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4936956 Microelectrochemical devices based on inorganic redox active material and method for sensing  
Novel microelectrochemical devices are provided which consist of closely spaced microelectrodes coated with metal ion based inorganic redox active material such as oxides or mixed oxides of any of...
4932410 Dual membrane mounting for transcutaneous oxygen and carbon dioxide sensor  
A transcutaneous sensor probe having dual sensing electrodes responsive to the effects of two different transcutaneous gases on an ion solution separated from the skin surface by a selectively...
4929330 Diffusion-limiting membrane holding means for sensor  
A diffusion-limiting membrane holding means for a sensor comprising: a slender resilient thin plate, of which one shorter side serves as an engagement side, and of which one longer side is...
4929313 Amperometric electrochemical ion sensors and method for determining ion concentration  
Electrochemical devices constructed according to the present invention can be used to convert an ion flux into an electric current for determination of ion concentration. The devices are operated...
4925544 Electrochemical sensor with solid phase electrolyte  
An electrochemical sensor comprising an electrolyte and an analyte separated by a selectively permeable membrane preferably characterized in that the electrolyte is an electrically conductive...
4921582 Dissolved oxygen measuring method  
A system for measuring dissolved oxygen in a fluid employs a galvanic electrode operated in a transient mode. In operation, the galvanic electrode is intermittently coupled and decoupled, under...
4919141 Implantable electrochemical sensor  
The implantable electrochemical sensor for amperometric measurements in body liquids comprises at least one measurement electrode formed as a platinum wire, a reference electrode tubularly...
4911819 Electrochemical measuring cell having a compensating membrane  
The invention is directed to a measuring cell for detecting a component of a measuring sample. The measuring cell includes a housing in which an electrolyte as well as a measuring electrode and a...
4911794 Measuring with zero volume 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...
4909908 Electrochemical cncentration detector method  
Electrochemical biosensor systems or apparatus, components thereof, and methods for quantitatively measuring or assaying concentrations of selective substrates or metabolites in aqueous media as a...
4908105 Flow-compensated electrochemical cell and method of analysis  
A method and an apparatus for measuring concentration of a dissolved substance are disclosed. In accordance with the method, measurements are made with two instruments having different...
4908115 Minute electrode for electrochemical analysis  
A minute electrode comprised of a bundle of carbon fibers covered with a nonconducting resin, and the ends of the carbon fibers recesses at one end of the resin, and has the micro-holes released...
4908117 Solid state reference electrode  
A solid state reference electrode comprising a metal/metal salt electrode, an immobilized electrolyte in contact with the metal salt, and a perfluorocarbon copolymer coating on the immobilized...
4906339 Amperometric method  
A method for determination of a first electroactive and normally gaseous species (EAGS) and a second EAGS in a fluid medium containing both EAGS; the medium is contacted with a first working...
4897162 Pulse voltammetry  
A glucose sensing apparatus and method includes an electrocatalytic sensor having a reference electrode and a sensing electrode. A periodic signal is comprised of a ramp voltage which is...
4894138 Electrochemical gaseous measurement cell  
An electrochemical gaseous measurement cell includes a housing with an anode and a cathode arranged in spaced locations in an acid electrolyte for galvanic measurement of gases which comprises an...
4890620 Two-dimensional diffusion glucose substrate sensing electrode  
Enzyme electrode assembly suitable for sensing physiologically important molecules such as glucose wherein the rate of accessibility of enzyme substrates to the enzyme is differentially regulated...
4891104 Enzymatic electrode and electrode module and method of use  
An improved enzymatic electrode and electrode module specifically adapted for use in a medical analyzer device is disclosed which permits rapid analysis of substances of interest contained within...
4886740 Enzyme-electrode sensor with organosilane treated membrane  
A membrane for an enzyme-electrode type sensor treated to increase the range of linearity of the sensor response.
4885077 Composite membrane, method for its preparation and electrolyte sensor including same  
A porous composite membrane comprises a base membrane of high mechanical strength and a coating of a hydrophilic polymer on the surface of the membrane and on the walls of the pores. The invention...
4882031 Gas sensor  
Disclosed herein is a gas sensor comprising a membrane for gas sensing which comprises a selective gas permeable membrane and a reaction layer attached thereto; and a counter electrode separated...
4874501 Membrane for an electrochemical 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...
4865717 Electrochemical micro sensor  
A micro-amperometric electrochemical sensor for detecting the presence of a pre-determined species in a fluid material is disclosed. The sensor includes a smooth substrate having a thin coating of...
4851088 Electrochemical detection of carbon dioxide  
An electrochemical system for the detection of carbon dioxide includes a single cell chamber exposed to the sample medium through a polymeric barrier membrane, a single set of electrodes and...
4842697 Method of determining ammonia in a gaseous or liquid sample  
A method of determining ammonia in a gaseous or liquid sample is disclosed. A sensor comprising a sensing electrode, a reference electrode, a semi-permeable membrane and an electrolyte is used....
4839020 Gas sensor  
A gas sensor includes a multi-layered solid-state pH electrode and a reference electrode coated with a gas-sensitive layer (solid-state or gel-state) sensitive to an ion of interest, the surface...
4836907 Electrochemical measuring electrode device for simultaneously measuring the partial pressures of two gasses  
An electrochemical electrode device for simultaneously measuring the partial pressures of two gasses in a medium of limited gas availability one of which is measured potentiometrically and another...
4834101 Catheter-type electrochemical sensors  
A dual lumen CO2 catheter is formed of medical grade dual lumen silicone rubber tubing which has been impregnated with tridodecyl amine. The silicone tubing is gas permeable, and an external...
4832797 Enzyme electrode and membrane  
A membrane particularly for use in a sensor of the enzyme-electrode type which comprises one or more layers of material and an enzyme-containing layer and in which one layer is formed from a...
4830011 Catheter tip polarographic lactic acid and lactate sensor for extended use in vivo  
A polarographic sensor capable of monitoring lactic acid and lactate levels which can be incorporated on catheters to permit the in vivo study of lactate metabolism. A catheter may be directed to...
4830713 Regeneration method and device  
A method of regenerating a membrane-enclosed amperometric or Clark cell having an operative current range for electroanalytical operation limited by a maximum current density of typically not more...
4824551 Cell for measuring gas levels  
A method for measuring the amount of an electroactive gas in a gaseous mixture using an electrochemical cell, the cell including a working electrode (anode), counter electrode (cathode), an...
4824529 Lipid membrane-based device  
A protected, lipid membrane-based device useful as a chemoreceptive transducer is provided. The device includes a porous, membrane-protective layer attached to an underlying, lipid membrane. Also...
4822336 Blood glucose level sensing  
A method of sensing blood glucose levels in the steps of passing glucose from a peritoneal fluid through a semi-permeable membrane and into a closed chamber, metabolizing the passed glucose in the...
4820399 Enzyme electrodes  
An enzyme electrode composed of a carrier, an enzyme immobilized on a parr of the surface of the carrier, a coating film consisting of a thin film coating the portion where the enzyme is...
4818361 Combined pH and dissolved carbon dioxide gas sensor  
A combination pH and CO2 sensor employs separate sensors. Each sensor has a wire with an electrochemically active layer, an electrolyte layer and a membrane between the electrolyte layer and the...
4817594 Wound dressings with electrically conductive layers  
An integral anti-bacterial wound dressing, which comprises, five layers which are, in order (except that layers and 3 and 4 may be in either order), (1) a first layer of a permeable material; (2)...
4816130 Blood electrolyte sensors including crosslinked polyetherurethane membranes  
Partition membranes which are permeable to blood electrolytes fabricated from crosslinked polyetherurethane compositions having from 20 to 50% hard segments. The membranes absorb from 50 to 120%...
4810352 Electrochemical sensors  
An electrochemical gas sensor for detecting the amount of a gas or vapor in an atmosphere is described having a sensing electrode and a barrier limiting the rate of access of the gas or vapor to...
4809698 Transcutaneous blood gas sensor  
A transcutaneous blood gas sensor has a sensor housing with a central projection, a ring-shaped collar to be attached to the skin and a membrane holder having a membrane stretcher hole. The...
4808292 Arrangement for stabilizing a gas-reference electrode  
In a catheter or hollow needle type electrolytic measuring device having a measuring electrode and a gas reference electrode, an arrangement for stabilizing the operation of the gas reference...
4803991 Three electrode hydroquinone subcutaneous equilibrating tonometer  
A closed tonometer for subcutaneous insertion is disclosed having a small closed equilibrating bath. Three noble metal electrodes, preferably platinum (Pt), communicate through electrical...
4797180 Method for the detection of noxious gases  
The present invention is for an electrochemical cell and method for quantitatively detecting noxious gas which comprises a first working electrode comprising a gas diffusion membrane having bonded...
4795542 Electrochemical concentration detector device  
Electrochemical biosensor systems or apparatus, components thereof, and methods for quantitatively measuring or assaying concentrations of selective substrates or metabolites in aqueous media as a...
4790925 Electrochemical gas sensor  
Electrochemical sensor cells having reduced zero current temperature sensitivity comprise a working electrode and a counter electrode in close proximity and in contact with an electrolyte. Both...
4789453 Electrodes for the combined measurement of oxygen and carbon dioxide  
A combined sensor for sensing partial O2 pressure and partial CO2 pressure and comprising measuring electrodes, a reference electrode, a diaphragm covering the electrodes and an electrolyte layer...
4789436 Method and apparatus for nondestructive in vivo measurement of photosynthesis  
A device for in situ, nondestructive measurement of photosynthesis in live plants and photosynthetic microorganisms is disclosed which comprises a Clark-type oxygen electrode having a...
4784145 Membrane retainer assembly for physiological sensing units  
Disclosed herein is a retainer assembly for applying a membrane to a physiological sensing unit for the transcutaneous determination of the magnitude of physiological quantities, particularly for...
4781798 Transparent multi-oxygen sensor array and method of using same  
A transparent electrochemical oxygen sensor for simultaneously determining oxygen concentration at different locations on a biological surface that is capable of being positioned over the region...
4780185 Method of determining H2 S  
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...