A thermocouple protection tube is a sleeve that protects the core of a thermocouple.

1, thermocouple (thermocouple) is a temperature measurement instrument commonly used in temperature measuring elements, it directly measures the temperature, and converts the temperature signal into thermoelectric motive force signal, through the electrical instrument (secondary instrument) into the temperature of the measured medium.

2, the shape of various thermocouples is often very different due to need, but their basic structure is roughly the same, usually composed of thermal electrodes, insulating sleeve protection tube and junction box and other main parts, usually and display instrument, recording instrument and electronic regulator supporting use.