thermocouple vacuum gage

thermocouple vacuum gage

[′thər·mə‚kəp·əl ′vak·yəm ‚gāj]
(engineering)
A vacuum gage that depends for its operation on the thermal conduction of the gas present; pressure is measured as a function of the voltage of a thermocouple whose measuring junction is in thermal contact with a heater that carries a constant current; ordinarily, used over a pressure range of 10-1 to 10-3 millimeter of mercury.
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