Measuring and testing – Gas analysis – Detector detail
Patent
1997-06-11
1999-06-29
Williams, Hezron
Measuring and testing
Gas analysis
Detector detail
73 232, 7333502, 73 2501, 422 96, G01N 2536, G01N 2704, G08B 1710
Patent
active
059182601
ABSTRACT:
A combustible gas detector or sensors having a multi-level sensitivity circuitry. The gas detector has a bridge circuit for outputing voltages indicative of gas concentrations contacting the bridge circuit. There is a power supply node electrically coupled to one end of the bridge circuit. There is also a voltage control circuit, coupled between the bridge circuit and the power supply node, for controlling when at least a low and high input voltage level is supplied to the bridge circuit so that the bridge circuit has at least two levels of gas concentration discernability. The bridge circuit outputs distinguishable voltage levels for high gas concentrations in response to receiving the low voltage level. Additionally, the bridge circuit outputs distinguishable voltage levels for low gas concentrations in response to receiving the high voltage level.
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Duesler John S.
Newman Robert L.
Bourgeois Mark P.
CTS Corporation
Starkweather Michael W.
Wiggins J. David
Williams Hezron
LandOfFree
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