Thermocompressors are used in a wide range of processes to save energy. They compress low pressure steam to usable pressure levels and thereby reclaim the heat energy in the low pressure steam, which otherwise would be wasted. The low pressure steam is entrained by the thermocompressor and compressed to a reusable, where it can be effectively utilized for its heat or thermal value.

Thermal conductivity of a medium can be measured indirectly, using a thermocouple gauge. A definite current is passed through a metal strip of resistance element in a tube with the medium whose pressure is to be measured. The metal strip has a thermocouple welded to it. Voltage developed by the thermocouple is used as a measure of the temperature of the strip and hence that of the pressure in the medium. Its operation is based on filament-cooling principles. It can be used for measuring low gas pressures in the range from 0.1 mm Hg to 10~4 mm Hg.