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5660163 Glucose sensor assembly  
A glucose monitoring system continuously measures the glucose concentration in a patient's blood, provides an indication of the rate of change of such concentration, and determines whether the...
5658444 Electrochemical sensors  
Erythrocyte exclusion membranes suited for test strips of electrochemical sensors have a porous matrix and a mobile erythrocyte aggregating agent. The membranes typically comprise a...
5656142 Biosensor for measuring gas and the manufacturing method thereof  
A biosensor for measuring gas-phase organic chemicals rapidly and accurately. The biosensor includes a thick film electrochemical device having an insulating substrate, electrodes formed on the...
5650062 Biosensor, and a method and a device for quantifying a substrate in a sample liquid using the same  
The biosensor of this invention can quantify a substrate in a sample liquid by electrochemically measuring the amount of an electron acceptor that has been reduced by electrons generated in a...
5635627 Carbon monoxide sensor having mercury doped electrodes  
In this carbon monoxide sensor, particularly for measuring carbon monoxide in flue gases, which must be operated in a controlled-potential bias circuit and which comprises a working electrode, a...
5632882 Electrolytes for inhibiting silver deposition on oxygen sensor cathodes and methods of use of same  
A Clark-type gas detection apparatus includes a sensor electrode and a reference electrode exposed to an aqueous electrolyte solution which is isolated from a liquid medium surrounding the...
5632875 Electrochemical gas sensor assembly  
An electrochemical gas sensor assembly comprises an electrochemical gas sensor; an electrolyte reservoir (3); and at least one capillary (9) defined by substantially rigid, non-porous walls for...
5628890 Electrochemical sensor  
An electrode strip for use in an electrochemical sensor for measuring a compound in a sample is provided, including an electrode support, a reference or counter electrode disposed on the support,...
5624537 Biosensor and interface membrane  
A regenerable biosensor probe adapted for positioning in a bioreactor comprises a selectively permeable interface membrane, a porous protein-receiving matrix adjacent to the interface membrane, an...
5624538 Measuring device for determining the concentration of alcohols  
A measuring device for determining the concentration of low-molecular alcohols in water or acid having the following construction: a porous anode for the electrochemical oxidation of alcohol a...
5624546 Method and apparatus for the detection of toxic gases  
A compact electrochemical cell utilized for the detection of numerous toxic gases. The cell includes working and counter electrodes, surrounded by a liquid electrolyte, all of which is enclosed...
5614416 Methods and apparatus for rapid equilibration of dissolved gas composition  
Disclosed is an apparatus and method of equilibrating the dissolved gas composition of an aqueous fluid to reflect the predetermined gas composition contained in a gas equilibration reservoir. The...
5611908 Method of operating and amperometric measuring cell  
The invention relates to a method for operating an amperometric measuring cell which includes at least a measuring electrode 2 and a counter electrode 3 in an electrolyte chamber 4 filled with an...
5611900 Microbiosensor used in-situ  
The present invention is a novel, ultra-small tip, internal referenced, amperometric microbiosensor that uses an immobilized biological interface to measure the concentration of an analyte in a...
5611904 Electrochromatography apparatus  
The invention provides fittings for the ends of electrochromatography cols. Each fitting includes an annular electrode surrounding one end of the passage electrical fields to be applied. The...
5611909 Method for detecting source of error in an amperometric measuring cell  
The invention is directed to a method for detecting error sources in an amperometric measuring cell 1 which includes at least a measuring electrode 2 and a counter electrode 3 within an...
5611902 Cathode in a layered circuit and electrochemical cell for measurement of oxygen in fluids  
The electrode of the present invention has metallic surface within a laser produced opening where the metallic surface extends into an electronic metallic conductive pathway and the pathway is...
5607567 Protamine-responsive polymeric membrane electrode  
A polymeric membrane electrode gives potentiometric responses to macromolles, such as protamine, in solution or biological specimens. A protamine-responsive membrane includes a lipophilic...
5607573 Method for detecting fugitive emissions  
A novel, inexpensive sensor (10) for detecting volatile hydrocarbons and other solvent vapors detects leaks in the fittings and valves of petroleum refineries and chemical manufacturing and...
5607565 Apparatus for measuring analytes in a fluid sample  
A method and apparatus provide a system for measuring a measurable component in a sample. A sample is introduced into a chamber. A permeable membrane to the measurable component allows the...
5603820 Nitric oxide sensor  
An electrode sensor which may be used to specifically and quantitatively measure nitric oxide is provided, as well as a method of preparing and using such an electrode sensor to measure nitric...
5595676 Fluorinated polymers  
A fluoroorganic polymeric material which comprises a polymeric chain and at least one group pendent from the polymeric chain, in which the group pendent from the polymeric chain comprises at least...
5584979 Ion-selective electrode and procedure for producing an ion-selective electrode  
The invention relates to an ion-selective electrode and to a procedure for producing the electrode. The electrode is a single-piece all-solid-state electrode comprising a conducting or...
5582696 Glucose level monitoring apparatus  
A seal and wiper assembly covers the opening of a reservoir of buffer solution in a blood glucose level. A monitor. A replaceable test cap is designed for single use. As the test cap is installed,...
5582698 Sensor package  
A solid state, multi-use electrochemical sensor having an electrically nonconductive substrate, a working electrode, and a semi-permeable membrane covering the working electrode. The working...
5580441 Method of measuring ion concentration and apparatus therefor  
An ion concentration measuring apparatus for measuring the concentration of a measuring ion in a sample solution containing the measuring ion and an interfering ion having the same ionic charge...
5580433 Selective electrochemical detector for nitric oxide and method  
A thin film solid state amperometric detector for nitric oxide is provided based upon a mobile cation electrolyte that selectively transmits nitrosonium cations (NO*) therethrough. The presently...
5578194 Calibration of electrodes  
A CO2 electrode can be calibrated with two PCO2 calibration standard solutions having known pH values and known bicarbonate ion source concentrations. An O2 electrode can be calibrated using air...
5575930 Method of making gas permeable membranes for amperometric gas electrodes  
A method of manufacturing a gas-permeable membrane for an amperometric gas electrode comprising demetallizing areas of a metallized film to obtain a regular array of gas-permeable micropores.
5573649 Miniaturized oxygen electrode and process of producing same  
The miniaturized oxygen electrode having a small size exceeding the limit of miniaturization of the prior art electrode comprises an insulating substrate 21, 31 and, provided thereon, a pair of...
5571395 Breath alcohol analyzer using a biosensor  
A biosensor for measuring alcohol concentration includes an insulating substrate and an amperometric device formed on the insulation substrate, having a plurality of conductive lines and...
5567290 Sensor devices  
Sensor devices for examining fluid samples having, between the sample under examination and a detector, a membrane made of polyvinyl chloride in un-plasticized form. This membrane material acts as...
5567301 Antibody covalently bound film immunobiosensor  
A biosensor comprising a substrate material, at least one antibody covalently immobilized on the substrate material, and a pair of metal contact electrodes for measuring the impedance of the...
5562815 Apparatus and method for the electrochemical determination of the oxygen concentration of a liquid medium  
An apparatus and method of electrochemically determining an oxygen concentration with an oxygen sensor that includes a working electrode. The working electrode has a potential profile that...
5560810 Electrochemical gas sensor assembly  
An electrochemical gas sensor assembly comprises an electrochemical gas sensor for sensing a selected gas. A filter is provided through which gas to be sensed must pass before reaching the sensor,...
5556524 Electron-conducting molecular preparations  
The invention relates to an electron-conducting molecular preparation designed to act as a conductor by receiving an electron at its one end and conducting the electron along its molecular...
5554272 Planar bicarbonate sensor  
A planar bicarbonate sensor has been discovered that has a dried residue internal electrolyte layer comprising a bicarbonate source and a halide salt of potassium, lithium, or sodium. The...
5547554 Electrochemical measuring cell having a gas-permeable housing  
The invention is directed to an electrochemical measuring cell for detecting gaseous constituents in air. The measuring cell includes a measuring electrode and a counter electrode accommodated in...
5547561 Sensor devices and method of using same  
Sensor devices for detecting components in fluid samples, especially by electrolytic analytical methods, comprising a detecting means (usually an anode, especially one of platinum) surrounded by a...
5547555 Electrochemical sensor cartridge  
An electrochemical sensor cartridge with at least three reservoir cells, the floor of each cell in leakproof contact with the surface of an electrode assembly whose conductivity is affected by the...
5547553 Mercury thread electrode  
An improved mercury electrode for electrochemical analysis is formed by a small diameter thread of liquid mercury contained within an inert tube which, at one point along its length, has an short,...
5540828 Method for making electrochemical sensors and biosensors having a polymer modified surface  
A method for making a sensing element for use in a sensor or biosensor that amperometrically measures the concentration of an analyte in a liquid, includes the following sequential steps: a)...
5538620 Electrochemical sensor with which to measure gas concentrations  
The invention concerns a novel electrochemical sensor with which to measure gas concentrations and comprising a measuring electrode and an associated electrode containing a carbonaceous material...
5531870 Potentiometric ion determinations using enhanced selectivity asymmetric ion-selective membranes  
This invention relates to a process for performing enhanced selectivity potentiometric ion determinations using an asymmetric ion membrane electrode having an asymmetric membrane with a...
5527446 Gas sensor  
A gas sensor including an electrochemical sensor cell which has a anion-eange solid polymer electrolyte membrane with three attached electrodes is provided. The sensor cell contains no liquid...
5527444 Probe having coaxial design for use with dissolved oxygen meter  
A probe is disclosed for use with a dissolved gas meter, which is capable of measuring the concentration of dissolved gas in a fluid by measuring the permeation of gas through a membrane into an...
5522980 Gas sensor and sensing device  
A gas sensor comprises a substrate on which are mounted three cells. Each cell includes an interdigitated capacitor defined by a pair of comb structure, electrically conductive tracks with the...
5520788 Support layer for enzyme electrode laminated membranes  
Improved Newman type enzyme containing laminated membranes are disclosed for use in conjunction with polarographic cells to measure analyte concentration in solutions. The laminated membranes...
5520787 Diagnostic flow cell device  
The present invention provides a diagnostic flow cell for determining the presence or amount of an analyte which may be contained in a test sample. The flow cell comprises a spacing layer having a...
5518602 Amperometric sensor  
An amperometric sensor detects acidic and alkaline gases utilizing a first pH-dependent reversible redox system on a measuring electrode 4. A reduction current occurs between the measuring...