chapter  68
Resistive Thermometers
Pages 22

Temperature, the most frequently measured process variable on the planet, can be measured in various ways. Many temperature measurement devices incorporate a resistive material that when exposed to an environment, the resistance will change in response to the temperature in a predictable manner. œis style of sensor is referred to as a resistance temperature detector (RTD).œe resistive materials used are nickel, copper, and most commonly platinum. RTDs designed with platinum provide the most stable resistance versus temperature relationship and therefore can achieve accuracies capable for use as a primary reference standard.