Method of operating a resistive heat-loss pressure sensor
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United States of America Patent
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Jul 31, 2007
Grant Date -
Feb 2, 2006
app pub date -
Jun 7, 2005
filing date -
Jul 28, 2004
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Abstract
In a resistively heated heat-loss pressure gauge, electrical current is switched between a sensing element and a compensating element at different duty cycles. As a result, the sensing element is heated relative to the compensating element. A fixed resistance is placed in series with at least the compensating element. The current source applies current to heat the sensing element to a temperature at which the resistance of the sensing element matches the combined resistance of the compensating element and the fixed resistive element.
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