Resistance Temperature Detector

RTD (resistance temperature detector) temperature sensors are devices that change their resistance relative to changes in temperature. The specific metals used in RTD devices show a known change in resistance as the temperature fluctuates. These are available in a range of resistance values from 10 to 1.85K ohms and each has a range of resistance tolerances to consider. They can be free-hanging, panel mount, chassis mount, surface mount, or through-hole.