Title: Apparatus for electrochemical gas detection and measurement

Abstract: Method for the electrochemical detection of a gas and apparatus including a gas-contacting electrode, biased to a predetermined potential, a counter electrode and electrolyte between the electrodes. The electrochemical reaction between the sensed gas and the sensing electrode produces an electric current in a sensing circuit between the sensing electrode and the counter electrode. The sensitivity and stability of the device are maintained by including a conductive member in spaced relationship to the sensing electrode. In accordance with the method, the conductive member is biased to the same potential as the sensing electrode and is selected to have the same response to factors affecting the zero current as the sensing electrode. The conductive member is electrically connected to the sensing electrode so that their zero current outputs are continuously balanced.

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Inventors: Chand, Ramesh (Chatsworth, CA, US)

Application Number: 797350
Filing Date: 1977-05-16
Publication_date: 1979-05-01
Assignee: Ambac Industries, Inc. (New York, NY)
Primary Class(es): 204/412 204/408, 204/415
Other Classes:
US Patent Ref:

2651612	Sep, 1953	Haller	204/195.
2913386	Nov, 1959	Clark	204/195.
3247452	Apr, 1966	Kordesch	204/1.
3328277	Jun, 1967	Solomons et al.	204/195.
3455807	Jul, 1969	Jacobson et al.	204/195.
3503861	Mar, 1970	Volpe	204/195.
3510420	May, 1970	Mills	204/195.
3526577	Sep, 1970	Molloy	204/195.
3629089	Dec, 1971	Luck	204/195.
3696019	Oct, 1972	Arrington et al.	204/195.
3707455	Dec, 1972	Derr et al.	204/195.
3763025	Oct, 1973	Chand	204/195.
3776832	Dec, 1973	Oswin et al.	204/195.
3855096	Dec, 1974	Bergman	204/195.
3894917	Jul, 1975	Riseman et al.	204/195.

Other Refs:
Primary Examiner: Tung, T.
Assistant Examiner:
Attorney: Fulwider, Patton, Rieber, Lee & Utecht