Thermocouple (THERMOCOUPLE) is a commonly used temperature measuring element in temperature measuring instruments. It directly measures the temperature and converts the temperature signal into a thermoelectromotive force signal, which is converted into the temperature of the measured medium through an electrical instrument (secondary instrument).
The appearance of various thermocouples is often very different due to needs, but their basic structure is roughly the same, usually composed of the main parts such as hot electrodes, insulating sleeve protection tubes and junction boxes, usually with display instruments, recording instruments and electronic adjustment Matching device. The packaging technology of the Uster temperature sensor protects the temperature-sensing element well, so that it does not directly contact the measured medium, avoiding or reducing the erosion of harmful media, the erosion and radiation of flame and airflow, and mechanical damage. It is used to fix and support the temperature sensing element of the sensor.
In mild corrosion and general industrial applications, 304 and 316 (316L) are the most widely used stainless steel protective materials.