Gas detection instrument and method for its operation
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United States of America Patent
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May 3, 2005
Grant Date -
Jun 17, 2004
app pub date -
Dec 10, 2002
filing date -
Dec 10, 2002
priority date (Note) -
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Abstract
A gas detection instrument comprises a combustible gas sensor and associated circuitry, which supplies power to the sensor and measures and displays resulting sensor response. The supplied power is switched between timed pulses of electricity and steady state electricity, with the intermittent electricity being employed only when no significant change in sensor output has been detected. Alternatively, timed pulses of electricity are maintained, and predictive software algorithms are used to give readings for gas concentration during interruption of the power supply. The sensor operation enables the instrument to respond to rapid changes in gas concentration while minimizing power consumption of the sensor.
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