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4273636 Selective chemical sensitive field effect transistor transducers  
A chemical sensitive field effect transistor transducer is provided having a semipermeable membrane on the surface of a chemical selective system overlying an insulated gate field effect...
4273638 Electrochemical sensing probe  
A probe for monitoring the gas concentration, such as oxygen in an anesthesia respiratory therapy circuit, which includes a reusable connector and conductive coupling structure to a sealed housing...
4271474 Apparatus for detecting and measuring the hydrogen content in a liquid substance  
The invention relates to an apparatus for measuring the concentration of gaseous hydrogen dissolved in a liquid substance. The apparatus comprises an electrochemical cell constituted of a...
4269685 Disposable polarographic gas sensor system  
A partially disposable, partially reusable polarographic sensor includes a fixed membrane and gel electrolyte in the disposable portion, and includes all electrical/metallic parts in the reusable...
4268370 High temperature, CO2 interference free, electrochemical O2 sensor  
An electrochemical sensor for determining the O2 content of a fluid characterized in that the electrolyte employed therein is selected from a group consisting of amino alcohols having 2 to 12...
4267023 Chemically integrating dosimeter and gas analysis methods  
A chemically integrating dosimeter for measuring gases, composed of a dual membrane system and an internal electrolyte solution. The outer membrane is a gas permeation rate controlling membrane....
4265250 Electrode  
An electrode for measuring gas concentration in blood and having a disposable, skin-contact assembly installed in a reusable base; the disposable assembly includes an anode, cathode, electrolyte,...
4259963 Multi-purpose transducer for transcutaneous blood measurements  
A multi-purpose polarographic oxygen-concentration transducer of the transcutaneous-measurement type, a face of it being laid against the tissue of interest, is able to generate signals beyond...
4259165 Dissolved oxygen probe  
A probe submersible in a liquid to continuously analyze the concentration of a gas such as oxygen dissolved therein. The probe is constituted by a casing having an open mouth covered by a...
4256832 Carcinogen and mutagen screening method and apparatus  
A method of screening a material for potential carcinogenic or mutagenic activity. A mutant stain of eucaryotic or prokaryotic test organism is provided which is capable of reverting to a normal...
4252123 Device for the transcutaneous electrochemical determination of the partial oxygen pressure in blood  
A device for the transcutaneous electrochemical determination of the partial oxygen pressure in blood, comprising a measuring head which includes at least three measuring cells of the Clark-type,...
4252627 Electrical oxygen probe  
An electrical membrane probe for the measurement of dissolved oxygen concentration in fluids, particularly designed for monitoring or control of fermentation process and characterized as follows:...
4248712 Electrode device  
An electrode device having an electrolyte container separated from the test medium by a membrane member, a cathode within the electrolyte container having the shape of the end section of a...
4240438 Method for monitoring blood glucose levels and elements  
A method for monitoring blood glucose levels at frequent intervals, which includes a method for equalizing the temperature and oxygen level in the blood and sensing the rate of oxygen consumption...
4240889 Enzyme electrode provided with immobilized enzyme membrane  
An enzyme electrode comprising an anode, a cathode, an immobilized enzyme membrane, and an electrolyte, which is characterized in that said membrane consists of a dense skin layer having selective...
4233143 Measured value receiver for the polarographic measurement of gases in liquids  
The invention relates to a measured value receiver for the polarographic measurement of gases in liquids. The unit comprises a main mounting member having an end face with associated cathode and...
4230537 Discrete biochemical electrode system  
A biochemical device and method for the determination of dissolved gases in solution is provided which employs a dry electrode/sample interface. Dissolved oxygen or other gas concentration in a...
4227974 Electrochemical cell having a polarographic device with ion selective electrode as working electrode and method of use  
The sensitivity and, especially, the selectivity of a polarographic device can be increased by using an ion selective electrode as the working electrode in the electrochemical cell. The cell is a...
4224125 Enzyme electrode  
An enzyme electrode, which comprises an oxidoreductase including, where necessary, a coenzyme; a redox polymer acting as an electron mediator in an enzymatic reaction; and an electron collector,...
4219359 Sintered body of zirconia for oxygen concentration sensor  
A sintered body of zirconia material for an oxygen concentration sensor exhibiting an electromotive force in accordance with the difference in the concentration of oxygen between a gas tested and...
4218298 Selective chemical sensitive FET transducer  
A selective chemical sensitive field-effect transistor device for use in detection and measurement of chemical properties of substances to which the device is exposed is disclosed. The chemical...
4217194 Instrument for polarographic potentiometric, thermal and like measurements and a method of making the same  
A probe having a measuring device for polarographic, potentiometric, ther and like measurements has a high-resistance transducer which is provided with leads. A body of insulating material is...
4216065 Bio-selective electrode probes using tissue slices  
A bio-selective potentiometric electrode probe for the determination of amino acid concentrations in aqueous liquids comprising an ammonia gas analytical electrode provided at its tip with a...
4209300 Hemoglobin-oxygen equilibrium curve analyzer  
A system for obtaining a hemoglobin-oxygen equilibrium curve for a sample of concentrated hemoglobin solution or whole blood. Gaseous oxygen and/or nitrogen is used to oxygenate or deoxygenate the...
4207146 Process for testing gases in body fluids for partial pressure and to a testing device therefor  
A testing device for the partial pressure testing of gases in body fluids comprises a test electrode having a platinum wire extending through a glass tubule arranged in a synthetic tube having a...
4207160 Measuring sensor head for determining the contents of gases in liquids  
A measuring sensor head for determining the contents of gases in liquids, particularly for transcutaneous determination of oxygen in blood, as well as a method of manufacturing such sensor head...
4207161 Dissolved oxygen analyzer  
A dissolved oxygen analyzer which includes a sensor having a lead electrode and lead wire extending therefrom and a silver electrode and silver wire extending therefrom. The electrodes are...
4199412 Halide ion-selective devices and method  
Halide ion-sensitive devices and methods for their use are described. The devices contain a halide ion-permeable overlayer which is superposed on a layer of silver halide and meets certain...
4199411 Halide ion-selective devices and methods of determining halides  
Halide, especially chloride and bromide, ion-sensitive devices which are insensitive to uric acid, and other interfering materials while demonstrating extended shelf lives, are described. Such...
4197853 PO2 /PCO2 sensor  
This invention relates to an electrochemical sensor system for the simultaneous and continuous measurement of the partial pressure of oxygen PO2 and carbon dioxide partial pressure PCO2 in fluids....
4198280 Membrane support structure for electrochemical sensing probe  
A probe for monitoring gas concentration, such as oxygen, in an anesthesia respiratory therapy circuit which includes an improved membrane support structure. This structure includes an electrode...
4198281 Solvator plug  
The present invention relates to a solvator plug for replenishing aqueous or non-aqueous solvents in devices such as electrochemical sensor cells. The plug includes a housing adapted to...
4197852 Catheter electrode for electrochemical analysis  
The electrical sensor of the present invention for electrochemical analysis comprises a sheath and at one end thereof a semi-permeable membrane which is impermeable for macromolecular materials...
4187162 Electrochemical cell  
The present invention is directed to certain modifications to sensor cells to minimize electrolyte dilution or loss and to reduce electrical noise. These objectives are attained by designing and...
4182666 Oxygen sensors  
An oxygen sensor is described which includes an electrochemical cell having a gas diffusion electrode which includes a porous metal layer and another layer substantially non-porous to the...
4176032 Chlorine dioxide analyzer  
A system adapted to continuously and accurately measure the concentration of chlorine dioxide dissolved in liquid, the system including a sensor immersible in the liquid being tested. The sensor...
4175028 Electrode membrane  
An electrode membrane structure comprising: an annular support member and a circular membrane portion integrally molded into said annular support, said membrane support being formed of...
4172778 Ion-selective electrode  
Ion-selective electrode for determining the concentration of one specific ion in a solution of a mixture of different ions. The active material consists of Ag3 SBr or Ag3 SI. The electrode is used...
4172770 Flow-through electrochemical system analytical method  
An electrochemical system using a flow-through electrode design employing a dual separation method to lower electrode poisoning due to large chemical species and interference current due to small...
4170523 Method for checking isolation between titration and electrochemical measuring systems of a chemical analyzer  
A method of checking the electrical isolation provided by a gas permeable membrane for a carbon dioxide sensor in an analyzer for simultaneously measuring the carbon dioxide and chloride content...
4169779 Electrochemical cell for the detection of hydrogen sulfide  
An electrochemical cell for the detection of hydrogen sulfide which includes a gold working electrode and a counter electrode, with or without a reference electrode, comprising either gold or...
4168220 Method for detecting the fouling of a membrane covered electrochemical cell  
In a polarographic cell of the type which avoids depletion of the species being measured in the sample, the fouling of the membrane covering of the cell is detected by utilizing an electrode which...
4161437 Measuring probe for the polarographic determination of partial gas pressures  
The probe comprises a support of insulating or dielectric material, such as, for example, a glass tube drawn to a closed point at one end. An indicator electrode is supplied as a thin film of...
4157288 Polarographic measuring probe with diffusion film membrane  
Measuring probe for a polarographic determination of gas partial pressures in aqueous, and more particularly in biologic, medium, comprises at least a part made up of a plurality of thin films...
4152233 Apparatus for electrochemical gas detection and measurement  
Method for the electrochemical detection of a gas and apparatus including a gas-contacting electrode, biased to a predetermined potential, a counter electrode and electrolyte between the...
4151060 Solid state filter for gas sensors  
A mixed-conducting (electronic-ionic) membrane exhibiting substantially no mechanical porosity, is employed as a solid state filter in combination with a gas sensor to protect the gas sensor from...
4149949 Electrochemical analysis apparatus employing single ion measuring sensor  
Apparatus for measuring CO2 in serum with a single pH sensor of the electrolyte flow-through type, the sensor including a gas-permeable membrane selectively passing CO2 into an electrolyte filled...
4148305 Cathode for polarographic measurements in physiological medium  
A cathode for polarographic measurements in physiological medium, such as measuring oxygen partial pressure in a human or animal body, is comprised of an elongated cable having a conductive...
4143316 Hydrogen consentration meter utilizing a diffusion tube composed of 2 1/4 C r  
A diffusion tube hydrogen meter for improving the sensitivity and response time for the measurement of hydrogen in liquid sodium. The improved hydrogen meter has a composite membrane composed of...
4141800 Electrochemical gas detector and method of using same  
An electrochemical gas detector based on an electrolytic measurement cell having a normally solid organic electrolyte. The gas component to be detected diffuses out of the gas chamber at a three...