Method for CO detection and its apparatus
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United States of America Patent
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May 14, 1996
Grant Date -
N/A
app pub date -
Sep 20, 1994
filing date -
Sep 20, 1994
priority date (Note) -
Expired
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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.
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