pyrometer
noun
an apparatus for measuring high temperatures that uses the radiation emitted by a hot body as a basis for measurement.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The dog's nose is cold even when his tongue is reeking; and as he walked slowly along, his exterior showed the proper thermo-metric nonchalance—it was not the time for a pyrometric measurement within the heart.
From Wilson's Tales of the Borders and of Scotland, Volume XXII by John Mackay Wilson