Potentiostat circuit for electrochemical cells
First Claim
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1. In an electrochemical cell having a housing;
- a sensing electrode, a counter electrode and a reference electrode such that all three electrodes are contained within the housing;
an electrolyte contained within the housing and contacting each electrode; and
a potentiostat circuit connected to the reference and counter electrodes;
the improvement comprising having a direct current path between the sensing electrode and the reference electrode during normal operation of the electrochemical cell.
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Accused Products
Abstract
A simple potentiostat circuit for use in biasing a three-electrode electrochemical cell is described wherein a direct electrical connection is made between the sensing electrode and the reference electrode during normal operation of the cell. Preferably the electrical connection is a resistor. By selecting the resistive value properly, the zero gas current of the cell is eliminated without negatively affecting the response of the cell.
232 Citations
8 Claims
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1. In an electrochemical cell having a housing;
- a sensing electrode, a counter electrode and a reference electrode such that all three electrodes are contained within the housing;
an electrolyte contained within the housing and contacting each electrode; and
a potentiostat circuit connected to the reference and counter electrodes;
the improvement comprising having a direct current path between the sensing electrode and the reference electrode during normal operation of the electrochemical cell. - View Dependent Claims (2, 3, 4)
- a sensing electrode, a counter electrode and a reference electrode such that all three electrodes are contained within the housing;
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5. An electrochemical cell comprising:
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a housing;
a sensing electrode;
a counter electrode;
a reference electrode;wherein all three electrodes are contained within the housing; an electrolyte contained within the housing and contacting each electrode; and a potentiostat circuit connected to the electrodes and further comprising a permanent current path between the sensing electrode and the reference electrode. - View Dependent Claims (6, 7, 8)
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Specification
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Current AssigneeMine Safety Appliances Company (MSA Safety, Inc.)
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Original AssigneeMine Safety Appliances Company (MSA Safety, Inc.)
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InventorsScheffler, Towner B., Schneider, Alan A.
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Primary Examiner(s)Bell, Bruce F.
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Application NumberUS08/235,379Time in Patent Office564 DaysField of Search204/406, 204/412, 204/431, 204/432, 204/424, 422/98US Class Current204/406CPC Class CodesG01N 27/4045 for gases other than oxygen
