer solution is then applied to the soil solution to displace alkaline anions from soil colloids of the soil solution with a displacement agent and to neutralize the alkaline anions with a neutralization agent in a buffer having a buffer pH of between 4.38 and 4.42. A resultant pH of the soil solution is then measured. A target pH for the soil sample is selected, and using mathematical relationships of the disclosure, an acidic amendment recommendation is obtained as a function of the initial pH, the resultant pH, and the target pH. 1. A method of testing soil , comprising:wetting a selected soil sample with one of deionized water or distilled water to obtain a soil solution;measuring an initial pH of the soil solution;applying a buffer solution to the soil solution, the buffer solution to displace alkaline anions from soil colloids of the soil solution with a displacement agent and neutralize the alkaline anions with a neutralization agent in a buffer having a buffer pH of between 4.0 and 5.0;measuring a resultant pH of the soil solution after the applying the buffer solution;selecting a target pH for the selected soil sample; andobtaining an acidic amendment recommendation as a function of the initial pH, the resultant pH, and the target pH.2. The method of claim 1 , further comprising determining an exchangeable basicity of the selected soil sample from the initial pH and the resultant pH claim 1 , the function for the obtaining the acidic amendment recommendation further of the exchangeable basicity.3. The method of claim 1 , further comprising selecting an acidic amendment from the group consisting of elemental sulfur claim 1 , sulfuric acid claim 1 , aluminum sulfate claim 1 , ferrous sulfate claim 1 , reduced nitrogen claim 1 , sulfur containing fertilizers claim 1 , and organic material.4. The method of ...

Ph monitoring device

A pH monitoring device includes a chamber for containing a solution; and a polymer immersed in the solution. The physical state of the polymer is changeable in dependence on whether the pH of the solution exceeds a threshold value. The pH monitoring device includes further includes a detector configured to detect the change of the physical state of the polymer and thus determine the pH of the solution.

POTENTIOMETRIC MEASURING CHAIN AND METHOD FOR DETERMINING THE PH VALUE

Disclosed is a potentiometric rod-shaped measuring chain for determining the pH value, comprising a measuring half-cell with a measuring electrode () and a reference half-cell with at least one reference electrode (). In order to be able to carry out a functional check of the measuring chain during the pH measurement, provision is made for a voltammetric measuring cell with a working electrode () and a counterelectrode () to be additionally provided for the purpose of checking the potential measurement of the measuring chain, wherein the voltammettic measuring cell is connected to a voltammetric evaluation unit. 115-. (canceled)1611. A potentiometric rod-shaped measuring chain for determiningp- value comprising:a measuring half-cell with a measuring electrode; anda reference half-cell with at least one reference electrode;wherein a voltammetric measuring cell having a working electrode and a counterelectrode is provided for checking a potential measurement of the measuring chain, wherein the voltammetric measuring cell is connected in use to a voltammetric evaluation uni t,17. The measuring chain of claim 16 , wherein an additional reference electrode is provided for the voltammetric measuring cell.18. The measuring chain of claim 17 , wherein the additional reference electrode for the voltammetric measuring cell is arranged in the reference half-cell.19. The measuring chain of claim 16 , wherein the voltammetric measuring cell is connected to the reference electrode of the reference half-cell such that the potential of the voltammetric measuring cell can be measured against the reference electrode of the reference half-cell.20. The measuring chain of claim 16 , wherein the voltammetric measuring cell is connected to the measuring electrode of the measuring half-cell such that the potential of the voltammetric measuring cell can be measured against the measuring electrode of the measuring half-cell.21. The measuring chain of claim 16 , wherein the voltammetric ...

SMART SENSOR SYSTEM

A smart sensor system is provided which uses a monitoring electrode to produce a calibration output that can be used in-situ and in real-time to monitor and address reference electrode drift and to provide information regarding sensor operation. The monitoring electrode uses a redox chemistry that is either a non-active redox species that is not sensitive to changes in a solution being tested/monitored or a redox active species that sets a pH of the local environment proximal to the electrode when the electrode is contacted with a test and/or reference solution. The smart sensor system includes at least one of a solid-state electrochemical sensor; a glass electrode, a reduction oxidation sensor; and/or a glucose sensor and/or a sensor to monitor constituent parts of the solution composition. 1. A smart sensor system for sensing at least one property of a test solution , comprising:a monitoring electrode comprising a redox species and configured to produce a stable redox potential to an applied voltammetric signal when contacted with the test solution;a test sensor for measuring a property of the test solution; andprocessing circuitry in communication with the monitoring electrode and the test sensor and configured to use the stable redox potential to calibrate the test electrode.2. The smart sensor system of claim 1 , wherein the stable redox potential is used to calibrate the reference electrode by monitoring a potential difference between the stable redox potential of the monitoring electrode and a reference voltage of the reference electrode.3. The smart sensor system of claim 1 , wherein the monitoring electrode is held within a reference solution held in a smart reference electrode claim 1 , and the entire smart reference electrode is placed in the test solution.4. The smart sensor system of claim 3 , wherein the stable redox potential is used to calibrate the reference electrode by monitoring a potential difference between the stable redox potential of the ...

PH INDICATOR DEVICE AND FORMULATION

Disclosed herein are devices and methods for determining the pH of fluid. Example devices include a device comprising a surface configured to contact the fluid and a pH indicator covalently bound thereto, wherein the pH indicator has a first colour prior to contact with the fluid and changes colour as a function of the pH of the fluid. 1. (canceled)2. The article according to claim 32 , wherein the colour change in the pH indicator is detectable at a 0.1 unit interval change in pH.3. The article according to claim 2 , wherein the colour change in the pH indicator is detectable between about pH 5 and about pH 10.4. The article according to claim 3 , wherein the colour change in the pH indicator is detectable between about pH 5.5 and about pH 9.5.5. The article according to claim 3 , wherein the colour change in the pH indicator is detectable between about pH 6.5 and 9.5.6. (canceled)7. (canceled)8. (canceled)9. The article according to claim 32 , wherein the article comprises a cellulosic material.10. (canceled)11. (canceled)12. The article according to claim 32 , wherein the article comprises a peripheral edge claim 32 , the pH indicator positioned on the peripheral edge.13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. (canceled)23. (canceled)24. (canceled)25. (canceled)26. (canceled)27. (canceled)28. (canceled)29. (canceled)30. (canceled)31. (canceled)32. An article of manufacture claim 32 , comprising:a fluid-contacting surface, wherein the article of manufacture further comprises a gel configured to contact the fluid, the gel comprising a pH indicator comprising 2-[(4-(2-hydroxyethylsulfonyl)-phenyl)diazenyl]-4-methylphenol and 4-[4-(2-hydroxyethylsulphonyl)-phenylazo]-2,6-dimethoxy phenol in about a 2:1 ratio33. The article of claim 32 , wherein the gel is an adhesive.34. The article of claim 32 , further comprising a conduit configured to direct fluid to the pH indicator.35. The ...

USE OF A REFERENCE SYSTEM FOR ELECTROCHEMICAL ANALYSIS AND DEPOSITION METHODS

Use of a reference system for electrochemical analysis and deposition methods, in which analysis or deposition methods at least one operating electrode (), a mating electrode () and a reference electrode () are used, wherein the reference electrode () is a pH electrode () that has an impermeable membrane (), and an input amplifier V () for the pH electrode () having a high input impedance is provided, and supplies the signal from the pH electrode () to the input amplifier V () via a cable, and a further amplifier V () is provided, which is used to compensate for the disadvantageous effects of the screening and of the cable and of the test setup, or the amplifier V () is integrated in the pH electrode () as an impedance converter, or the amplifier V () is integrated in the connector of the pH electrode as an impedance converter. 1. A method for electrochemical analysis and deposition , the method comprising the steps of:(a) providing a reference system, the reference system including at least one working electrode, one mating electrode and one reference electrode, wherein the reference electrode is a pH electrode which comprises an impermeable membrane, the reference system further including an input amplifier VI for the pH electrode having a high input impedance; [{'b': 1', '2, 'i) delivering the signal of the pH electrode to the input amplifier V via a cable and providing a further amplifier V, which is used to compensate for the detrimental effects of the guarding and of the cable and of the measurement layout, or'}, {'b': 1', '2, 'ii) integrating the amplifier V as an impedance converter into the pH electrode and providing a further amplifier V which is used to compensate for the detrimental effects of the guarding of the pH electrode, into which the pH electrode is integrated, or'}, {'b': 1', '2, 'iii) integrating the amplifier V as an impedance converter into the jack of the pH electrode and providing a further amplifier V, which is used to compensate for the ...

MITIGATING IMPACT OF ION BUILDUP ON PH SENSOR PERFORMANCE

A self-vibrating pH probe comprise a housing containing an electronic assembly to which is coupled a vibration source element so that at least a portion of vibrations caused by the vibration source element propagate to the electronic assembly, the vibration source element being controllable for at least on/off operation. The self-vibrating pH probe further comprising a pH probe member having a probe tip at a first end, the probe member extending from the housing and mechanically and electrically coupled by a second end to the electronic assembly so that at least a portion of vibrations propagating to the electronic assembly further propagate to the probe tip; and further including a processor coupled to the electronic assembly for coordinating operation of the vibration source element and operation of the pH probe member. 1. A self-vibrating pH probe comprising:a housing containing an electronic assembly adapted to support detecting pH of an environment;a vibration source disposed so that at least a portion of vibrations caused by the vibration source propagate to the electronic assembly, the vibration source being controllable for at least on/off operation;a pH probe member having a probe tip at a first end, the probe member extending from the housing and mechanically and electrically coupled by a second end to the electronic assembly so that at least a portion of vibrations propagating to the electronic assembly further propagate to the probe tip;a processor coupled to the electronic assembly and adapted to coordinate operation of the vibration source and operation of the pH probe member.2. The probe of claim 1 , wherein coordinating operation of the vibration source comprises controlling a vibration amplitude.3. The probe of claim 1 , wherein coordinating operation of the vibration source comprises controlling a vibration profile.4. The probe of claim 1 , wherein coordinating operation of the vibration source and operation of the pH probe member comprises ...

Identification of calibration deviations of pH-measuring devices

The invention relates to a comparison unit () configured for determining if a first pH measuring device of a first tank () is affected by a pH-measuring problem, the comparison unit being configured for: —receiving a first CO2 concentration and a first pH value, the first CO2 concentration being a CO2 concentration of a first gas volume above a medium in a first tank, the first CO2 concentration and the first pH value being measured at a first time when the medium in the first tank is in pH-CO2 equilibrium state with the first gas volume and before said equilibrium state is modified by the metabolism of a cell culture in the first tank, the first pH value being a measured value provided by a first pH measuring device operatively coupled to the first tank (); —receiving a second CO2 concentration and a second pH value, the second CO2 concentration being a CO2 concentration of a second gas volume above a medium in a second tank, the second CO2 concentration and the second pH value being measured at a second time when the medium in the second tank is in pH-CO2 equilibrium state with the second gas volume and before said equilibrium state is modified by the metabolism of a cell culture, the second pH value being a measured value provided by a second pH measuring device; —comparing the first and second pH values and CO2 concentrations for determining if comparing (), by the comparison unit, the first and second pH values and comparing the first and second CO2 concentrations for determining if the first pH measuring device is affected by the pH-measuring problem. 1. A method for determining if a first pH measuring device operatively coupled to a first tank is affected by a pH-measuring problem , the problem being that the first pH measuring device is calibrated differently than a second pH measuring device operatively coupled to a second tank , the method comprising:receiving, by a comparison unit, a first CO2 concentration and a first pH value, the first CO2 ...

SENSING ELEMENT FOR USE WITH MEDIA-PRESERVING STORAGE AND CALIBRATION CHAMBER

A sensor may include a sensing element retained within a storage compartment filled with a storage medium, which may also be used as a calibration medium. The sensing element can include a sensing surface located away from the distal end of the sensing element, such that an inactive section of the sensing element can cooperate with a sealing member such as an O-ring to form part of the seal retaining the storage/calibration medium. The sensing element can be extended and retracted from the storage compartment to expose the sensing surface to a process medium, while preserving the storage medium within the storage compartment for post-measurement validation. 1. A sensor structure , comprising:a storage compartment configured to retain a storage medium therein;a sensing element extending through an aperture in the compartment and comprising a sensing structure, a distal end of the sensing structure located proximal a distal end of the sensing element, the sensing element movable between a first position in which the sensing structure is in fluid communication within the storage compartment and a second position in which the sensing structure is not in fluid communication with the storage compartment; anda sealing element disposed at least partially within the aperture and configured to engage a surface of the sensing element to provide a seal inhibiting fluid flow in or out of storage compartment through the aperture.2. The sensor structure of claim 1 , wherein the sensing surface is substantially flush with the adjacent surfaces of the sensing element.3. The sensor structure of claim 1 , wherein the sensing element comprises a section of substantially constant cross-sectional shape extending between a point distal the proximal end of the sensing surface and a point proximal the distal end of the sensing surface.4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. The sensor structure of claim 1 , wherein the sensing element comprises a pH sensor.10. ( ...

METHODS AND APPARATUS FOR MEASURING ANALYTES

A method, computer program product, and system are provided to calibrate a sensor array with a plurality of sensors. The method can include sweeping a voltage of a reference electrode from a first voltage to a second voltage, where the reference electrode is in fluid communication with the sensor array. The output voltage of each of the plurality of sensors can be monitored at one or more voltages within the first and second voltages. An overall average gain of the plurality of sensors can be calculated at each of the one or more voltages. Further, an acquisition window for the sensor may can be determined. The acquisition window can include a maximum distribution of sensors that provides a maximal overall average gain at a particular reference electrode voltage. 1. A method for calibrating a sensor array with a plurality of sensors , the method comprising:sweeping a voltage of a reference electrode from a first voltage to a second voltage, wherein the reference electrode is in fluid communication with the sensor array;monitoring an output voltage of each of the plurality of sensors at one or more voltages within the first and second voltages;calculating an overall average gain of the plurality of sensors at each of the one or more voltages; anddetermining an acquisition window for the sensor array, wherein the acquisition window comprises a maximum distribution of sensors that provide a maximal overall average gain at a particular reference electrode voltage.220-. (canceled) This application is a continuation-in-part of U.S. patent application Ser. No. 12/475,311 filed May 29, 2009, titled “Methods and Apparatus for Measuring Analytes” (LTC Docket No. LT00326.1). This application also claims priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 61/428,733, filed Dec. 30, 2010, titled “Apparatus, Methods, and Software for Performing Electrochemical Reactions” (LTC Docket No. LT00415 PRO). The contents of the foregoing applications are incorporated ...

Portable sensor validation system

A food wash reference fluid delivery apparatus includes a portable reference fluid reservoir comprising an inlet and an outlet and configured to store a reference fluid that includes a predetermined concentration of an analyte, a pump fluidly coupled to the outlet of the portable reference fluid reservoir and configured to pump the reference fluid from the outlet of the portable reference fluid reservoir, a sensor connector configured to fluidly couple with a sensor positioned along a fluid flow path of the food wash system, a sensor fluid line configured to provide the reference fluid from the pump to the sensor connector, an inlet fluid line configured to provide the reference fluid from the pump to the inlet of the portable reference fluid reservoir, and a valve configured to adjustably control a fluid flow rate of the reference fluid through the sensor fluid line and the inlet fluid line.

CHARACTERIZATION AND FAILURE ANALYSIS OF A SENSOR USING IMPEDANCE FREQUENCY RESPONSE SPECTRA

According to at least one aspect of the present disclosure, a method includes applying an alternating current having a frequency at a selected voltage to a sensor, wherein the voltage is applied between a reference electrode and a working electrode of the sensor, varying the frequency of the alternating current between a lower frequency and an upper frequency, measuring an impedance of the sensor between the reference electrode and the working electrode as a function of the frequency of the alternating current, analyzing the measured impedance to determine a total impedance of the sensor and the real and imaginary components of the total impedance at each applied frequency of the alternating current, and characterizing the sensor based on the total impedance at the low frequency end of the sensor and on the real and imaginary components of the total impedances. 1. A method of characterization and failure analysis of a measuring sensor , the method comprising:applying a test signal to a sensor, the test signal comprising an alternating current having at least two frequencies, each at a selected voltage, wherein the voltage is applied between a reference electrode and a working electrode of the sensor, and wherein the test signal comprises the at least two frequencies in parallel;measuring an impedance of the sensor between the reference electrode and the working electrode over the at least two frequencies of the alternating current;analyzing the measured impedances to determine one or more total impedance of the sensor and/or the real and/or imaginary components of the one or more total impedance at the at least two frequencies of the alternating current; andcharacterizing the sensor based on the one or more total impedance and/or on the real and/or imaginary components of the one or more total impedance.2. The method of claim 1 , wherein the measuring of an impedance includes:detecting a resulting signal at the working electrode relative to a reference;processing ...

ISFET MEASURING PROBE, MEASUREMENT CIRCUIT FOR THE ISFET MEASURING PROBE, AND METHOD

ISFET measuring probe with a housing in which an ISFET and a reference electrode are arranged in such a way that the gate electrode of the ISFET, which is coated with an ion-sensitive layer, and the reference electrode reach into a measurement space into which a measurement medium can be introduced, with the distinguishing feature that an auxiliary electrode is arranged additionally inside the housing and is held inside the measurement space. 1. A measurement circuit , for use in a measurement probe that is measuring an ion concentration of a measurement medium and for diagnosing the operation of the measuring probe , which comprises a reference electrode , an auxiliary electrode and an ion-sensitive field effect transistor (ISFET) having a gate electrode that is coated with an ion-sensitive layer , such that the respective electrodes are immersible in the measurement medium , the measurement circuit comprising:a first voltage source, providing a constant voltage, with a first potential thereof that is connected to a drain terminal of the ISFET;a measurement resistor, with a first terminal thereof connected to a source terminal of the ISFET and a second terminal thereof connected to a second potential of the first voltage source;an operational amplifier, such that a non-inverting input thereof is connected to a settable controlling voltage, an inverting input thereof is connected to the first terminal of the measurement resistor, and an output thereof is connected to the reference electrode, andat least one controllable switch that can be switched between a measurement position, in which the measurement of the measurement medium takes place, and at least one diagnostic position, in which the diagnosis of the measuring probe takes place.2. The measurement circuit of claim 1 , wherein:in the diagnostic position, the auxiliary electrode is connected by way of a load resistor and the controllable switch to a constant test voltage, andin the measurement position, the ...

SENSOR CALIBRATION DEVICE AND SENSOR CALIBRATION METHOD

A sensor calibration device for calibrating a sensor device, includes a sensor reader configured to read, from a reference sensor, a physical quantity which is a reference of a calibration and detected by the reference sensor, and a sensor manager configured to convert the physical quantity read by the sensor reader into a reference measurement value, the sensor manager being configured to obtain a calibration target measurement value obtained by the sensor device measuring the physical quantity, and the sensor manager being configured to output, to the sensor device, a calibration instruction based on the reference measurement value and the calibration target measurement value. 1. A sensor calibration device for calibrating a sensor device , comprising:a sensor reader configured to read, from a reference sensor, a physical quantity which is a reference of a calibration and detected by the reference sensor; anda sensor manager configured to convert the physical quantity read by the sensor reader into a reference measurement value, the sensor manager being configured to obtain a calibration target measurement value obtained by the sensor device measuring the physical quantity, and the sensor manager being configured to output, to the sensor device, a calibration instruction based on the reference measurement value and the calibration target measurement value.2. The sensor calibration device according to claim 1 , further comprising:an interface configured to show information on the reference measurement value and information on the calibration target measurement value, and the interface being configured to receive an input of a calibration execution instruction for instructing to execute the calibration of the sensor device,wherein the sensor manager is configured to output, to the sensor device, the calibration instruction in response to the calibration execution instruction input to the interface.3. The sensor calibration device according to claim 1 ,wherein the ...

Magnetic stimulus of isfet-based sensor to enable trimming and self-compensation of sensor measurement errors

An ion sensor apparatus comprises at least one ion sensitive field effect transistor (ISFET) device configured to be exposed to a liquid, a reference electrode configured to contact the liquid to which the ISFET device is exposed, and at least one magnet configured to intermittently expose the ISFET device to a magnetic field. A processor is operatively connected to the ISFET device and the reference electrode. The processor modulates the magnetic field to produce a corresponding modulated output in resistance of the ISFET device, and modulation of a reported output value of the ion sensor apparatus.

DEVICE, SENSOR UNIT AND TRANSMITTER FOR DETERMINING A MEASURED VARIABLE

A device () for determining a measured variable, that allows an as simple as possible adaptation to the measurement conditions, is achieved in that the device () has a sensor unit () and a transmitter (). The sensor unit () generates an electric primary signal in dependence on the measured variable, and communicates the primary signal via an analog output interface () to the transmitter () which processes the primary signal. Furthermore, the sensor unit () and transmitter () are advantageous by themselves, and the sensor unit () preferably allows for offline calibration under constant surrounding conditions.

ONLINE REFERENCE CALIBRATION

An online calibration system for an electrochemical sensor. The calibration system comprises a calibration electrode coupled with a redox species, where the redox species is configured to control a pH of a reference solution local to the calibration electrode, such that when a voltammetric signal is applied to the calibration electrode the output generated from the calibration system is determined by the local environment pH. The output signal from the calibration system is used to calibrate a reference potential generated by a reference system of the electrochemical sensor to correct for drift in the reference potential when the electrochemical sensor is being used. The calibration electrode may be disposed in a reference cell of the electrochemical sensor. 1. An online calibration system for an electrochemical sensor , comprising: a calibration electrode in a reference solution , the calibration electrode comprising: 'the redox species is configured to set a pH of the reference solution in a local environment proximal to the calibration electrode;', 'a redox species, whereinthe redox species is configured to undergo oxidation and/or reduction when an electrochemical signal is applied to the calibration electrode; andthe redox species is sensitive to pH and generates a response to the applied electrochemical signal that is dependent on the pH of the local environment proximal to the calibration electrode, anda polymeric layer positioned between the redox species and the reference solution.2. The online calibration system according to claim I , wherein the polymeric layer slows a diffusion rate of protons from the reference solution to the redox species , after the redox species has set a pH of the reference solution in the local environment proximal to the calibration electrode.3. The online calibration system according to claim 1 , wherein the polymeric layer is anionically charged.4. The online calibration system according to claim 1 , wherein the polymeric layer ...

Failure analysis of a measuring sensor with an integrated temperature sensor

According to at least one aspect of the present disclosure, a method includes applying an alternating current at a selected voltage to a sensor, wherein the voltage is applied between a working electrode and/or reference electrode of the sensor and a temperature sensor integrated into the sensor, varying the frequency of the alternating current between a lower frequency and an upper frequency, measuring an impedance of the sensor between the working electrode and/or reference electrode and the temperature sensor as a function of the frequency of the alternating current, and determining whether, based on the total impedance at the low frequency end of the sensor and on the real and imaginary components of the impedance, the insulations between working electrode and/or reference electrode and temperature sensor have a defect.

Method and apparatus for determining a state of a measuring transducer integrated in a process container

A method for determining a state of a measuring transducer integrated in a process container, wherein in the process container one or more processes are being performed, and the measuring transducer registers at least one physical or chemical process parameter within the process container, includes steps as follows: identifying a process currently being performed in the process container; and ascertaining a deviation value as measure of a deviation of a measured value progression registered by the measuring transducer during the process currently being performed in the process container from a measured value progression expected for the identified process, wherein the state of the measuring transducer and/or of the process is determined utilizing the ascertained deviation value.

METHOD OF MEASURING pH OF ANALYTE SOLUTION, AND pH MEASURING DEVICE

A simplified, rigorous and accurate method of measuring pH of an analyte solution with extreme precision, which does not cause errors against actual pH through compensating a pH variation by a liquid temperature or a concentration of potassium chloride of an internal liquid in a glass electrode or a reference electrode when pH is measured with respect to various analyte solutions such as a sample solution having a high concentration of salts, a sample solution contaminated with salts and a sample solution having a low concentration of salts.

Methods and apparatus for measuring analytes

A method, computer program product, and system are provided to calibrate a sensor array with a plurality of sensors. The method can include sweeping a voltage of a reference electrode from a first voltage to a second voltage, where the reference electrode is in fluid communication with the sensor array. The output voltage of each of the plurality of sensors can be monitored at one or more voltages within the first and second voltages. An overall average gain of the plurality of sensors can be calculated at each of the one or more voltages. Further, an acquisition window for the sensor array can be determined. The acquisition window can include a maximum distribution of sensors that provides a maximal overall average gain at a particular reference electrode voltage.

ALKALINITY MEASUREMENT OF AN AQUEOUS SAMPLE

An embodiment provides a method for compensating for inteferants in measurement of alkalinity in a reagent-less system, including: introducing an aqueous sample into a measurement device comprising one or more series of electrodes; applying an electrical signal to the aqueous sample using the one or more series of electrodes, wherein the electrical signal is selected from the group consisting of: current and voltage; identifying, during application of the electrical signal, that the electrical signal reaches an oxidation threshold and measuring, prior to reaching the oxidation threshold, a first electrical response to the electrical signal, the first electrical response attributable to interferants in the aqueous sample; identifying, during application of the electrical signal, that the electrical signal reaches an endpoint and measuring, from the oxidation threshold to the endpoint, a second electrical response to the electrical signal; and measuring an alkalinity of the aqueous sample based upon a difference between the first electrical response and the second electrical response. Other aspects are described and claimed. 1. A method for compensating for interferants in measurement of alkalinity in a reagent-less system , comprising:introducing an aqueous sample into a measurement device comprising one or more series of electrodes;applying an electrical signal to the aqueous sample using the one or more series of electrodes, wherein the electrical signal is selected from the group consisting of: current and voltage;identifying, during application of the electrical signal, that the electrical signal reaches an oxidation threshold and measuring, prior to reaching the oxidation threshold, a first electrical response to the electrical signal, the first electrical response attributable to interferants in the aqueous sample;identifying, during application of the electrical signal, that the electrical signal reaches an endpoint and measuring, from the oxidation threshold ...

DEVICE AND METHOD FOR VERIFICATION, CALIBRATION AND/OR ADJUSTMENT OF AN INLINE MEASURING DEVICE

The present disclosure relates to an apparatus the for verification, calibration, and/or adjustment of a measuring instrument. The apparatus includes the measuring instrument, a reference measuring instrument, and a smart device. The apparatus performs a measuring operation in which the measuring instrument determines a value of a variable of the medium and the reference instrument determines a reference value of the variable from a sample of the medium. The measuring instrument communicates wirelessly and performs the verification, calibration, and/or adjustment on the basis of the measured value and the associated reference value. The reference measuring instrument is portable and communicates wirelessly with the smart device and the measuring instrument. An application executed on the smart device controls a data transfer between the measuring instrument, the reference measuring device, and/or the device that is required for executing the verification, calibration, and/or adjustment. 1. An apparatus for the verification , calibration and/or adjustment of an in-line measuring instrument for measuring a measurement variable of a medium present at a measuring point at a location of use , comprising:the measuring instrument installed at the measuring point; anda reference measuring instrument for measuring the measurement variable of a sample of the medium taken at the measuring point,wherein the apparatus is configured to perform a measuring operation in which the measuring instrument determines a measured value of the measurement variable and the reference measuring instrument determines a reference value of the measurement variable of the sample,wherein the measuring instrument is designed to communicate wirelessly and is configured to perform a verification, calibration and/or adjustment of the measuring instrument on the basis of the measured value and the reference value both obtained in the measuring operation, andwherein the reference measuring instrument is ...

MAGNETIC STIMULUS OF ISFET-BASED SENSOR TO ENABLE TRIMMING AND SELF-COMPENSATION OF SENSOR MEASUREMENT ERRORS

An ion sensor apparatus comprises at least one ion sensitive field effect transistor (ISFET) device configured to be exposed to a liquid, a reference electrode configured to contact the liquid to which the ISFET device is exposed, and at least one magnet configured to intermittently expose the ISFET device to a magnetic field. A processor is operatively connected to the ISFET device and the reference electrode. The processor modulates the magnetic field to produce a corresponding modulated output in resistance of the ISFET device, and modulation of a reported output value of the ion sensor apparatus. 1. An ion sensor apparatus , comprisingat least one ion sensitive field effect transistor (ISFET) device configured to be exposed to a liquid;a reference electrode configured to contact the liquid to which the ISFET device is exposed;at least one magnet configured to intermittently expose the ISFET device to a magnetic field; anda processor operatively connected to the ISFET device and the reference electrode;wherein the processor modulates the magnetic field to produce a corresponding modulated output in resistance of the ISFET device, and modulation of a reported output value of the ion sensor apparatus.2. The sensor apparatus of claim 1 , wherein the at least one magnet comprises an electromagnet.3. The sensor apparatus of claim 2 , wherein the electromagnet is selectively activated by the processor to intermittently expose the ISFET device to the magnetic field produced by the electromagnet.4. The sensor apparatus of claim 1 , wherein the at least one magnet comprises a permanent magnet.5. The sensor apparatus of claim 4 , further comprising a magnetic shield that is configured to intermittently expose the ISFET device to the magnetic field produced by the permanent magnet.6. The sensor apparatus of claim 1 , further comprising a magnetic field sensor adjacent to the magnet and configured to measure the magnitude or state of the magnetic field.7. The sensor ...

Method for Identifying pH, Device for Same, and Method for Identifying Ion Concentration

The purpose of the present invention is to measure pH of a sample with high accuracy in a pH sensor array, without the use of a glass reference electrode. Each time that a sample is measured, the potential Vrm of the sample is identified, and the identified potential Vrm is used to calculate the pH. The outputs Voi and Voi of a first element and a second element located near one another in a sensor array are represented as follows. Voi=Si×pHi+Gi×Vrm+Ci, Voi=Si×pHi+Gi×Vrm+Ci. Voi is the output of the element, Si and Gi are sensitivity coefficients, and Ci is a constant, these values having been derived in advance. Here, where the potential Vrm is constant, and the elements located near one another are presumed to be at equal pH (pHi=pHi), the potential Vrm is identified by solving a linear equation with two unknowns. 1. A method for determining pH of a sample in contact with an element i constituting a pH sensor array by referring to output Voi of the element i defined as follows:{'br': None, 'i': Voi=Si', 'i+Gi×Vrm+Ci, '×pH\u2003\u2003Equation (1)'}wherein pHi is pH of the sample in contact with the element i, Vrm is potential of the sample, Si and Gi are sensitivity coefficients, and Ci is a constant,comprising:a calibrating step of contacting the sensor array with a standard solution and calibrating the sensitivity coefficients Si and Gi and the constant Ci specific to the element i by referring to the output Voi of the element i;{'b': 1', '2', '1', '1', '2', '2, 'a first measuring step of selecting a first element i and a second element i located near each other in the sensor array, contacting the sensor array with the sample, and measuring output Voi of the first element i and output Voi of the second element i;'}{'b': 1', '2', '1', '2', '1', '1', '2', '2', '1', '2', '1', '2', '1', '2', '1', '2, 'a potential determining step of determining potential Vrm of the sample, on the presumption that pHi and pHi of the sample contacted with the first element i and the ...

PH VALUE MEASURING DEVICE COMPRISING IN SITU CALIBRATION MEANS

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. 115-. (canceled)16. Device for measuring the pH of an effluent , said device comprising means for measuring a piece of information representing the pH of said effluent that are to be put into contact with said effluent , and means for modifying the value of the pH of said effluent in proximity to said means for measuring ,characterized in that it comprises means for calibrating said device for measuring, said means for calibrating being configured to calibrate the device for measuring after modification of said pH of said effluent in proximity to said means for measuring by said means for modifying.18. Device according to claim 17 , characterized in that said means for calibrating are configured to implement steps of calibration during which:{'sub': '1', 'they act on said means for modifying the value of the pH to take it momentarily to a first known value pH, then'}{'sub': GS', 'GS1', '1, 'they act on said means for measuring a control voltage V, to measure the value Vcorresponding to the first value pH;'}{'sub': '2', 'they act on said means for modifying the value of the pH to take it momentarily to a second known value pH; then'}{'sub': GS', 'GS2', '2, 'they act on said means for measuring a control voltage V, to measure the value Vcorresponding to the second value pH;'}{'sup': '0', 'sub': 2', '1', '2', 'GS1', 'GS2, 'they compute the value of said constants E, Caccording to the known values of pH, pH, Vand V.'}19. Device according to claim 16 , characterized in that said means for modifying the value of the pH comprise an anode and a cathode to be put into contact with said effluent claim 16 , and first means for generating electric current between said anode and said cathode.20. Device according to claim 19 , characterized in that ...

APPARATUS, SYSTEMS AND METHODS FOR IN SITU MEASUREMENT OF AN OXIDATION / REDUCTION POTENTIAL AND PH OF A SOLUTION

Methods for in situ measurement of an oxidation reduction potential (ORP) and pH of a solution comprising iron are provided. The methods comprise measuring a kinetic parameter at an electrode surface of an electrode system comprising a working electrode, a counter electrode and a pseudo-reference electrode, wherein the kinetic parameter is associated with ferric reduction or both ferric reduction and ferrous oxidation and comparing the kinetic parameter to calibration data for the electrode system to determine the ORP and pH of the solution. Also provided are apparatus and systems for in situ measurement of an ORP and pH of a solution comprising iron. The apparatus and systems comprise an electrode system comprising a working electrode, a counter electrode and a pseudo-reference electrode and a detector for measuring a kinetic parameter at an electrode surface of the electrode system. 1. A method for in situ measurement of an oxidation/reduction potential (ORP) or pH of a solution comprising iron , the method comprising:measuring a kinetic parameter at an electrode surface of an electrode system comprising a working electrode, a counter electrode and a pseudo-reference electrode, wherein the kinetic parameter is associated with ferric reduction or both ferric reduction and ferrous oxidation; andcomparing the kinetic parameter to ORP calibration data for the electrode system to determine the ORP of the solution or to pH calibration data for the electrode system to determine the pH of the solution.2. The method of claim 1 , wherein the kinetic parameter is current.3. The method of claim 2 , wherein measuring the current comprises imposing a constant cathodic overpotential on the working electrode.4. The method of claim 2 , wherein measuring the current comprises: (a) imposing an anodic overpotential followed by a cathodic overpotential on the working electrode and measuring a ratio of an anodic current to a cathodic current; or (b) imposing a cathodic overpotential ...

ONLINE REFERENCE CALIBRATION

An online calibration system for an electrochemical sensor. The calibration system comprises a calibration electrode coupled with a redox species, where the redox species is configured to control a pH of a reference solution local to the calibration electrode, such that when a voltammetric signal is applied to the calibration electrode the output generated from the calibration system is determined by the local environment pH. The output signal from the calibration system is used to calibrate a reference potential generated by a reference system of the electrochemical sensor to correct for drift in the reference potential when the electrochemical sensor is being used. The calibration electrode may be disposed in a reference cell of the electrochemical sensor. 1. An online calibration system for an electrochemical sensor , comprising:a calibration electrode comprising a redox species and configured to contact a reference solution of the electrochemical sensor, wherein:the redox species is configured to set a pH of the reference solution in a local environment of the reference solution proximal to the calibration electrode;the redox species is configured to undergo oxidation and/or reduction when an electrochemical signal is applied to the calibration electrode; andthe redox species is sensitive to pH and generates a response to the applied electrochemical signal that is dependent on the pH of the local environment of the reference solution proximal to the calibration electrode.2. The online calibration system according to claim 1 , wherein the redox species comprises at least one of: an acid claim 1 , a base claim 1 , acidic moieties claim 1 , and base moieties.3. The online calibration system according to claim 1 , wherein the redox species is configured to consume or donate protons when the electrochemical signal is applied to the calibration electrode.4. The online calibration system according to claim 1 , wherein the electrochemical signal comprises a potential ...

ALKALINITY MEASUREMENT OF AN AQUEOUS SAMPLE

An embodiment provides a method for compensating for inteferants in measurement of alkalinity in a reagent-less system, including: introducing an aqueous sample into a measurement device comprising one or more series of electrodes; applying an electrical signal to the aqueous sample using the one or more series of electrodes, wherein the electrical signal is selected from the group consisting of: current and voltage; identifying, during application of the electrical signal, that the electrical signal reaches an oxidation threshold and measuring, prior to reaching the oxidation threshold, a first electrical response to the electrical signal, the first electrical response attributable to interferants in the aqueous sample; identifying, during application of the electrical signal, that the electrical signal reaches an endpoint and measuring, from the oxidation threshold to the endpoint, a second electrical response to the electrical signal; and measuring an alkalinity of the aqueous sample based upon a difference between the first electrical response and the second electrical response. Other aspects are described and claimed. 1. A measurement device for compensating for interferants in measurement of alkalinity in a reagent-less system , comprising:at least one chamber;one or more series of electrodes at least partially disposed within one of the at least one chamber;a processor; anda memory device that stores instructions executable by the processor to:introduce an aqueous sample into a measurement device comprising one or more series of electrodes, wherein the one or more series of electrodes comprises a working electrode;apply an electrical signal to the aqueous sample using the one or more series of electrodes, wherein the electrical signal is selected from the group consisting of: current and voltage;identify, during application of the electrical signal via the working electrode, that the electrical signal reaches an oxidation threshold of water and measuring, ...

Method and apparatus for calibrating a pH/ISE meter

Apparatus for calibrating a pH/ISE meter includes a solution chamber for receiving a standard pH/ISE electrode adjustably suspended in the chamber. Inlets are provided into the chamber so that a wash solution and buffers may be introduced into the chamber by gravity, the introduction of these liquids being controlled by valves controlled by a controller. The chamber also has a drain outlet which is opened and closed by a similar valve under the control of the controller. The controller controls the valves in a pre-determined sequence to flush and fill the chamber first with a wash solution, and then with buffers so that the electrode is immersed in each buffer long enough to enable an associated pH/ISE meter to obtain a stable reading of the pH/ISE value of the buffer. After the final buffer has been emptied from the chamber, the controller controls the valves to flush and fill the chamber with a solution. The controller may also include provisions for introducing into the chamber a specimen solution whose pH/ISE value is to be determined and measuring the value of that solution. Alternatively, the electrode in the chamber may be removed and placed in a separate sample chamber to be read by the calibrated pH/ISE meter. A calibration method is also disclosed.

Method and apparatus for calibrating a pH meter

Apparatus for calibrating a pH meter includes a solution chamber for receiving a pH electrode so that a seal is established between the electrode and the wall of the chamber near the top of the chamber. A plurality of inlets are provided into the chamber so that air, a washing solution and a plurality of buffer solutions may be introduced into the chamber below the sealing means, the introduction of these fluids being controlled by valves. The chamber also has a fluid outlet at the bottom of the chamber controlled by a valve. All of the valves are actuated by a programmable controller which also receives a signal from a sensor which senses when the chamber is full of liquid. The controller controls the valves in a pre-determined sequence to pre-clean and fill the chamber with a washing solution, soak the electrode in the chamber for a pre-determined time and then drain the chamber of washing solution. Then, the controller controls the valves to pre-clean and fill the chamber with a buffer solution and soak the electrode in that solution for a sufficient time to enable an associated pH meter to obtain a stable reading of the pH is value of the buffer solution. After a stable reading is obtained, the controller may control the valves to empty the chamber and may refill the chamber with at least one additional buffer solution so that an additional measurement may be taken by the meter for that solution. After the final buffer solution has been emptied from the chamber, the controller may control the valves to introduce into the chamber a specimen solution whose pH value is to be determined.

Standardisation of electrometric pH meter - via electronic circuit which includes microprocessor and memory store contg. data obtd. from standard solns.

The pH of at least two standard solns. with known pH are measured as voltages (U1,U2) and are automatically stored and compared with the known pH values to obtain a straight line graph indicating the relationship between the actual voltages obtd. by the measuring electrode and the correct pH value. The measurement of the voltages obtd. from the standard solns. is pref. repeated automatically after prescribed time intervals. The pref. electronic appts. includes an analogue digital converter, a memory store, and a microprocessor. The zero point and steepness of the graph correlating voltage and pH can be checked at desired intervals.

Disposable measurement arrangement and method of testing and/or calibrating said arrangement

A measurement arrangement comprising a flexible disposable container (101) and a disposable measurement probe (103) for measuring an analytical property of a medium, which is mounted on an inside wall of said disposable container (101) and comprises a sensing element (107) extending into the container (101), is described, which is ready to use and which produces reliable measurement results, said disposable measurement arrangement comprising: a closed capsule (109) containing a buffer solution and a tether (111) connecting said capsule (109) to said probe (103). The container (101), the measurement probe (103), the capsule (109) and the buffer solution are sterilized. The sensing element (109) is inserted in said buffer solution during storage and the capsule (109) is removed from the sensing element (109) during measurement operation.

System for determining concentration of an electrolyte

A system and method for checking the concentration of an electrolyte in a solution utilizing ion-selective electrodes for sequentially measuring potential levels of a sample solution and a correction solution at selected time intervals. The potential levels of the positive and negative ions in the sample and corrective solutions are then compared with a standard potential level for the correction solution. A procedure determines if an abnormal deviation in the sample solution exists and if this abnormal deviation is caused by the actual concentration of electrolytes in the sample solution or if the abnmormality is caused by an error in measurement. An alarm is sounded to indicate that the abnormality exists and the cause of the abnormality.

Seal construction for pump apparatus

An endless path calibration system comprising a sensor cassette having a flow-through passage and at least one sensor to be calibrated, a chamber coupled to the sensor cassette to define an endless path and a sterile calibration liquid in the endless path. A gas injection passage for injecting gas into the sterile calibration liquid and a gas vent leading from the endless path to the exterior of the endless path. A check valve allows gas to escape from the endless path and substantially prevents gas and liquid from entering the endless path through the gas vent.

Самодиагностирующийся рн-датчик

Устройство и способ для измерения импеданса потенциометрического электрода для диагностирования и непрерывного считывания результатов измерений параметров процесса. Колебания прямоугольной формы подаются на внешнюю схему 78,84, которая в свою очередь подключена к выходу группы электродов 13 через конденсатор 52. Выходной сигнал электрода 13 преобразуется в широтномодулированный импульсный сигнал и дискретизируется. Эти дискретизированные значения используются для определения импеданса и значения исследуемого выходного сигнала.

pH measurement system using a glass pH sensor

본 발명은 유리 pH 센서를 이용한 pH 측정시스템에 관한 것으로, 저항을 통한 외부 전원을 부가하여 유리 pH 센서의 시정수를 감소시켜 응답속도를 향상시키고, 유리 pH 센서의 특성을 산출하여 고장 여부를 진단할 수 있는 유리 pH 센서를 이용한 pH 측정시스템을 제공한다. 이를 위한 본 발명은 유리 pH 센서를 이용하여 용액의 pH를 측정하는 시스템에 있어서, 상기 유리 pH 센서의 등가 내부 저항값보다 10배이상 작은 저항값을 갖는 저항을 통하여 상기 유리 pH 센서로 전압을 인가하는 전원공급 수단과; 상기 유리 pH 센서의 출력 전압을 검출하는 검출 수단과; 상기 검출된 출력 전압을 기초로 상기 용액의 pH 값을 산출하는 산출 수단;을 포함하는 것을 특징으로 한다. The present invention relates to a pH measurement system using a glass pH sensor, by adding an external power source through the resistance to reduce the time constant of the glass pH sensor to improve the response speed, calculate the characteristics of the glass pH sensor to diagnose the failure The present invention provides a pH measurement system using a free pH sensor. The present invention for this purpose in the system for measuring the pH of the solution using a glass pH sensor, applying a voltage to the glass pH sensor through a resistance having a resistance value 10 times less than the equivalent internal resistance value of the glass pH sensor Power supply means; Detection means for detecting an output voltage of the glass pH sensor; And calculating means for calculating a pH value of the solution based on the detected output voltage. 상기와 같은 구성에 의해 본 발명은 유리 pH 센서의 동특성에 따른 시정수를 감소시켜 응답속도를 향상시키고, 유리 pH 센서의 등가 내부 저항값 및 전원을 산출하여 유리 pH 센서의 고장여부를 진단할 수 있는 효과가 있다. By the above configuration, the present invention can improve the response speed by reducing the time constant according to the dynamic characteristics of the glass pH sensor, calculate the equivalent internal resistance value and the power of the glass pH sensor to diagnose the failure of the glass pH sensor. It has an effect. 유리 pH센서, 유리 전극, 센서진단, 내부 저항, 시정수 Glass pH Sensor, Glass Electrode, Sensor Diagnosis, Internal Resistance, Time Constant

Arrangement for detecting chemical equalization processes in a hydrous solution

A description is given of an arrangement for detecting chemical equalisation processes in an aqueous solution, in particular for determining pHs and/or redox potentials. The arrangement, a so-called alternating probe, comprises an essentially cylindrical probe body (1) with a calibration chamber (6) and an immersion tube (7) which can be moved axially in a central axial bore of the probe body (1) and which has at its front end a protective cylinder (8) which is perforated in basket fashion in the region (9) adjoining the immersion tube (7). Inserted in the immersion tube (7) is an electrode (14) whose head is situated in the perforated region (9). An annular gap (10) between the immersion tube (7) and the inner wall (3) of the probe body (1) is sealed with at least three O-rings (11, 12, 13) arranged at a distance (d1, d2) from one another and fitted on the inner wall (3) of the probe body (1). The first O-ring (11) is above the calibration chamber (6) and the second and third O-ring (12 and 13) are situated below the calibration chamber (6), and the distance (d1, d2) between every two adjacent O-rings (11 and 12, or 12 and 13) is of larger size than the length (1) of the perforated region (9). …<IMAGE>…

Arrangement for detecting chemical equalization processes in a hydrous solution

pH METER

복합체 물질로부터 제조되며, 선택적으로, 마이크로제조 기술을 이용하는 전압 측정 센서가, 10 마이크로리터 하에서 샘플 볼륨 내 애널라이트의 검출을 가능하게 한다. A voltage measuring sensor made from a composite material, optionally using microfabrication technology, enables detection of analyte in a sample volume under 10 microliters.

PH indicator

Ion concentration analysis and apparatus employing standard addition techniques

Analysis of a series of samples is carried in an electrode cell (10) containing an ion-selective electrode (11). A base solution, to which a trace of the ion to be measured has previously been added, is run into the cell (10). To perform an analysis a small volume of solution, containing a known concentration of the ion is added, followed by an identical volume of sample. The pX or mV measurement before and after each of the two additions is recorded and the analytical result calculated. After analyzing the first sample, the cell is drained, without rinsing and the second sample analyzed in the same way. No blank determination is required. In more sophisticated versions of the technique, at least two additions of standard are made, one before and one after the sample.

Ion concentration analysis

Analysis of a series of samples is carried out in an electrode cell (10) containing an ion-selective electrode (11). A base solution, to which a trace of the ion to be measured has previously been added, is run into the cell - (10). To perform an analysis a small volume of solution, containing a known concentration of the ion is added, followed by an identical volume of sample. The pX or mV measurement before and after each of the two additions is recorded and the analytical result calculated. After analysing the first sample, the cell is drained, without rinsing, and the second sample analysed in the same way. No blank determination is required. In more sophisticated versions of the technique, at least two additions of standard are made, one before and one after the sample.

Automatable measuring, cleaning and/or calibrating device for electrodes for measuring pH values or redox potentials

The present invention relates to an automatable measuring, cleaning and/or calibrating device for electrodes for measuring pH values or redox potentials, in particular in process technology, with a measuring transducer ( 8 ) that has a programmable process computer for executing process steps, and with a control unit ( 10 ) that has a plurality of actuators ( 44 ) and/or signal inputs ( 42 ) and/or signal outputs ( 40 ). A functional separation between the measuring transducer ( 8 ) and the control unit ( 10 ) is provided so as to be able to program the device more effectively, data being exchanged via a bidirectional communication link ( 13 ).

Method for testing the reactivity of a chemical sensor and device for carrying out said method

The invention relates to a method for testing the reactivity of a chemical sensor for gaseous and/or liquid media, especially for determining a pH value, whereby the sensor, when inspected, is impinged upon with a comparative medium in a test routine and a comparative sensor value is detected. The inventive method is characterized by the steps of operating the sensor in a measuring mode and switching from said measuring mode to the test routine, supplying the comparative medium to the sensor and detecting and storing the sensor values regarding the comparative medium, and comparing sensor values regarding the comparative medium detected at subsequent intervals and stored and deducing a statement regarding the condition of the sensor from the change of sensor values regarding the comparative medium which were recorded at different intervals.

Method for checking the reactivity taking into account the new condition (basic properties) of an electronic sensor and apparatus for carrying out the method called basic curve comparison method

Die Erfindung betrifft ein Verfahren zur Überprüfung der Reagierfähigkeit eines elektrischen und/oder elektronischen Sensors für gasförmige und/oder flüssige Medien, insbesondere einer Messelektrode zur Ermittlung chemischer oder physikalischer Größen, nach einer das Ansprechverhalten des Sensors bezüglich des zu messenden Mediums beeinträchtigenden Versottung oder Belegung der Sensoroberfläche durch das Prozessmedium (Umgebungsmedium) oder darin enthaltene Bestandteile, wobei der Sensor bei der Überprüfung im Rahmen einer Testroutine mit einem Vergleichsmedium beaufschlagt und ein Vergleichs-Sensorwert erfasst wird. Dieses Verfahren erweitert alle bisher bekannten Kalibrierorgänge um das Erfassen, Vergleichen, Bewerten und Dokumentieren von mehreren Messwertreihen mittels Vergleichskurven hinsichtlich dem „Neuzustand/Basiszustand” des Sensors zum Ist-Zustand des Sensors unter Einbeziehung einer Reinigungs- und einer Nachprüfphase. Ziel ist es, den Sensor auf dem Niveau seines „Neuzustands/Basiszustands” zu halten um Nachjustierungen zu vermeiden. Auch das Ansprechverhalten/die Trägheit zwischen der Erstjustierung und einer eventuellen Nachjustierung des Sensors wird lückenlos entsprechend den gesetzlichen Vorgaben von Ämtern/Behörden, als Nachweis dargestellt. Da sich alle Sensorinformationen auf dem Niveau seines „Neuzustand/Basiszustand” mittels Vergleichskuren beziehen, wird das Verfahren als Basiskurven-Vergleichsverfahren bezeichnet. The invention relates to a method for checking the reactivity of an electrical and / or electronic sensor for gaseous and / or liquid media, in particular a measuring electrode for determining chemical or physical quantities, according to a sooting of the sensor with respect to the medium to be measured sooting or occupancy Sensor surface through the process medium (surrounding medium) or components contained therein, wherein the sensor is subjected to the review as part of a test routine with a comparison medium and a comparison ...

Method for checking the reactivity of an electrical and / or electronic sensor

Verfahren zur Überprüfung der Reagierfähigkeit eines elektrischen und/oder elektronischen Sensors für gasförmige und/oder flüssige Medien, zur Ermittlung chemischer oder physikalischer Größen, nach einer das Ansprechverhalten des Sensors bezüglich des zu messenden Mediums beeinträchtigenden Versottung oder Belegung der Sensoroberfläche durch Prozessmedium oder darin enthaltene Bestandteile, wobei der Sensor bei der Überprüfung im Rahmen einer Testroutine mit einem Vergleichsmedium beaufschlagt und ein Vergleichs-Sensorwert erfasst wird und dazu der Sensor aus einem Prozessmodus in die Testroutine umgeschaltet wird und dabei das Vergleichsmedium zum Sensor geführt wird und wobei bezogen auf das Vergleichsmedium Sensormesswertreihen erfasst und abgespeichert werden und die mit zeitlichem Abstand nacheinander erfassten und abgespeicherten Sensormesswertreihen bezogen auf das Vergleichsmedium miteinander verglichen werden und daraus eine Aussage über den Zustand des Sensors aus der Veränderung und zeitlichen Entwicklung von zu unterschiedlichen Zeitpunkten aufgezeichneten Sensormesswertreihen bezogen auf das Vergleichsmedium abgeleitet wird, wobei - im Verlauf der ersten Inbetriebnahme des Sensors zur Erstellung einer Basiskurve für diesen Sensor, manuell oder automatisch, in einer festgelegten Reihenfolge von Verfahrensphasen, nacheinander mindestens ein Vergleichsmedium, als nächstes ein Reinigungsmedium und zum Schluss noch ein Vergleichsmedium, welches zur Nachkontrolle dient, zugeführt wird; - Anhaftungen, Schmutz, Beläge und andere Verunreinigungen und Rückstande am Sensor mit nur einem Reinigungszyklus und mit so wenig Reinigungsmedium wie möglich entfernt werden; - ein optimaler Zeitpunkt der Reinigung, in Abhängigkeit von der jeweiligen Anwendung sowie unter Einbezug eines festgelegten, zulässigen Toleranzbereichs festgelegt wird; - bei jeder Zuführung eines definierten Mediums in einer Verfahrensphase jeweils eine zugehörige Sensormesswertreihe als Basiskurve ...

Method for calibrating an electrometric pH measuring device and a device for carrying out the method

Method and device for the calibration of chemical sensors

Method and device for calibrating chemical sensors employing, in particular, in the potentiometric measurement technique. The electrode system concerned is immersed in a standardised calibration solution. It comprises a receiving means (auxiliary sensors) which are activated on immersion in the calibration solution concerned and cause a calibrating electronic system to calibrate the output signal of the indicating electrode of the chemical sensor at least with respect to one calibration point (origin and/or slope). <IMAGE>

Process for automatic calibration of an electrical meter using potentiometric measuring chains, especially pH electrodes

Process for automatic calibration of an electrical meter using potentiometric measuring chains, especially pH electrodes, in which successively voltages output by the potentiometric measuring chain in at least two different calibration solutions are detected and, based on these voltages and using stored buffer values of conventional calibration solutions, the characteristics of the electrode are automatically calculated. To this end, voltages output by the potentiometric measuring chain successively in two calibration solutions are first registered, the temperatures of the calibration solution being recorded via a connected temperature sensor. Based on the voltages and temperatures measured and on permanently stored buffer values, characteristics such as the slope and the asymmetry potential of the electrodes are now directly calculated, using all the possible combinations, until the characteristics are within limits which make sense in terms of the measurement.

Measurement of pH and specific ion concentration

A microprocessor-controlled pH and ion concentration meter is disclosed with improved calibration and testing procedures. For calibration (standardization), the meter stores number pairs (pX a , E a ), (pX b , E b ) where the pX values may be pH values (e.g., 4.00 and 7.00) and the E values are expressed in mV/deg K. When multiple standard values are stored, remeasuring one (e.g., replacing E a1 by E a2 ) can be used to update the others (e.g., E b1 to E b2 ) without remeasurement by applying the formula: E.sub.b2 =E.sub.b1 +(E.sub.a2 -E.sub.a1). Additionally, the meter can be tested for excessive internal bias current by measuring the potential (V1) when the meter is connected to a circuit of low impedance and the potential (V2) when the meter is connected to a circuit of the same voltage source but of known high impedance and having the meter compare (V2-V1) to a preset limit value.

Improved pH and concentration meter

The present application describes an electrochemical metering apparatus that provides for convenient storage and presentation of the analytical electrode, simple assembly, and two calibration modes. The apparatus includes an electrode storage (50) and presentation assembly (30) that permits the user to introduce the electrode into a sample solution while simultaneously observing the meter's output (42), and store the electrode when not in use. All structural components are intended to fit together with interlocking tabs and windows. A serial port (77) fits within the construction of the main housing without the need for bolts, and battery clips (85) that depend directly from the circuit board obviate the need for wiring connections. Two calibration modes are featured. A "segment addition" mode permits separation of the voltage/concentration curve into individually plotted regions, the number of which depends on the number of reference solutions used in the calibration procedure. The segment corresponding most closely to the measured potential of a sample solution is used to calculate concentration. In an alternative calibration mode, one or more reference solutions are used to establish metered voltage/concentration combinations that are compared with expected, known values. Any discrepancies therebetween furnish a "noise level" value associated with the apparatus that can be used to more precisely define the orientation of the voltage/concentration curve.

Output circuit for analogically indicating a measure signal, which is offset and gain corrected, and method for indicating the measuring signal

An output circuit for the analog indication of a measurement signal compensated with respect to slope and null, of an ion or redox-potential-sensitive measurement series is specified, comprising a signal input (1) for feeding in the measurement signal, an A/D converter (3) connected to the signal input, a control device (4) connected to the A/D converter, possibly a temperature measuring device for detecting the temperature of the measurement series which is connected to the control device, and a signal output (7). As a rule, in the compensation of the measurement signal, a digital/analog conversion of the compensation quantities is necessary which leads to discontinuities or steps in the output voltage. This is disadvantageous if the output voltage is intended to drive, for example, a recorder which should actually record a continuous signal. To solve this problem, the signal input is also connected to an amplifier (6), the gain factor and null shift of which can be set by the control device (4), the output of the amplifier (6) being connected to the signal output (7). <IMAGE>

Method for in-situ calibration of ion-sensitive electrodes, in particular glass electrodes, and device for carrying out the method

Verfahren zum in-situ-Kalibrieren von ionensensitiven Elektroden, insbesondere von Glaselektroden, dadurch gekennzeichnet, daß die zu kalibrierende ionensensitive Elektrode in eine Meßlösung eingebracht wird, ein dem pH-Wert der Meßlösung entsprechendes Meßsignal aufgenommen und registriert wird, nach einem durch die Genauigkeitsanforderungen bestimmten Zeitintervall, das zwischen 2 Stunden und 150 Stunden liegt, aus zwei Kapillaren nacheinander zwei verschiedene Kalibrierungsflüssigkeiten mit einer Fließgeschwindigkeit von 3 bis 10 ml/min auf die Membranoberfläche der ionensensitiven Elektrode geleitet werden, nach einer Zeit von 2 min bis 4 min die Zufuhr von Kalibrierungsflüssigkeit gestoppt wird und die Messung des pH-Wertes fortgesetzt wird. Method for in-situ calibration of ion-sensitive electrodes, in particular glass electrodes, characterized in that the ion-sensitive electrode to be calibrated is placed in a measuring solution, a measurement signal corresponding to the pH value of the measurement solution is recorded and registered, after a time interval determined by the accuracy requirements, which is between 2 hours and 150 hours, two different calibration liquids are passed from two capillaries in succession at a flow rate of 3 to 10 ml / min onto the membrane surface of the ion-sensitive electrode, after a period of 2 minutes to 4 minutes, the supply of calibration liquid is stopped and the measurement of the pH value is continued.

Process for automated pH measurement and calibration and device for carrying out the process

Verfahren zur automatisierten pH-Messung und Kalibrierung von als Einstabmeßkette ausgebildeten ionensensitiven Elektroden, insbesondere von Glaselektroden, dadurch gekennzeichnet, daß die sensitive Membran der ionensensitiven Elektrode im Meßmodus durch eine aus einer ersten Kapillare ausströmenden Meßlösung mit 0,01 ml/min bis 5 ml/min angeströmt wird, ohne dabei in die Meßlösung einzutauchen, das Meßsignal aufgenommen und registriert wird, nach einem durch die Genauigkeitsanforderungen bestimmten Zeitintervall, das zwischen 2 Stunden und 150 Stunden liegt, nacheinander durch weitere Kapillaren mit Kalibriertlüssigkeiten in gleicher Weise wie im Meßmodus angeströmt wird, nach einer Zeit von 1 min bis 2 min die Zufuhr der Kalibrierflüssigkeit gestoppt wird und die pH-Messung durch Anströmen mit Meßlösung fortgesetzt wird. Method for automated pH measurement and calibration of ion-sensitive electrodes designed as single-rod electrodes, in particular glass electrodes, characterized in that the sensitive membrane of the ion-sensitive electrode in the measuring mode by a measuring solution flowing out of a first capillary at 0.01 ml / min to 5 ml / min is flowed without immersing in the measurement solution, the measurement signal is recorded and registered, after a time interval determined by the accuracy requirements, which is between 2 hours and 150 hours, flowed through in succession through further capillaries with calibration liquids in the same way as in the measurement mode, after a time of 1 min to 2 min the supply of the calibration liquid is stopped and the pH measurement is continued by the flow of measuring solution.

Digital calibration system for an electronic instrument

In a pH measuring instrument, automatic calibration (sloping) is performed by placing the pH electrode in a standard solution, dialing the pH of this standard solution into a decade thumb wheel switch, and depressing the slope switch. The measurement voltage from the electrode is converted to a binary coded digital signal. This signal and the digital signal from the thumb wheel switch are applied to a binary adder which produces a multiple bit output representing the difference. Clock pulses are supplied to a reversible digital counter which counts in a direction specified by the most significant bit of the binary adder output. The count in the reversible counter, representing the error, is converted to an analog signal which is used to control the reference voltage in a ratio system to produce a calibrated reading. The supply of clock pulses to the counter is automatically stopped when the error is zero.

METHOD AND DEVICE FOR MEASURING ION CONCENTRATIONS

Measurement of ph and specific ion concentration

A microprocessor-controlled pH and ion concentration meter is disclosed with improved calibration and testing procedures. For calibration (standardization), the meter stores number pairs (pX a , E a ), (pX b , E b ) where the pX values may be pH values (e.g., 4.00 and 7.00) and the E values are expressed in mV/deg K. When multiple standard values are stored, remeasuring one (e.g., replacing E a1 by E a2 ) can be used to update the others (e.g., E b1 to E b2 ) without remeasurement by applying the formula: E b2 = E b1 + (E a2 - E a1 ). The meter can be tested for excessive internal bias current by measuring the potential (V1) when the meter is connected to a circuit a known voltage (E1) of low impedance and the potential (V2) when the meter is connected to a circuit of the same voltage source (E1) but of known high impedance and having the meter compare (V2 - V1) to a preset limit value. The meter can be tested for low internal impedance by further measuring the potential (V4) when the meter is connected to a circuit of a second external voltage (E2) and the known high impedance (R1). The meter then calculates: (V4 - V2) and compares that value to preset limits based upon E1, E2 and R1. Such limits can be derived as (Z₀)(E2-E1) / (R₁ + Z₀) wherein Z₀ is the minimum acceptable internal impedance.

Measurement of pH and specific ion concentration

A microprocessor-controlled pH and ion concentration meter is disclosed with improved calibration and testing procedures. For calibration (standardization), the meter stores number pairs (pX a , E a ), (pX b , E b ) where the pX values may be pH values (e.g., 4.00 and 7.00) and the E values are expressed in mV/deg K. When multiple standard values are stored, remeasuring one (e.g., replacing E a1 by E a2 ) can be used to update the others (e.g., E b1 to E b2 ) without remeasurement by applying the formula: E b2 = E b1 + (E a2 - E a1 ). The meter can be tested for excessive internal bias current by measuring the potential (V1) when the meter is connected to a circuit a known voltage (E1) of low impedance and the potential (V2) when the meter is connected to a circuit of the same voltage source (E1) but of known high impedance and having the meter compare (V2 - V1) to a preset limit value. The meter can be tested for low internal impedance by further measuring the potential (V4) when the meter is connected to a circuit of a second external voltage (E2) and the known high impedance (R1). The meter then calculates: (V4 - V2) and compares that value to preset limits based upon E1, E2 and R1. Such limits can be derived as (Z₀)(E2-E1) / (R₁ + Z₀) wherein Z₀ is the minimum acceptable internal impedance.

Improved ph and concentration meter

Device for potentiometric determination of concentration of ions in solutions

Изобретение относитс  к аналитической химии и может найти применение в потенциометрическом анализе. Целью изобретени   вл етс  ускорение процесса определени  концентрации ионов в растворах. Интегральный чувствительный элемент 1, состо щий из чувствительных частей ионселективных электродов 2 - 4, выполненных в форме капилл ров из чувствительного стекла, контактирует с анализируемым раствором 5 через чувствительную часть 3. Дл  проведени  калибровки интегрального чувствительного элемента измер ют разность потенциалов между электродами сравнени  7 и 8 и по значению этого потенциала рассчитывают крутизну электродной характеристики чувствительных элементов без введени  эталонного раствора в чувствительную часть, контактирунмцую с анализируемым раствором. 1 ил. СО i: О4 This invention relates to analytical chemistry and can be used in potentiometric analysis. The aim of the invention is to accelerate the process of determining the concentration of ions in solutions. The integral sensitive element 1, consisting of sensitive parts of ion-selective electrodes 2-4, made in the form of capillaries made of sensitive glass, contacts the analyzed solution 5 through the sensitive part 3. To calibrate the integral sensitive element, a potential difference is measured between reference electrodes 7 and 8 and the value of this potential is used to calculate the slope of the electrode characteristic of sensitive elements without introducing a reference solution into the sensitive part, which taktirunmtsuyu with the test solution. 1 il. CO i: O4

Sensor with memory storing calibration information

A sensor is configured to sense a parameter of an aqueous liquid. The sensor has an analog output port configured to provide an analog signal indicative of a sensed parameter, and a calibration memory device storing individual digital information indicative of a calibration of the sensor. A digital output port provides a digital signal indicative of the digital information. A treatment system and method is matched to the sensor.

Patent RU2015139562A3

`”ВУ“” 2015139562” АЗ Дата публикации: 27.06.2018 Форма № 18 ИЗ,ПМ-2011 Федеральная служба по интеллектуальной собственности Федеральное государственное бюджетное учреждение ж 5 «Федеральный институт промышленной собственности» (ФИПС) ОТЧЕТ О ПОИСКЕ 1. . ИДЕНТИФИКАЦИЯ ЗАЯВКИ Регистрационный номер Дата подачи 2015139562/15(060868) 08.10.2014 РСТ/ЕР2014/071520 08.10.2014 Приоритет установлен по дате: [ ] подачи заявки [ ] поступления дополнительных материалов от к ранее поданной заявке № [ ] приоритета по первоначальной заявке № из которой данная заявка выделена [ ] подачи первоначальной заявки № из которой данная заявка выделена [ ] подачи ранее поданной заявки № [Х] подачи первой(ых) заявки(ок) в государстве-участнике Парижской конвенции (31) Номер первой(ых) заявки(ок) (32) Дата подачи первой(ых) заявки(ок) (33) Код страны 1. 1317746.4 08.10.2013 ОВ Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) УСТРОЙСТВО ДЛЯ ОПРЕДЕЛЕНИЯ рН И СОСТАВ Заявитель: СМИТ ЭНД НЕФЬЮ ПиЭлСи, СВ 2. ЕДИНСТВО ИЗОБРЕТЕНИЯ [Х] соблюдено [ ] не соблюдено. Пояснения: см. Примечания 3. ФОРМУЛА ИЗОБРЕТЕНИЯ: [Х] приняты во внимание все пункты (см. Примечания) [ ] приняты во внимание следующие пункты: [ ] принята во внимание измененная формула изобретения (см. Примечания) 4. КЛАССИФИКАЦИЯ ОБЪЕКТА ИЗОБРЕТЕНИЯ (ПОЛЕЗНОЙ МОДЕЛИ) (Указываются индексы МПК и индикатор текущей версии) СОМ 31/22 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) СО1М№ 31/22, С01М 31/00, С01\ 31/02 5.2 Другая проверенная документация в той мере, в какой она включена в поисковые подборки: 5.3 Электронные базы данных, использованные при поиске (название базы, и если, возможно, поисковые термины): Езрасепе, Соозе, РАТЕМТСОРЕ, Рабеагсв, РиБМеа, КОРТО 6 ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к гория* относящихся к предмету поиска пункту формулы № 1 2 3 Хх 0$ ...

ELECTRODE COMPOSITIVE COMPOSITE, FOR AN ELECTROCHEMICAL MEASUREMENT, IN PARTICULAR AN ISFET-CONSTRUCTED COMPOSITION, AND METHOD FOR MANUFACTURING THE ASSEMBLY.

Ph meter with self-diagnosing function

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Mode and an arrangement for control over a supporting half-cell

FIELD: the invention refers to a mode and an arrangement for control over a supporting half-cell. SUBSTANCE: the essence of the invention is in the following: the supporting half-cell forms with a measuring half-cell a potentiometer measuring place for definition and/or control of concentration of ions in the sphere. At that the concentration of ions is defined with the help of at least one measuring signal received in the measuring circuit between the measuring and the supporting half-cells. According to the invention the measuring place is exploited periodically in a working and a testing regimes. At that in the working regime the concentration of ions is measured and the testing regime the functional capability of the supporting half-cell is controlled. EFFECT: the invention allows to purposefully control of the supporting half-cell of the measuring place on a misfunction. 12 cl, 4 dwg ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 301 419 (13) C2 (51) ÌÏÊ G01N 27/416 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2005118428/28, 13.11.2003 (72) Àâòîð(û): ÏÅÕØÒÀÉÍ Òîðñòåí (DE), ØÎËÜÖ Êàòðèí (DE), ÕÅÐÒÈà Ñâåí (DE) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 13.11.2003 (73) Ïàòåíòîîáëàäàòåëü(è): ÝÍÄÐÅÑÑ+ÕÀÓÇÅÐ ÊÎÍÄÀÊÒÀ ÃÌÁÕ+ÊÎ. Êà (DE) (43) Äàòà ïóáëèêàöèè çà âêè: 20.01.2006 R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 15.11.2002 DE 10253595.7 (45) Îïóáëèêîâàíî: 20.06.2007 Áþë. ¹ 17 2 3 0 1 4 1 9 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: SU 1783403 A1, 23.12.1992. ÅÐ 0241601 À, 21.10.1987. ÅÐ 0417347 À, 20.03.1991. DE 19539763 A1, 30.04.1997. SU 1536294 A1, 15.01.1990. SU 748224 À, 15.07.1980. (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 15.06.2005 2 3 0 1 4 1 9 R U (87) Ïóáëèêàöè PCT: WO 2004/046708 (03.06.2004) C 2 C 2 (86) Çà âêà PCT: EP 03/12668 (13.11.2003) Àäðåñ äë ïåðåïèñêè: 103735, Ìîñêâà, óë. Èëüèíêà, 5/2, ÎÎÎ "Ñîþçïàòåíò", ïàò.ïîâ. È.Ì.Çàõàðîâîé (54) ...

Sensor and manufacturing method thereof

고감도로 산 및 물을 동시에 감지 가능한 센서 및 그의 제조방법이 제안된다. 본 발명에 따른 센서는 기판; 및 기판 상에 형성된, 그래핀 및 전도성 고분자를 포함하는 감지전극;을 포함하고, 그래핀은 산화그래핀이 전도성 고분자에 의해 환원되어 형성되되 일부 산화영역을 포함한다. A sensor capable of simultaneously sensing acid and water with high sensitivity and a method of manufacturing the same are proposed. A sensor according to the present invention comprises: a substrate; And a sensing electrode formed on the substrate, the sensing electrode including a graphene and a conductive polymer, wherein the graphene is formed by reducing the graphene graphene by a conductive polymer, and includes a certain oxidizing region.

Measuring method for concentration using ion electrode

Methods and apparatus for measuring analytes

A method, computer program product, and system are provided to calibrate a sensor array with a plurality of sensors. The method can include sweeping a voltage of a reference electrode from a first voltage to a second voltage, where the reference electrode is in fluid communication with the sensor array. The output voltage of each of the plurality of sensors can be monitored at one or more voltages within the first and second voltages. An overall average gain of the plurality of sensors can be calculated at each of the one or more voltages. Further, an acquisition window for the sensor may can be determined. The acquisition window can include a maximum distribution of sensors that provides a maximal overall average gain at a particular reference electrode voltage.

Method and apparatus for calibration of a sensor array

A method, computer program product, and system are provided to calibrate a sensor array with a plurality of sensors. Preferably, the sensor array consists of a plurality of ISFETs which are in fluid communication with a reference electrode. A particular reference voltage is determined, which depends on the maximum value of the overall average gain of the sensors in an array, but also on a maximum number of sensors available for the measurement. The method includes sweeping a voltage of the reference electrode from a first voltage to a second voltage. The output voltage of each of the plurality of sensors is monitored at one or more voltages within the first and second voltages. The gain of each sensor at each of the one or more voltages is determined. An overall average gain of the plurality of sensors is calculated at each of the one or more voltages. Further, an acquisition window for the sensor array is determined. The acquisition window includes a maximum distribution of sensors that provides a maximal overall average gain at a particular reference electrode voltage.

Ph meter tester

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Automatic calibrating device of ph meter

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Disposable self-calibratable electrode package

This invention relates to solid-state electrode or micro-electrode sensor apparatus for measuring certain characteristics of an aqueous sample such as a body fluid or a blood sample and more particularly to such apparatus which employs a disposable cartridge containing a sensor or a bank of sensors for such characteristics and reagents used to calibrate the sensors.

Multiple use container for the packaging of fluids

Disclosed is a uniquely simple, multiple use apparatus for the packaging of fluids, such as those reference fluids used for the calibration and standardization of blood gas instrumentation, which must not be exposed to air.

Device for electrochemical measurements, in particular pH measurements, with a device for cleaning the measuring electrode and / or recalibrating a measuring chain

Die Erfindung betrifft einen Geber für elektrochemische, insbesondere pH-Messungen mit automatischer Reinigung und Eichung der Meßkette. Um den Verbrauch von Reinigungsmittel und Eichlösungen klein zu halten, wird die Meßkette so eingebaut, daß sie in eine kleine strömungsgünstig angeordnete Vertiefung taucht, welche nach Ablauf der Meßlösung als Reinigungs- und Eichgefäß dient. Die Zufuhr von Reinigungsmittel und Eichlösungen in die Vertiefung unter Verdrängen des Restes der Meßlösung erfolgt nach einem individuell festgelegten Programm. Der Ablauf der Meßlösung, als Vorbereitung der Reinigung und Eichung erfolgt aus einem Durchlaufgeber nach Abschalten der Umwälzung von selbst. In einem Eintauchgeber wird dies durch Druckluft in Verbindung mit einem Fallrohr bewirkt, so daß die automatische Reinigung und Eichung auch auf diesen Gebertyp anwendbar ist. The invention relates to a transmitter for electrochemical, in particular pH, measurements with automatic cleaning and calibration of the measuring chain. In order to keep the consumption of cleaning agents and calibration solutions low, the electrode is installed in such a way that it dips into a small well arranged in a flow-favorable manner, which serves as a cleaning and calibration vessel after the test solution has run out. The supply of cleaning agents and calibration solutions into the well, displacing the rest of the measurement solution, takes place according to an individually defined program. The flow of the measurement solution, as preparation for cleaning and calibration, takes place automatically from a flow sensor after switching off the circulation. In an immersion sensor, this is effected by compressed air in connection with a downpipe, so that the automatic cleaning and calibration can also be used on this type of transmitter.

The method and measurement website of operation measurement website

本发明涉及一种操作测量站点的方法以及测量站点。在操作用于确定介质的至少一个被测变量的测量站点的方法中，所述测量站点具有与所述介质接触用于检测测量值的至少一个传感器单元、以及具有显示元件的操作单元，其中，所述传感器单元无线或者有线地连接至所述操作单元以进行通信，其中，所述方法包括以下步骤：确定表示一直到将对传感器单元执行维护措施，尤其是校准的指定时间点的剩余时间跨度的第一值；确定表示所述传感器单元的当前状态的第二值；至少基于所述第一值和所述第二值来确定表示关于所述传感器单元的推荐动作的第三值；以及通过所述显示元件显示所述第三值或者来源于其的符号、或者来源于所述第三值的信号。

Method and apparatus for detecting a broken ph sensor

ABSTRACT OF THE DISCLOSURE A break in the enclosure of an electrochemical sensor, such as a pH sensor, is detected by including in the enclosure a set of elements which are spaced from each other and which are made of metals having dissimilar electrical potential and reactive characteristics. When moisture enters through the broken enclosure, an electrical potential is created between the elements which can be detected by a voltmeter. One of the elements is advantageously made of zinc and the other is advantageously made of silver or silver chloride coated silver. The elements in the form of ribbons or wires within the enclosure, may simply be portions of the leads connected to the half cell and reference electrode of the sensor. Salt may be included in the enclosure to produce an electrolyte when moisture enters the enclosure.

METHOD FOR THE METROLOGICAL RECORDING OF PHYSICAL VALUES OF LIQUIDS AND DEVICE FOR ITS EXECUTION

Ce procédé pour l'enregistrement métrologique de valeurs physiques de liquides avec une sonde de mesure, mise en présence du liquide, permet de manière simple et avec une très faible consommation de liquide l'enregistrement. La sonde de mesure 26, 56 est revêtue d'une pellicule de liquide appliqué sur la sonde sous forme de gouttelettes ou pulvérisé et renouvelée en permanence. Dans le dispositif pour l'exécution du procédé avec une soude de mesure en contact avec le liquide, il est prévu au moins une buse 20 dirigée vers la sonde de mesure 26 et raccordée à une source 64 du liquide dans l'alignement de la sonde de mesure 56. This method for the metrological recording of physical values of liquids with a measuring probe, placed in the presence of the liquid, allows the recording in a simple way and with a very low consumption of liquid. The measuring probe 26, 56 is coated with a film of liquid applied to the probe in the form of droplets or sprayed and constantly renewed. In the device for carrying out the method with a measuring sodium hydroxide in contact with the liquid, there is provided at least one nozzle 20 directed towards the measuring probe 26 and connected to a source 64 of the liquid in alignment with the probe. measurement 56.

Calibrating instrument for measuring ion concn. of surface water etc. - by comparison with standard reference data entered in microprocessor file

A first sample is made up with a known vol. of treated, e.g. distilled water to which is added a predetermined vol. of conditioning prod., e.g. an electrolyte to facilitate obtaining a signal from a measuring electrode immersed in the sample. A signal is derived from this first sample. To this first sample is now added a succession of doses of a standard soln. contg. a known concn. of free ions. A signal is taken after each dose is added. A second sample is made up with a known vol. of the soln. to be analysed and a predetermined vol. of conditioning prod., an electrode sample is derived from the second sample. To this second sample is now added a succession of doses of standard soln. A signal is taken after each dose is added. All the signals frome electrode are passed to a microprocessor which computes and memorises the data. The microprocessor can then define the law relating the quantity to be measured to the magnitude of signals detected. The process and appts. are used to calibrate instruments which automatically detect and measure concn. of ions in surface water e.g. cyanide, fluoride, chloride and nitrate ions.