Apparatus and methods for heat loss pressure measurement
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United States of America Patent
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Mar 15, 2005
Issued Date -
N/A
app pub date -
May 24, 2004
filing date -
Oct 16, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heat loss gauge for measuring gas pressure in an environment includes a resistive sensing element and a resistive compensating element. The resistive compensating element is in circuit with the sensing element and is exposed to a substantially matching environment. An electrical source is connected to the sensing element and the compensating element for applying current through the elements. The current through the sensing element is substantially greater than the current through the compensating element. Measuring circuitry is connected to the sensing element and the compensating element for determining gas pressure in the environment to which the sensing element and compensating element are exposed based on electrical response of the sensing element and the compensating element.
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