small devices placed near the nostrils or mouth to measure air flow by sensing temperature changes; expired air is warmer than inspired air.

A temperature sensor consisting of a pair of wires of dissimilar metals. Temperature is determined by measuring the differences in potential created at the junction of the two wires. You must also have a thermocouple reference temperature sensor in order to measure the thermocouple. For a thorough discussion, see the Measurements chapter in the datalogger manual.

Thermoelectric device used to measure temperatures accurately, especially one consisting of two dissimilar metals joined so that a potential difference generated between the points of contact is a measure of the temperature difference between the points.