Device and method for monitoring an electrochemical gas sensor
AssigneeSensor Electronics, Inc.
InventorPatrick G. Smith
Life of this patent
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Abstract
An electrochemical gas sensor testing device that includes a test signal generator that generates a multiplexed signal that includes a first test signal that includes alternating current (AC) and is free from a direct current (DC) component and a second signal that includes a DC bias voltage, an electrochemical cell that includes a counter electrode, a sensing electrode, and an electrolyte, the counter electrode and the sensing electrode being in electrical communication with the electrolyte and each other, the counter electrode being in electrical communication with the signal generator to receive the multiplexed signal generated by the signal generator, and a processor that receives an AC signal from the sensing electrode and that analyzes the AC signal.
Claims15
An electrochemical gas sensor testing device comprising:
- a signal generator that generates a multiplexed signal comprising a first test signal comprising alternating current (AC) and being free from a direct current (DC) component, and a second signal comprising a DC bias voltage;
- an electrochemical cell comprising
- a counter electrode,
- a sensing electrode, and
- an electrolyte,
- the counter electrode and the sensing electrode being in electrical communication with the electrolyte and each other,
- the counter electrode being in electrical communication with the signal generator to receive the multiplexed signal generated by the signal generator;
- and
- a processor that receives an AC signal from the sensing electrode and that analyzes the AC signal.
An electronic circuit comprising:
- an electrochemical cell;
- and
- a single signal generator that applies an AC test signal and a DC bias voltage to the electrochemical cell.
Dependencies are inferred from the claim text.