Patent ID: 8721970

Claim:
A detector comprising: a plurality of catalytic sensors; a plurality of correction factors where each correction factor of the plurality of correction factors is a mean of the respective correction factors of the plurality of catalytic sensors determined at a selected value of one of temperature and humidity and where the plurality of correction factors are determined across an operating range of the plurality of catalytic sensors at respective selected values of the one of temperature and humidity; at least a first catalytic sensor from the plurality of catalytic sensors; the at least first catalytic sensor of the plurality of catalytic sensors implemented with only a single pellistor to sense a first explosive, ambient, gas; a non-catalytic sensor of at least one of ambient temperature and ambient humidity; and control circuits coupled to the single pellistor with the control circuits including pre-stored values of the plurality of correction factors, the control circuits retrieving at least one of the pre-stored correction factors using a measured value of at least one of temperature and humidity from the non-catalytic sensor with the at least one retrieved pre-stored correction factor combinable with gas indicating indicia from the single pellistor to produce corrected gas indicating indicia, absent data from a compensating pellistor.