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FAQ00634 of Temperature Controllers FAQ

FAQ No. FAQ00634

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What is "Thermocouple"?


Thermocouple temperature sensors are constructed using two dissimilar metals that are joined together. The junctions are called the measuring junction and the reference junction (output terminal side). A thermoelectromotive force is generated between the junctions with a fixed correlation to the temperature providing the difference in temperature.

Therefore, the temperature at the measuring junction can be determined from the thermoelectromotive force when a fixed temperature is maintained at the reference junction.

Thermocouple temperature sensors are capable of measuring the highest temperatures among contact temperature sensors by using this measurement method.

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