WRET-02 Nickel-chromium - copper-nickel thermocouple is a bare-type thermocouple which used in the occasions of 0～400℃ without protect tube. The thermocouple has no junction box and fixed device. The thermocouples appearances cover brass protective tube and equipped with soft extend wire which can bend freely. The case is small and structure is simple. It is suitable for analysis of industrial temperature measurement instruments and equipment