Electrochemical sensor
First Claim
1. AN ELECTROCHEMICAL SENSOR FOR DETERMINING THE OXYGEN PARTIAL PRESSURE, IN WHICH TWO ELECTRODES ARE DISPOSED IN A CHAMBER WHICH CONTAINS AN ELECTROLYTE AND THE WALLS OF WHICH ARE PERMEABLE TO OXYGEN, COMPRISING THE CHAMBER BEING DEFINED BY THE INTERIOR OF A TUBE OF A FLEXIBLE MATERIAL PERMEABLE TO OXYGEN, AND WHICH CHAMBER IS PARTIALLY FILLED WITH A SEALING COMPOUND AND CLOSED AT THE END THEREOF WHICH CONTAINS THE ELECTROLYTE, THE ELECTRODES INCLUDING A PAIR OF WIRES PARALLEL TO THE LONGITUDINALL AXIS OF THE TUBE WHICH ARE PARTIALLY EMBEDDED IN THE SEALING COMPOUND, THEIR ENDS PROJECTING TWO DIFFERENT DISTANCES INTO THE INTERIOR OF THE TUBE AND A LONGITUDINAL PORTION OF EACH END BEING IN CONTACT WITH THE ELECTROLYTE, THE LONGER ONE OF SAID WIRES HAVING AN INSULATING LAYER IN THE REGION OVER WHICH THE SHORTER WIRE EXTENDS, THE ACTIVE SURFACES OF THE ELECTRODES BEING FORMED BY THE NONINSULATED SURFACES OF THE WIRE ENDS WHICH FACE THE INNER SURFACE OF THE BODY.
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Accused Products
Abstract
An electrochemical sensor is disclosed for determining the oxygen partial pressure, particularly in biological media in vivo. The arrangement includes a tubular flexible plastic member closed at one end which is permeable to oxygen and houses a pair of electrodes in a chamber portion thereof which contains an electrolyte. A portion of the chamber is filled with a sealing compound which partially embeds the electrodes, and the electrodes are arranged such that they project into the chamber at two different distances to be in contact with the electrolyte. The longer wire is provided with an insulating layer in the region over which the shorter wire extends.
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Citations
2 Claims
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1. AN ELECTROCHEMICAL SENSOR FOR DETERMINING THE OXYGEN PARTIAL PRESSURE, IN WHICH TWO ELECTRODES ARE DISPOSED IN A CHAMBER WHICH CONTAINS AN ELECTROLYTE AND THE WALLS OF WHICH ARE PERMEABLE TO OXYGEN, COMPRISING THE CHAMBER BEING DEFINED BY THE INTERIOR OF A TUBE OF A FLEXIBLE MATERIAL PERMEABLE TO OXYGEN, AND WHICH CHAMBER IS PARTIALLY FILLED WITH A SEALING COMPOUND AND CLOSED AT THE END THEREOF WHICH CONTAINS THE ELECTROLYTE, THE ELECTRODES INCLUDING A PAIR OF WIRES PARALLEL TO THE LONGITUDINALL AXIS OF THE TUBE WHICH ARE PARTIALLY EMBEDDED IN THE SEALING COMPOUND, THEIR ENDS PROJECTING TWO DIFFERENT DISTANCES INTO THE INTERIOR OF THE TUBE AND A LONGITUDINAL PORTION OF EACH END BEING IN CONTACT WITH THE ELECTROLYTE, THE LONGER ONE OF SAID WIRES HAVING AN INSULATING LAYER IN THE REGION OVER WHICH THE SHORTER WIRE EXTENDS, THE ACTIVE SURFACES OF THE ELECTRODES BEING FORMED BY THE NONINSULATED SURFACES OF THE WIRE ENDS WHICH FACE THE INNER SURFACE OF THE BODY.
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2. The sensor according to claim 1 wherein said tube is made of a plastics material.
Specification