noun
A device for measuring high temperatures, especially in industrial or scientific contexts.
工場ではパイロメーターを使って炉の温度を測定している。
In the factory, they use a pyrometer to measure the furnace temperature.
温度計 is a general thermometer, while パイロメーター specifically measures very high temperatures, often without contact.
Borrowed from English 'pyrometer', which itself comes from Greek roots meaning 'fire' and 'measure'.