thermocouple
ther·mo·cou·ple
noun \ˈthər-mə-ˌkə-pəl\Definition of THERMOCOUPLE
: a device for measuring temperature in which a pair of wires of dissimilar metals (as copper and iron) are joined and the free ends of the wires are connected to an instrument (as a voltmeter) that measures the difference in potential created at the junction of the two metals
See First Known Use of THERMOCOUPLE
1890
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