elementary radiation pyrometer

instrument

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June 26, 2026

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A radiation pyrometer is an instrument used to measure very high temperatures, such as those found inside furnaces. Instead of touching the object, it measures the thermal radiation emitted by it.12

An elementary radiation pyrometer works by focusing the object's radiation onto a thermopile, which is a group of thermocouples. This thermopile generates an electrical voltage proportional to the radiation it receives. Through calibration, this voltage can be translated into the temperature of the hot object.1

Other types of pyrometers include optical pyrometers, resistance pyrometers, and thermocouple pyrometers, each utilizing different principles to measure temperature.1

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pyrometer
In an elementary radiation pyrometer, the radiation from the hot object is focused onto a thermopile, a collection of thermocouples, which generates an electrical voltage that depends on the intercepted radiation. Proper calibration permits this electrical voltage to be converted to the temperature of the hot object.
Read More
In an elementary radiation pyrometer, the radiation from the hot object is focused onto a thermopile, a collection of thermocouples, which generates an electrical voltage that depends on the intercepted radiation. Proper calibration permits this electrical voltage to be converted to the temperature of the hot object.
Read More