Combustible gas measurement

Details Combustible gas measurement Combustible gas measurement

1995-03-20

1998-01-13

Teska, Kevin J.

Boots, shoes, and leggings

364431062, 364483, 7320414, 422 51, 422 95, 422 98, 436147, G01F 168, G01N 2522, G01N 2530

Patent

active

057085854

ABSTRACT:
A pulsed measurement technique for calorimetric sensors provides a short current pulse through catalyzed and inert sensor elements to minimize self heating while providing for sensor resistance measurement, so that a determination of the level of catalytic activity at the surface of the catalyzed element may be made for sensing the concentration of combustible elements of automotive internal combustion engine exhaust gas. Exhaust gas temperature measurement is provided by monitoring the inert element resistance. Exhaust gas flow rate measurement is provided by heating the inert element for a short heating period, and then removing the heat source while monitoring the time rate of return to the known initial inert element temperature.

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