What is a Thermocouple?

Thermocouples are commonly used temperature measuring components in temperature measuring instruments. It directly measures the temperature, and converts the temperature signal into the electromotive force signal of the thermoelectric potential, and converts it into the temperature of the measured medium through the electrical instrument. The appearance of various thermocouples is often different due to needs, but their basic structure is roughly the same, usually composed of main components such as thermal electrode insulation sleeve protection tube and junction box, and is usually used in conjunction with display instruments, recording instruments and electronic instruments Regulatory agencies .

 

In industrial production process, the measurement and control of temperature is very important. Thermocouples are one of the most commonly used temperature measuring components in temperature measuring instruments. It directly measures the temperature and converts the temperature signal into a thermal electromotive force signal through an electrical instrument. Converted to the temperature of the measured medium. Thermocouples are widely used. It has the advantages of simple structure, convenient manufacture, wide measurement range, high precision, small inertia, and easy remote transmission of output signals. Thermocouples can be classified in two ways:

1. According to the type of fixture: thermocouple is the main temperature measurement method, and different uses have different requirements for fixtures and technical performance. Therefore, there are six types of thermocouple clamps: non-fixed clamps, threads, fixed flanges, movable flanges, square movable flanges, and tapered protective tubes.

2. Classification by assembly and structure: According to the performance and structure of thermocouples, it can be divided into special thermocouples such as detachable thermocouples, flameproof thermocouples, armored thermocouples and spring fixed thermocouples.