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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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
5281324 Measuring sensor for detecting gaseous components  
The invention is directed to a measuring sensor for detecting gaseous components which operates in the diffusion limit current region. The measuring sensor includes a support body and has an...
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...
5273631 Method for continuously determining concentration of chloride ions and bromide ions contained in serum  
A method is disclosed for determining the concentration of chloride ions and bromide ions employing one and the same serum specimen and one measuring electrode assembly consisting of a working...
5273640 Electrochemical gas sensor  
An electrochemical gas sensor includes, as disposed on an insulating substrate, a plurality of electrodes for individually sensing a standard gas present in a surrounding atmosphere at a fixed...
5271815 Method for measuring glucose  
This invention provides an electrochemical sensor capable of measuring the glucose level of body fluids, especially blood. More particularly, this invention also relates to the use of such a...
5269903 Microbioelectrode and method of fabricating the same  
Fine particles 1 of an electrically conductive material such as platinum black are being deposited electrolytically on the end surface of an electrically conductive material (base) such as...
5266180 Interior electrode of a polarographic electrode  
In order to simplify manufacture of the interior electrode of a polarographic electrode with an electrically insulating shell containing a wire lead and carrying a reactive surface at its front...
5250168 Integrated ion sensor  
Disclosed is an integrated ion sensor, which comprises at least one ion selective membrane sensitive to ions contained in a solution to be measured for detecting the concentration of the ions, a...
5246561 Electrolytic cell and process for the labeling of proteins and peptides  
An electrolytic cell for the labeling of proteins, peptides and other organic molecules employs a cathodic half cell and an anodic half cell, where a porous working electrode is located in one...
5244561 Process and apparatus for the electrochemical determination of pCO2 in blood  
In a blood gas analyzer, a measurement liquid, advantageously high-purity water, is fed from a suitable vessel to a diffusion cell in which the measurement liquid is brought into contact via a...
5239257 Measuring probe for amperometric determination of gases and/or nonionic compounds contained in a measured medium  
A modular-construction measurement probe comprising a component designed as a diaphragm module and, connected to the diaphragm module, a rod electrode. The diaphragm is made up of at least three...
5238853 Process and apparatus for the electrochemical determination of oxygen in a blood gas analyzer  
In a blood gas analyzer, a substantially oxygen-free measurement solution is fed through a measuring cell as far as a diffusion cell in which the measurement solution is brought into contact with...
5234567 Gas sensor  
An electrochemical gas sensor for sensing an alkaline gas such as ammonia. The sensor comprises at least sensing and counter electrodes provided in a cell containing an aqueous electrolyte, the...
5228972 Apparatus for measuring concentration of test substance in liquid  
A disk-shaped thin plate or a long-sized thin plate having a roll appearance housed in a casing in which openings for penetration of test substance are formed and on which diffusion-limiting...
5228974 Electrochemical measuring cell for determining ammonia or hydrazine in a measuring sample  
The invention is directed to an electrochemical measuring cell for measuring ammonia or hydrazine and includes at least a measuring electrode and a counter electrode in an electrolyte. The...
5227037 Method and apparatus for measuring quantity of admixture in ready-mixed concrete  
A method of measuring the quantity of an admixture in ready-mixed concrete comprises the steps of collecting volatile components generated from the admixture, measuring the concentration of the...
5225063 Apparatus for the electrochemical determination of the partial oxygen pressure in a liquid measuring medium  
An apparatus for electrochemically determining the partial oxygen pressure pO2 in a liquid measuring medium includes a measuring sensor having a working electrode and a counter-electrode. The...
5223117 Two-terminal voltammetric microsensors  
Self-assembly of a chemically insensitive redox material, such as ferrocenyl thiol, and a chemically sensitive redox material, such as a quinone thiol, onto microelectrodes forms the basis for a...
5223123 Method for making a polarographic oxygen sensor  
The cathode sub-assembly of a polarographic sensor comprises an elongate housing with a longitudinal opening therethrough and with noble metal wires extending completely through the opening, the...
5215644 Dissolved oxygen electrode with verification system  
An improved oxygen sensing electrode assembly is provided with first and second electrodes mounted within a cavity of a housing substrate. An oxygen permeable diaphragm closes the cavity and...
5204262 Ethanol sensor for computerized fermentation control  
A probe for continuously measuring the precise concentration of liquid ethanol in a fermentation broth over the range of feasible fermentation temperatures. The probe includes a thermal sensor, a...
5200051 Wholly microfabricated biosensors and process for the manufacture and use thereof  
An efficient method for the microfabrication of electronic devices which have been adapted for the analyses of biologically significant analyte species is described. The techniques of the present...
5190623 Nuclear fuel reprocessing plant  
In a nuclear fuel reprocessing plant for processing a used nuclear fuel by a nitric acid solution, the present invention provides a nuclear fuel reprocessing plant characterized by including...