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7318273 |
Method for producing pH probes
A method for producing a pH measuring probe includes: providing an electrode wire protruding out of both sides of a recording device, the electrode wire being fixed to the recording device with the...
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7276145 |
PH electrode
An object of the present invention is to suppress an electric potential drift as described above and improve pH measurement precision in order to obtain practical measurement precision in the...
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7270736 |
Electrode system for electrochemical sensor
The system concerns an electrode system for an electrochemical sensor, comprising, arranged on a conductive substrate ( 10 ), a plurality of micro-discs ( 22 ) electrically connected to the...
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7182847 |
System and probe for monitoring pH levels of a sample medium
A system for monitoring a pH level of a sample medium is disclosed herein as including a pH probe having a pH-sensitive electrode, a reference electrode and a temperature electrode arranged within...
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7041209 |
pH-sensitive amperometric biosensor
The present invention describes a new electrochemical biosensor comprising (i) a biocatalyst producing a pH change when interacting with the analyte to be determined and (ii) a compound exhibiting...
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6884332 |
Method and apparatus for treating an aqueous electroplating bath solution
A method and apparatus for treating an aqueous electroplating bath solution. The method comprises continuously agitating the solution; adjusting the pH of the solution, adjusting the temperature of...
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6860984 |
pH electrode and methods of preparing and using same
A pH electrode having a pH-sensitive region on an electrically conductive support, said pH-sensitive region comprising
a mixture of between 50% and 85% of the total mixture by weight of...
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6841292 |
Hydrogen sensor for fuel processors of a fuel cell
A method and apparatus estimate hydrogen concentration in a reformate stream produced by a fuel processor of a fuel cell. A sensor measures carbon monoxide, carbon dioxide, and water in the...
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6663756 |
Microchip-type oxygen gas sensor based on differential potentiometry
Disclosed is a microchip-based differential-type potentiometric oxygen gas sensor, which comprises a working electrode and a reference electrode. The working electrode is composed of a...
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6653842 |
Galvanic probes as pH and oxidation reduction potential sensors, control devices employing such probes, and related methods
A galvanic probe comprises a sensor electrode and a reference electrode. The sensor electrode has an exposed surface that comprises a noble metal or antimony or bismuth, and, optionally, an oxide...
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6579440 |
Replaceable reference junction including an ion-barrier for an electrochemical sensor
A reference junction for a reference half-cell, the reference junction including an ion-barrier membrane and being sized and shaped for removable receipt within a receptacle of a reference...
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6572748 |
Reference electrode
A reference electrode ( 1 ) for electrochemical measurements includes a metallic palladium-containing electrode component ( 3 ) which is covered by a layer ( 4 ) formed of or containing a palladium...
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6475438 |
Field test apparatus for analysis of coolants and heat-exchange fluids
A test method and apparatus for determining the content of carboxylic acid-based corrosion inhibitors in a coolant or heat exchange fluid. The amount of acidic reagent added to the coolant or fluid...
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6464940 |
pH sensor and pH measurement method employing the same
A pH sensor is provided capable of readily determining the pH of a solution of a small amount. The pH sensor includes a semiconductor substrate, an oxide film provided on the semiconductor...
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6416653 |
Device for separating electrolyte chambers within an electrochemical sensor
The present invention is drawn generally to an improved electrochemical sensor. The reference cell within the sensor can be a salt bridge comprising at least two chambers for containing an...
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6416646 |
Method of making a material for establishing solid state contact for ion selective electrodes
A polymeric material which to form a stable, reproducible interface between the ionic and electronic domains of an ion selective sensor, or an ion selective field effect transistor, or the like is...
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6395158 |
PH sensor with electrical noise immunity
A sensor for measuring pH of a solution includes a housing with an exterior surface for exposure to the solution. A measuring glass electrode within a tubular circuit ground electrode extends...
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6355158 |
Method of measuring pH
The present invention provides a means to substantially decrease the pH bias that is commonly observed with pH data obtained using ion selective electrode (ISE) containing instruments that have a...
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6306284 |
Apparatus and method for monitoring fluorine ions
An apparatus and a method for determining concentration of fluorine ions in aqueous solutions are provided. In the apparatus, a pH sensor is provided for sensing a pH value of an aqueous solution...
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6299754 |
PH sensitive reference electrode in electrolytic desilvering
An apparatus is disclosed for electrolytic desilvering of photographic processing solutions, more particularly fixing solutions or bleach-fixing solutions, comprising an electrolysis unit equiped...
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6235491 |
Assay utilizing magnetic particles
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6214206 |
Use of a chemical sensor
A chemical sensor (1) for selectively detecting an analyte in a solution as described. The sensor comprises a flow-through chamber (2), a selective membrane (3), a transducer means (4), an inlet...
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6193865 |
Analytic cell
Electrochemical cell having a porous substrate and a first and a second electrodes separated by an ion diffusion inhibiting partition is disclosed. The ion diffusion inhibiting partition between...
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6168707 |
Ion measurement apparatus and methods for improving the accuracy thereof
The accuracy and temperature-independence of ion-selective electrode meters having a logarithm resistance temperature correction incorporated therein is enhanced by using a microprocessor...
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6146514 |
Apparatus and method for measuring acidity
An acidity measuring apparatus includes a measuring container for accommodating an electrolyte solution including one of a 1,2-benzoquinone derivative and a 1,4-benzoquinone derivative, an organic...
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6139707 |
pH electrode arrangement
A pH electrode arrangement comprises an inner wire electrode of silver sulfide, and a fill solution comprising a solution of sodium thiosulphate, a buffer, and an antioxidant. The arrangement has a...
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6123827 |
Method for calibrating sensors used in diagnostic testing
A method is disclosed for reliably calibrating a sensor used in diagnostic sensing of a predetermined parameter, e.g., CO 2 partial pressure, O 2 partial pressure, or pH, of a solution such as...
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6066249 |
Method for calibrating an instrument for measuring electrolytes and metabolites by analysis of blood gases
A method for calibrating an instrument for the analysis of blood gases which possesses ion-sensitive electrodes and gas-sensitive electrodes and is used for the determination, in a biological...
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6022463 |
Sensors with subminiature through holes
The present invention is a sensor having an electrode formed in electrical contact with a subminiature through hole. Because of the small diameter of the through hole, the material that fills the...
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5993640 |
Method of measuring the CaCO.sub.3 content of a scrubbing suspension, especially for a flue gas desulfurizing absorber
The CaCO 3 content of a scrubbing suspension, especially for a desulfurizing apparatus for flue gas is measured by injecting an acid into a constant mass flow of the suspension circulating along a...
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5945830 |
Flow through fluid pH and conductivity sensor
A sensor for measuring pH and conductivity for liquids is disclosed. The sensor includes a housing having a pH cell and a conductivity cell. A pH fluid flow path is defined between a pH cell fluid...
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5921922 |
Measuring of bloodgases
A method and an equipment for determining components, particularly pH, pO 2 and pCO 2 in blood. In order to facilitate the determination of blood gases, one sensor is used for measurement of...
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5911873 |
Apparatus and method for operating an ISFET at multiple drain currents and gate-source voltages allowing for diagnostics and control of isopotential points
An apparatus for measuring ion concentration of a solution includes an ion sensitive field effect transistor (ISFET), a reference device, an ISFET control circuit, a memory, a measurement circuit...
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5848965 |
Method and a system for the determination of pH and other fluid parameters utilizing a metal monocrystalline electrode
A method and system for the determination of the pH of a fluid by measuring the pH of the fluid and thereafter correcting the pH based upon the determination of measured and/or adjusted values of...
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5693204 |
Passive pH adjustment for analytical instruments
An apparatus for adjusting the pH of an electrolytically dissociated process stream is disclosed. The apparatus includes a matrix of pH adjusting chemical and an erosion rate modifier. The pH...
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5658451 |
Method for calibration of a pH measuring element
In a method for calibration of a pH measuring element whose ion-permeable, hydrophilic polymer layer is brought into contact with an aqueous solution prior to calibration, the aqueous solution is...
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5597463 |
Device for electrochemical measurements
A titration electrode device for measuring the amount of a species in solution in a test liquid comprises a counter electrode and a generator electrode both in a chamber for receiving a thin layer...
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5582699 |
pH glass electrode
In the pH glass electrode comprising a double-walled glass tube in which an electrical screen is provided between the walls, the inner glass tube is sealed at one end with a glass lid and at the...
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5578194 |
Calibration of electrodes
A CO 2 electrode can be calibrated with two PCO 2 calibration standard solutions having known pH values and known bicarbonate ion source concentrations. An O 2 electrode can be calibrated using...
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5573798 |
Method of manufacturing an electrode for measuring pH
This invention relates to a pH measuring electrode having a sensor film which is sensitive to a hydrogen ion (H + ) in the solution. The pH measuring electrode of this invention has a sensor film...
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5556760 |
Method for assaying urease
A method for assaying an enzyme on a targeted solid body surface, including the steps of contacting an end opening of a thin tube with a targeted solid body surface to form a space between the...
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5556534 |
Electrochemical oxygen and PH sensors employing fluoride based solid-state electrolytes
Electrochemical sensors and methods for their use are provided for the detection of the pH and/or oxygen concentration in an aqueous medium. The subject sensors comprise a closed-end cylinder...
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5507936 |
Member for the formation of at least one electrode and/or one sensor
A member has a solid carrier and a thin oxide layer which is arranged thereon and consists of iridium oxide and/or possibly at least one oxide of at least one other metal belonging to the fifth or...
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5505828 |
Calibration solutions useful for analysis of biological fluids and methods employing same
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO 2 , and optionally, for concurrent analysis of O 2 , especially in combination...
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5456810 |
Methods of measuring and controlling activity of zinc phosphate treatment solution
A prescribed amount of a simple fluoride is added to a zinc phosphate treatment solution, which is a target solution, the HF concentration in the target solution is measured with a silicon...
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5437773 |
Method for monitoring environmental and corrosion
A corrosion sensor array incorporating individual elements for measuring various elements and ions, such as chloride, sulfide, copper, hydrogen (pH), etc. and elements for evaluating the...
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5405510 |
Portable analyte measuring system for multiple fluid samples
A portable, ready-for-use analyte measuring device is provided for the measurement of multiple sequential fluid samples. The device has a disposable cartridge, a calibrating fluid external to the...
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5391271 |
Method of monitoring acid concentration in plating baths
A method of monitoring the concentration of certain plating bath major constituents such as acid is provided which is insensitive to the effects of hydrogen produced during plating. The method...
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5346606 |
Electrochemical sensor
An electrochemical sensor wherein the salt bridge is a unitary plug of semipermeable material which is saturated with an electrolyte. The plug has a spiral cut from its outer surface to the central...
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5330634 |
Calibration solutions useful for analyses of biological fluids and methods employing same
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO 2 , especially in combination infusion fluid delivery/blood chemistry analysis...
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