Method of operating a calorimetric gas sensor

Details Method of operating a calorimetric gas sensor Method of operating a calorimetric gas sensor

1996-12-20

2000-10-17

Williams, Hezron

Measuring and testing

Gas analysis

Gas of combustion

422 51, 204427, G01N 700, G01N 2726, G01N 2520

Patent

active

061314382

ABSTRACT:
A method of operating a calorimetric gas sensor by modulating its operating temperature includes the steps of heating a sensing element and a reference element of a calorimetric gas sensor to a first temperature between a predetermined minimum temperature and a light-off temperature of the sensing element, modulating the heating of the sensing element and reference element between a second temperature above the light-off temperature and the first temperature to produce an alternating current (AC) output, and measuring the AC sensor output of the frequency of modulation.

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