Method for CO detection and its apparatus

Details Method for CO detection and its apparatus Method for CO detection and its apparatus

1994-09-20

1996-05-14

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

340632, 422 94, 422 98, 338 34, 73 3105, 73 3106, G08B 1710

Patent

active

055171826

ABSTRACT:
A CO detector, utilizing periodical temperature change of a metal oxide semi-conductor gas sensor, is equipped with a backup battery. When power cut of a commercial power supply is detected, the detector will be driven by the battery, and the gas sensor will be heated at 50.degree.-100.degree. C. for from 30 seconds to 1 minute and will be kept at room temperature for about 30 minutes. CO is detected by the minimum sensor output after the heating.

REFERENCES:
patent: 3750123 (1973-07-01), Caillouet, Jr.
patent: 3906473 (1975-09-01), Le Vine
patent: 4443791 (1984-04-01), Risgin
patent: 4535315 (1985-08-01), Sakai
patent: 4567475 (1986-01-01), Bukowiecki et al.
patent: 4860223 (1989-08-01), Grilk
patent: 4896143 (1990-01-01), Dolnick et al.

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