thermocouple

noun

Etymology: Etymology tree Proto-Indo-European *gʷʰer-der. Ancient Greek θερμός (thermós)der. English thermo- English couple English thermocouple From thermo- + couple.

1. A transducer consisting of two different metals welded together at each end; a voltage is produced that is proportional to the difference in temperature between the two junctions (one of which is normally held at a known temperature)