noun \pī-ˈrä-mə-tər\

Definition of PYROMETER

:  an instrument for measuring temperatures especially when beyond the range of mercurial thermometers
py·ro·met·ric \ˌpī-rə-ˈme-trik\ adjective
py·ro·met·ri·cal·ly \-tri-k(ə-)lē\ adverb
py·rom·e·try \pī-ˈrä-mə-trē\ noun


International Scientific Vocabulary
First Known Use: 1796


noun    (Concise Encyclopedia)

Instrument for measuring relatively high temperatures, as in furnaces. Most pyrometers work by measuring radiation from the body whose temperature is to be measured (radiation devices have the advantage of not having to touch the material being measured). Optical pyrometers measure the temperature of glowing bodies by comparing them visually with an incandescent filament of known temperature whose temperature can be adjusted. In resistance pyrometers, a fine wire is put in contact with the object; the instrument converts the change in electrical resistance caused by heat to a reading of the temperature of the object.


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