Arrangement for stabilizing a gas-reference electrode
First Claim
1. An arrangement for stabilizing a gas-reference electrode in a device for measuring electrochemical activities in a hydrogen and oxygen containing electrolyte present in a space, comprising a reference electrode of a nobel metal;
- a lipophile membrane covering a surface portion of the reference electrode and being arranged in said space to contact said electrolyte;
a source of gas arranged in said space opposite said reference electrode to supply gas toward the same, said gas source including a source electrode of a nobel metal, which is in contact with said electrolyte to release the gas therefrom; and
another lipophile membrane covering at least a surface portion of said source electrode opposite said first mentioned lipophile membrane, said other lipophile membrane being permeable to the gas released from the electrolyte by the action of the source electrode and being in contact with the electrolyte.
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Accused Products
Abstract
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 electrode includes a lipophile membrane coating a part of the gas reference electrode which communicates with an electrolyte containing space. A source of gas, preferably in the form of another electrode which release gas at a constant rate from the electrolyte, is arranged in the space opposite the gas reference electrode.
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Citations
24 Claims
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1. An arrangement for stabilizing a gas-reference electrode in a device for measuring electrochemical activities in a hydrogen and oxygen containing electrolyte present in a space, comprising a reference electrode of a nobel metal;
- a lipophile membrane covering a surface portion of the reference electrode and being arranged in said space to contact said electrolyte;
a source of gas arranged in said space opposite said reference electrode to supply gas toward the same, said gas source including a source electrode of a nobel metal, which is in contact with said electrolyte to release the gas therefrom; and
another lipophile membrane covering at least a surface portion of said source electrode opposite said first mentioned lipophile membrane, said other lipophile membrane being permeable to the gas released from the electrolyte by the action of the source electrode and being in contact with the electrolyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- a lipophile membrane covering a surface portion of the reference electrode and being arranged in said space to contact said electrolyte;
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19. An electrolytic catheter or a hollow needle measuring device including a measuring electrode, a gas reference electrode, a further electrode and a gas source electrode, said electrodes being partially coated with a lipophile membrane, comprising an elongated housing in the form of a hollow cylinder, said electrodes being in the form of nobel metal wires arranged in axially parallel relation within said cylindrical housing.
- 20. An electrolytic catheter or a hollow needle measuring device comprising an elongated housing in the form of a hollow cylinder, a gas reference electrode, a further electrode, a gas source electrode and a counter electrode acting as a gas source electrode for the further electrode, said electrodes being in the form of of nobel metal wires, arranged axially parallel in said housing and being coated by a lipophile membrane, and further comprising at least one annular measuring electrode arranged on the upper surface of said cylindrical housing, said electrodes being connected via insulated cables passing through the housing to an electronic control circuit.
Specification