There are many different types of temperature measurement devices, each one tailored to meet a specific need. This fact sheet provides information on the types, use, and calibration of temperature measuring devices. It also provides guidelines for the selection and proper maintenance of common thermometers and temperature sensors.
Thermocouples are made of two dissimilar metals, joined to produce a voltage when the measured temperature deviates from the reference temperature. The selection of the two metals determines the thermocouple’s application temperature, measuring environment, required service life, accuracy, and cost.