thermocouple

n. thermoelectric couple for measuring differences in temperature (Physics)

In electronics, thermocouples are a widely used type of temperature sensor and can also be used as a means to convert thermal potential difference into electric potential difference. They are cheap and interchangeable, have standard connectors, and can measure a wide range of temperatures. The main limitation is precision; system errors of less than 1 °C can be difficult to achieve.
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Ther·mo·cou·ple n. A thermoelectric device used to measure temperatures accurately, especially one consisting of two dissimilar metals joined so [more]Thermocouple - Community and Resources

Noun
1. a kind of thermometer consisting of two wires of different metals that are joined at both ends; one junction is at the temperature to be measured and the other is held at a fixed lower temperature; the current generated in the circuit is proportional to the temperature difference
(synonym) thermocouple junction
(hypernym) thermometer

n. thermocouple, thermoelectric couple for measuring differences in temperature (Physics)