Method and device for detecting reducing gas using semiconductor

Details Method and device for detecting reducing gas using semiconductor Method and device for detecting reducing gas using semiconductor

1992-05-01

1993-06-29

Harvey, Jack B.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Semiconductors for nonelectrical property

73 1G, 73 232, 204409, 422 98, 422110, 436127, G01N 2700

Patent

active

052237834

ABSTRACT:
A method and a device which uses a semiconductor type of sensor for detecting and measuring gas of the type such as hydrogen sulfide which depletes the oxygen component from the semiconductor sensor when exposed to the gas and thus lowers electrical resistance through the sensor which uses a pair of semiconductor gas detecting sensors. In one embodiment, the gas sensors are alternatively fed with gas to be sampled and air. In another embodiment, the gas sensors are alternatively turned on and off at predetermined intervals to replenish the depleted oxygen when the sensor is turned off and to sample when the sensor is turned on.

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