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4780192 Polarographic measuring electrode device  
An electrochemical measuring electrode device (10) for polarographically measuring the partial pressure of oxygen in an electrolytic medium comprises a cathode (14) which is capable of reducing...
4776944 Chemical selective sensors utilizing admittance modulated membranes  
A chemical selective sensor system utilizes admittance modulated to detect the presence of chemicals or chemical species in a fluid. The sensor system includes a film or membrane adapted to pass...
4776942 Electrochemical sensor  
An improved sensor for dissolved oxygen measurement comprising a body having an electrolyte reservoir and electrolyte contained therein and an opening for communication between the exterior of the...
4775456 Electrochemical gas sensor  
An electrochemical gas analyzer is disclosed which includes sensing, compensation and counter electrodes in an electrolyte. The compensation electrode provides a compensation signal related to the...
4772375 Antifouling electrochemical gas sensor  
An antifouling electrochemical gas sensor is disclosed in which the sensor has a cell containing two spaced apart electrodes immersed in an electrolyte and a membrane over an opening in the end of...
4772377 Membrane anchor for ion-selective electrodes  
A membrane anchor for an ion-selective electrode may be formed by intersolubilizing an ion-selective membrane lying above a sensing pad with a region of thermoplastic material laterally disposed...
4767504 Method for conditioning a gas sensor  
A method is disclosed for conditioning a gas sensor. The electrode arrangement of the sensor is surrounded by an electrolyte and is partitioned off from the atmosphere by a gas-permeable membrane....
4763658 Dialysis system 2nd method  
An apparatus and a method of use for removing specified dialyzable components from a complex reference fluid such as, for example, blood. The invention includes a semi-permeable tubular dialysis...
4759828 Glucose electrode and method of determining glucose  
An electrode assembly for polarographic assay of glucose in solution having a laminated membrane, the outer membrane being from 1 to 20 μm thick and having a pore size of 10 to 125 Å, the inner...
4756804 Method of detecting hydrogen cyanide gas in a gaseous or liquid sample  
A method of detecting hydrogen cyanide using an electrochemical cell is disclosed. The cell comprises an electrolyte which is initially free of any salt capable of dissociating to form cyanide...
4750496 Method and apparatus for measuring blood glucose concentration  
A non-invasive method for measuring blood glucose concentration using glucose present at the mucosal surface of a living being is provided. The method includes the steps of positioning a glucose...
4738765 Electrolytic cell hygrometer  
An electrolytic hygrometer is provided which comprises a hollow cylinder having first and second shoulders and a ceramic substrate containing an electrolytic cell circuit pattern mounted on the...
4735691 Method for operating electrochemical detector cell  
The method of operating a two electrode electrochemical detector cell in which the cell is connected to an external current measurement circuit through a cyclically operated switch which...
4734184 Self-activating hydratable solid-state electrode apparatus  
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...
4732662 Measuring electrode  
A measuring electrode is disclosed for pH measurement, in particular for the transcutaneous determination of CO2 partial pressure. The measuring electrode is configured so that the shape thereof...
4729824 Gas sensor and method of using same  
An electrochemical sensor capable of determining the partial pressure of various gases (e.g., CO, CO2, H2 S, alcohol vapors, hydrocarbons, NOx, etc.) and, optionally, substantially concurrently,...
4721677 Implantable gas-containing biosensor and method for measuring an analyte such as glucose  
The present invention relates to a novel implantable biosensor and method for sensing products, such as hydrogen peroxide, generated from an enzymatic reaction between an analyte, like glucose,...
4714673 Method for measurement of concentration of substance  
A method for measurement of the concentration of a substance diffusable through inert membranes has a measuring electrode of metal, an electrolyte chamber containing electrolyte, a lipophilous...
4711245 Sensor for components of a liquid mixture  
This invention relates to equipment and methods for detecting the presence of, measuring the amount of, and/or monitoring the level of, one or more selected components in a liquid mixture,...
4711703 Thermal protection method for electroanalytical cell  
A method of thermal protection of a membrane-enclosed amperometric cell of the type comprising an electrolyte within an electrolyte space containing electrodes and enclosed by a semi-permeable...
4705617 Apparatus for deplating cutaneous gas sensors  
An improved method and apparatus for deplating the electrodes of cutaneous oxygen sensors. A controllable voltage source selectably establishes either a polarizing voltage or a deplating voltage...
4703756 Complete glucose monitoring system with an implantable, telemetered sensor module  
An electrochemical system includes a sensor module suitable for implantation in the body to monitor glucose and oxygen levels therein. The module has two oxygen sensors situated in an...
4701252 Dissolved gas and ion measuring electrode system  
An automatically depolarizing electrode system for analyzing ions and gases in a solution, especially in blood. A magnetic stirrer is placed in a test chamber of the electrode system and rubs the...
4689135 Device for conditioning a gas sensor  
A method is disclosed for conditioning a gas sensor. The electrode arrangement of the sensor is surrounded by an electrolyte and is partitioned off from the atmosphere by a gas-permeable membrane....
4685465 Electrode device for transcutaneously measuring a blood gas parameter and for sensing a bioelectrical signal and an electrode assembly comprising such an electrode device  
An electrode device for transcutaneously measuring the blood gas parameter and for sensing a bioelectrical signal and an electrode assembly comprising such an electrode device are disclosed. The...
4681115 Electrochemical measuring cell having an ancillary electrode  
An electrochemical measuring cell is disclosed having a device for sensing an external electical potential. The device is arranged in the region of the outer surface of the diffusion membrane of...
4681673 Portable oxygen sensor with shortened break-in time  
An improved oxygen sensor is provided which gives oxygen concentration readings immediately and without the uncertain delays of a break-in period. The break-in period is decreased substantially by...
4679562 Glucose sensor  
A glucose sensor for electrically determining blood glucose concentration for in vivo and in vitro applications and comprising an iridium substrate with an oxidized surface, to which is bonded a...
4672970 Electrode for living body  
Disclosed is a metal electrode for a living body, which comprises a noble metal wire an an insulating covering layer formed around the periphery of the noble metal wire. At least a part of the...
4672971 Oxygen sensor  
An oxygen sensor and method of monitoring the oxygen content of blood or other body fluids are provided, which oxygen sensor and method achieve monitoring of enhanced accuracy that is not...
4671288 Electrochemical cell sensor for continuous short-term use in tissues and blood  
An electrochemical cell sensor for monitoring oxidizable enzyme substrates in biological fluids situated in a housing and suitable for implantation in the body, including at least one oxygen or...
4664119 Transcutaneous galvanic electrode oxygen sensor  
A galvanic electrode oxygen sensor which is useful in measuring transcutaneous oxygen pressure (pO2) contains a cathode in the form of a porous film of a metal below hydrogen in the Electromotive...
4662996 Method and electrochemical sensor for sensing chemical agents using a sensing elctrode coated with electrically conductive polymers  
An electrochemical method and apparatus for detecting polar toxic species is disclosed which uses a conductive polymer coated sensing electrode. The conductive polymers may be polyquinoline or...
4661235 Chemo-receptive lipid based membrane transducers  
A lipid membrane is used as a chemo-receptive transducer for quantitative and semi-quantitative analysis of chemical test species in an electrolyte. The lipid membrane is contacted with an...
4659434 Gas sensor  
Gas detection electrochemical cell featuring, in one aspect, a liquid electrolyte free of any salt capable of dissociating to form in said electrolyte a weak acid or weak base (other than H3 O+ or...
4655900 Method for treating electrodes and improved electrochemical cell  
An improved electrochemical cell is described which comprises at least one electrode having increased signal strength achieved by treating at least the working surface of the electrode with a...
4650547 Method and membrane applicable to implantable sensor  
This invention relates to a novel membrane useful in an electro-chemical, optical or other sensor device and to a method employing the membrane for determining the concentration of large molecule...
4647363 Electrochemical measuring cell  
An electrochemical measuring cell is disclosed wherein the diffusion membrane which separates the electrolyte from the ambient is made of an intrinsically-conductive and electrochemically active...
4633704 Gas sensor  
The housing 1 of a gas sensor carries a diffusion barrier 2 for restricting the access of gas to the sensing element 4 and a filter 3 mounted between the diffusion barrier 2 and the sensing...
4632746 Electrochemical cell with thin wire electrode  
An electrochemical cell has an electrolyte container 4 with a wall 5, apertured to let electrolyte soak a membrane 5b. A thin wire loop electrode 13 of (if necessary) precisely known length and...
4627906 Electrochemical sensor having improved stability  
An electrochemical sensor device providing long term signal stability through a structure and relation of components effective to provide substantially uniform current flux at all points across a...
4627907 Long life portable oxygen sensor with high stability  
An oxygen sensor having increased stability in its sensitivity is provided. The oxygen sensor includes a sensing electrode spaced from a cadmium counter electrode. An alkaline electrolyte extends...
4620918 Selective sensor construction  
A sterilizable electrode employs a selectively permeable membrane bonded at its edges to a face of a cover member. An opening or hole in the cover permits contact between the membrane and a...
4615340 Sensor assembly suitable for blood gas analysis and the like and the method of use  
A sensor assembly for electrochemical analysis of a substance comprises a housing and electrodes for sensing selective gases and ions within the housing. A sampler is associated with the housing...
4614577 Apparatus for urea analysis  
For determining the urea concentration in liquids in continuous operation, with a high sensitivity and reliable determination of the urea content over an extended period of time, an electrode...
4604182 Perfluorosulfonic acid polymer-coated indicator electrodes  
A method is described for the amperometric determination of the concentration in a biological sample of a constituent which is a substrate for an oxidase enzyme by (1) catalyzing the substrate...
4599157 Oxygen permeable membrane  
There is disclosed a composite membrane and an air electrode for use in hydrogen-oxygen fuel cells, metal-air cells and oxygen sensors. The composite membrane includes a porous membrane having...
4591414 Method of determining methane and electrochemical sensor therefor  
A method and instrument including an electrochemical cell for the detection and measurement of methane in a gas by the oxidation of methane electrochemically at a working electrode in a nonaqueous...
4581121 Free chlorine gas analyzer  
A free chlorine analyzer including a probe immersible in chlorinated water having oxygen dissolved therein, the analyzer being adapted to continuously and accurately measure the concentration of...
4579641 pH Measurement device  
A pH measurement device includes working and reference electrodes. The working electrode has a linear electrically conductive substrate, at least a distal end surface of which consists of...