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5401376 |
Electrochemical sensors
An electrochemical sensor having a substrate, conductive strips deposited on the substrate, and a layer insulating portions of the conductive strips except those portions which define a working...
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5395507 |
Electrochemical gas sensor
An electrochemical gas sensor comprises sensing and counter electrodes (1,2). A conduit (15) permits access of gas to the sensing electrode (1). An electrolyte reservoir (23). A porous, block-like...
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5395503 |
Zero volume electrochemical cell
Methods and apparatuses are described for determining the presence of an analyte in a sample suspected of containing the analyte. The method comprises contacting a concentrate of a determinable...
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5393391 |
Electrode arrangement for the electrochemical analysis of electrolytic components of a liquid
The present invention provides an electrode arrangement for the electrochemical analysis of components of a liquid, having a base body (7; 53; 85; 103; 139; 155; 175; 193), made of an insulating...
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5393399 |
Amperometric measuring device having an electrochemical sensor
An amperometric sensor device comprises in combination a sensor (21) having a planar structure obtained by photolithographic techniques and a circuit (22) for measuring the intensity of the...
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5389217 |
Measurement of bladder oxygen
An apparatus for the determination and continuous monitoring of bladder epithelial oxygen (pbO2) which comprises, in combination, an introductory catheter with an inflatable placement cuff and an...
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5385659 |
Reference electrode
A planar reference electrode for chemical sensors, which are able to be supplied with a measuring fluid and a calibrating fluid. The planar reference electrode has the following components: an...
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5384029 |
Electrochemical membrane sensor
An electrochemical membrane sensor 20 for immersion in a test fluid, such as wastewater, is used to sense desired chemical species, such as dissolved oxygen, within the test fluid. The sensor 20...
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5378344 |
Ion sensor
Disclosed is an ion sensor with its electrode covered with a water-repelling organic chemically adsorbed film, which is formed with at least one hole permitting the passage of ions and preventing...
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5376251 |
Carbon micro-sensor electrode and method for preparing it
A carbon micro-sensor electrode is disclosed which is prepared by impregnating, adsorbing or chemically modifying a pure composite carbon wire having many micropores extending to its surface and...
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5376255 |
Gas sensor
A planar gas sensor, in particular a pCO2 or pO2 sensor, has the following components: a pH sensor located on a flat substrate, or at least one noble metal electrode located on the substrate; a...
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5372696 |
Electrochemical sensor of modular design
An electrochemical sensor for fluid media with at least two electrodes, which are in contact with one another via an electrolyte and are accommodated in a housing. Many different sensor variants...
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5358619 |
Oxygen electrode
A small oxygen electrode and a method of bonding a fluorine resin film are disclosed. This small oxygen electrode includes a flat electrode substrate having at least two electrodes (a working...
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5356792 |
Biochemical oxygen demand analyzer and methods of analysis using Klebsiella microorganisms
The present invention relates to a BOD analyzer comprising a microbe sensor containing an oxygen electrode and a microbe membrane. The microbe membrane is made by immobilizing microorganisms...
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5354448 |
Electrochemical sensor
An electrochemical sensor for the determination of the partial pressure of oxygen in a bloodstream comprising a cathode and an anode immersed in an electrolyte contained in a chamber defined by an...
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5352349 |
Method for reviving an electrode of a biosensor
After a reverse bias is applied between a working electrode and a counter electrode or a reference electrode, a forward bias higher than a forward measurement bias is applied between the working...
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5352348 |
Method of using enzyme electrode
Disclosed is a method of assaying a high concentration of a substance in a liquid sample with a polarographic cell. The cell contains an electrode assembly that includes a reference electrode and a...
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5352352 |
Carbonic acid gas sensor
A sensor for detecting a carbonic acid gas dissolved in body fluids has a laminated structure including an outer plate having a carbonic acid gas permeable window, a plate for a pH-electrode having...
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5350500 |
Electrokinetic potential measurement
The measurement of electrokinetic potential is of importance in paper-making. A measuring cell (12) for a specific potential known as streaming potential of the kind disclosed in EP B1 0 079 726 is...
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5348862 |
Method for the rapid determination of the microorganism content of liquids and fluid solutions, and apparatus for implementing this method
Method for amperiometrically measuring the bacterial content of liquids in a bioelectrochemical cell wherein the mediator is initially oxidized in the cell, then brought into contact with a...
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5346605 |
Apparatus for quantitative determination of chemical oxidizing or reducing agents in a fluid environment
An apparatus for the quantitative determination of chlorine in a fluid environment, comprising a flat ion exchange membrane-based sensor which utilizes a layer of an electrochemically inert...
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5346604 |
Self-activating chemical sensor system
A gaseous oxygen electrochemical sensing system sustains inter-electrode ionic conductivity by the use of a combination of an hydrophilic coating layer on a gas-permeable barrier or separation...
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5344545 |
Electrolytic sensor for measuring the content of gas in a fluid
A gas sensor e.g. an oxygen sensor for testing body fluids, has a laminated structure with a cavity for holding a gel or liquid electrolyte in contact with a cathode and anodes formed by deposition...
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5344546 |
Electrical measuring cell for determinging ammonia, amines, hydrazine amines, hydrazine and hydrazine derivatives
The invention is directed to an electrochemical cell for measuring ammonia, amines, hydrazine and hydrazine derivatives and includes a measuring electrode in an electrolyte. The measuring electrode...
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5342490 |
Electrolytic detection of sulfur
A macrocyclic compound coated electrode may be used advantageously to detect and measure the concentration of sulfide in aqueous samples. The electrode is substantially unaffected by other...
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5338430 |
Nanostructured electrode membranes
A nanostructured composite film comprising a plurality of nanostructured elements, wherein the nanostructured elements are either two-component sub-microscopic structures comprised of whiskers...
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5338429 |
Electrochemical toxic gas sensor
A compact electrochemical gas sensor for detecting toxic gases is described which utilizes a fluted electrically-conducting feedthrough for making the electrical connection from outside the sensor...
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5338435 |
Integrated circuit hydrated sensor apparatus
A plastic covered nonconducting substrate with an electrical circuit means is secured to the extent to withstand the presence of liquids in contact with the substrate. The covered substrate can...
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5336388 |
Analyte and pH measuring sensor assembly and method
The sensor apparatus of the present invention includes on a nonconducting substrate electrically conductive pathways leading to at least two analyte electrodes and one reference electrode. The...
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5336390 |
Electrochemical gas sensor with disk-shaped electrodes, which are also electrical contact leads
An electrochemical gas sensor for detecting gaseous components in the environment has a diffusion membrane, a measuring electrode, a counterelectrode, and, if desired, a reference electrode,...
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5326449 |
Composite membrane
A sensor device for measuring the concentration of an analyte in solution is described. The device includes a composite membrane which incorporates a porous membrane containing an immobilized...
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5326447 |
Oxygen analyzer
An analyzer for detecting a selected chemical (such as oxygen) in a process fluid includes a plurality of electrodes that are separated from the fluid by a membrane that is permeable to the...
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5324665 |
On-line method for monitoring chloride levels in a fluid stream
A method for monitoring automatically, on-line chloride content in a fluid stream in an oil refinery. Additionally, the present invention provides a method for neutralizing the acids resulting from...
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5322602 |
Gas sensors
An improved perfluorinated, ion-exchange polymer, either in the form of a membrane or a thin film useful as the electrolyte in chemical sensors. The polymer is treated with an acid, such as boric...
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5320733 |
Sensor system
The invention relates to a sensor system for determining the moisture content in a gas to be measured. On the basis of two current saturation ranges during the determination of the moisture content...
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5320734 |
Test apparatus for measuring concentration of test substance in liquid
A test apparatus for measuring concentration of test solution, in which a thin sheet having a plurality of through holes and diffusion-limiting membranes to cover corresponding through hole, is...
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5316648 |
Electrochemical measuring cell for detecting gases and vapors
An electrochemical measuring cell has a three-electrode system including electrode, counter electrode and reference electrode in an electrolyte. The measuring cell has an additive promoting the...
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5316647 |
Portable oxygen analyzer
A hand held completely self-contained and shirt pocket size oxygen analyzer for secondary monitoring of oxygen percentage is formed of a housing that contains display and control electronics and a...
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5314605 |
Measuring cell for electrochemically detecting a gas
The invention is directed to a measuring cell for electrochemically detecting a gas sample and has at least one measuring electrode and one counter electrode disposed in a housing defining a...
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5314604 |
Sensor element for limit current sensors to determine the λ-value of gas mixtures
A sensor element for broad band sensors to determine the λ-value of gas mixtures is suggested. This sensor element can be manufactured in ceramic-sheet and screen-printing technology and is ...
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5310469 |
Biosensor with a membrane containing biologically active material
A sensor for measuring the concentration of an analyte in a solution is disclosed. The sensor may be adapted for use as either an amperometric or a potentiometric sensor. It includes a membrane...
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5304293 |
Microsensors for gaseous and vaporous species
A sensor for gaseous and vaporous species is disclosed. The sensor comprises an electrically insulated substrate which contains small pores passing completely through it. Electrodes consisting of...
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5302274 |
Electrochemical gas sensor cells using three dimensional sensing electrodes
An electrochemical gas sensor cell is provided, the use of which permits quantitative measurement of volatile gas contaminants in an atmosphere being monitored. The cell comprises at least a first...
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5298146 |
Device for the simultaneous detection of dissimilar gas components
The device for the simultaneous detection of dissimilar gas components contains a number of electrochemical, three-electrode measuring cells with a common electrolyte, that are formed from a number...
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5298783 |
Combined semiconductor gas sensor
The present invention relates to a combined semiconductor gas sensor, this sensor is constituted by combining two portions, each of the portions is made of a different gas sensitive material, their...
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5288374 |
Method and apparatus for electrochemical analysis and an aqueous solution for use therein
A method of electrochemical analysis involves contacting fluid samples of first and second different types in a mixed sequence with an electrochemical sensor, and also contacting the sensor with a...
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5288387 |
Apparatus for maintaining the activity of an enzyme electrode
A concentration measuring apparatus includes an enzyme electrode which accelerates an oxidation reaction or a reduction reaction of a test substance in a liquid and outputs an electrical signal...
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5286362 |
Method and sensor electrode system for the electrochemical determination of an analyte or an oxidoreductase as well as the use of suitable compounds therefor
The subject matter of the invention is a method for the electrochemical determination of an analyte in the presence of an oxidoreductase and a reducible substance which transfers electrons which...
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5284566 |
Electrochemical gas sensor with wraparound reference electrode
An electrochemical sensor for detecting gas includes stacked reference, counter and sensing electrodes within a body and having a quantity of a liquid electrolyte in an electrolyte chamber therein....
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5281539 |
Immunoassay device for continuous monitoring
A device and process for detecting the presence of organic molecular analytes in a fluid comprising a first binding component having a predetermined first affinity for specifically reversibly...
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