KJT high and low temperature resistant proximity switches are used for detection, positioning and counting in high temperature and harsh environments. The probe can withstand medium temperatures of -40℃~230℃. This product operates stably in high-temperature environments of -40°C to 230°C and has high reliability, short circuit, and reverse polarity protection. Therefore, it is widely used in related manufacturing industries such as steel, metallurgy, glass, and chemical fiber plant transportation pipelines. At the same time, it can meet the requirements for detecting metals or non-metals in low-temperature and severe cold environments.