There are assorted reasons that affirm the popularity of thermocouple sensors among customers:

• Self-powered: As the output emf increases according to temperature changes, there is no necessity for an external power source. Thus, thermocouples are self-sufficient in their operation.
• Simple and Robust: In terms of design, these sensors are simple yet tough. They are constructed with different types of high strength metals, including aluminum, iron, copper, and platinum. This allows the sensors to be used in a variety of demanding industrial applications.
• Inexpensive: Thermocouples are known to be inexpensive in terms of price. When compared with RTDs, they are found to be nearly three times less expensive than RTDs.
• Wide Temperature Range: Thermocouples directly measure the temperature in an application. They have the capabilities to measure temperatures up to 1900 degree centigrade.