Electrochemical gas sensor

Details Electrochemical gas sensor Electrochemical gas sensor

1991-06-05

1993-12-28

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

2041531, 20415318, 20415319, 2041532, 204400, 204412, 204415, 204421, 204424, G01N 27407

Patent

active

052736407

ABSTRACT:
An electrochemical gas sensor includes, as disposed on an insulating substrate, a plurality of electrodes for individually sensing a standard gas present in a surrounding atmosphere at a fixed concentration and a target gas present in the surrounding atmosphere, and a signal processing circuit for determining sensor life on the basis of sensed outputs of the standard gas. Constant detection of the sensitivity characteristics of the gas sensor is thereby attained for self-examination of the life thereof.

REFERENCES:
patent: Re31916 (1985-06-01), Oswin et al.
patent: 3894917 (1975-07-01), Riseman et al.
patent: 4384925 (1983-05-01), Stetter et al.
patent: 4394222 (1983-07-01), Rohr
patent: 4655880 (1987-04-01), Liu
patent: 4900405 (1990-02-01), Otagawa et al.
patent: 4963245 (1990-10-01), Weetall

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