Gas sensor
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United States of America Patent
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Feb 5, 2002
Grant Date -
N/A
app pub date -
Apr 12, 1999
filing date -
Jan 25, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A gas sensor for the detection of gases comprises a housing and an active element disposed within the housing. The active element is surrounded by a porous insulating material having a bulk density no greater than 0.15 g/cc. Another gas sensor comprises an active element surrounded by a porous insulating material having a surface area no greater than approximately 200 m.sup.2 /cc. Another gas sensor comprises a copper compound positioned so that gas contacts the copper compound before contacting the active element. Another gas sensor comprises an active element surrounded by a porous material having an average pore size of at least approximately 100 .ANG.. Another gas sensor comprises a heating element surrounded by a porous material that supports a catalyst.
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