Pirani Gage

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Pirani Gage

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A thermal conductivity vacuum gage in which an increase of pressure from the zero point causes a decrease in the temperature of a heated filament of material having a large temperature coefficient of resistance, thus unbalancing a Wheatstone bridge circuit (or the circuit is adjusted to maintain the filament temperature constant). </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use