pyrometer

Any of various thermometers used for measuring high temperatures.

An instrument, in the form of a simple metallic bar, employed by Muschenbroek, about 1730, for measuring the changes produced in the dimensions of solid bodies by the application of heat. ; ; ; ; ; ; ; ; ;

An instrument used for measuring the expansion of solid bodies by heat.

An instrument for measuring degrees of heat above those indicated by the mercurial thermometer.

A thermometer designed to measure high temperatures.

An instrument for measuring the thermal expansion of solids.

a thermometer designed to measure high temperatures