Using the junction between the two metals, a thermocouple is able to detect and record changes in temperature. Those two pieces of metal are linked at one end, and that is where the temperature reading comes from. The metal conductors produce a modest voltage, which may be used to get an estimate of the temperature. A thermocouple may be used as a temperature sensor since it is easy to use, reliable, and inexpensive. Moreover, they are able to monitor a broad temperature range, making them useful in a wide range of contexts, including laboratories, factories, homes, and more.