cooled-tube pyrometer

cooled-tube pyrometer

[′küld ‚tüb pī′räm·əd·ər]
(engineering)
A thermometer for high-temperature flowing gases that uses a liquid-cooled tube inserted in the flowing gas; gas temperature is deduced from the law of convective heat transfer to the outside of the tube and from measurement of the mass flow rate and temperature rise of the cooling liquid.