Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-10-24
1996-06-18
Swarthout, Brent A.
Communications: electrical
Condition responsive indicating system
Specific condition
340634, 422 90, 422 94, 422 98, G08B 1710
Patent
active
055282253
ABSTRACT:
A gas detecting method and apparatus for selectively detecting a fuel gas having methane as a main component thereof and an incomplete combustion gas having carbon monoxide as a main component thereof. A low heat capacity, hot-wire semiconductor type gas sensor used has an oxide semiconductor formed mainly of valency-controlled tin oxide and acting as a sensitive section thereof. An inactive to gas combustion, heat resistant, quadrivalent metallic oxide is mixed into the sensitive section. The sensitive section is alternately switched between a fuel gas detecting temperature and an incomplete combustion gas detecting temperature.
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Nakatani Mikiya
Sakai Sai
Lieu Julie B.
New Cosmos Electric Co. Ltd.
Swarthout Brent A.
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