IPA: //paɪˈrɒmɪtə//
KK: /paɪˈrɑːmɪtər/
A device used to measure very high temperatures, often beyond the limits of regular thermometers.
The engineer used a pyrometer to check the temperature of the molten metal.
Pyrometer → It is formed from "pyro-" (from Greek "pur", meaning fire) and "metron" (from Greek, meaning measure). The word "pyrometer" refers to an instrument that measures high temperatures, specifically those related to fire.
Think of 'fire' ('pyro-') being 'measured' ('metron') — that's how a pyrometer works.