k type thermocouple is a temperature sensor using platinum (PT) resistance and temperature has a certain functional relationship, because of its high precision, large measurement range, reproducibility and stability. Can directly measure the surface temperature of various liquids, vapors, gases and solids. Especially suitable for installation in special miniaturized temperature places, pipe narrow, bending, fast response requirements. Temperature sensor specifications: 1. The temperature range of use: K (- 50 ~ 1300 ° C), S (50 ~ 1700 ° C), T (200 ~ 350 ° C),E (0 ~ 800 ° C), J (0 ~ 1000 ° C), B (300 ~ 1800 ° C), N (0 ~ 1300 ° C) PT100: -200 to 500℃ for Class A, -200 to 600℃ for Class B Cu50 ( -50 ~ 150℃ ) , Cu100 ( -50 ~ 150℃ ) 2. Use the 2/3-wire interface 3. Accuracy from Class I, Class II Features: 1. High precision and good stability; 2. High sensitivity and good linearity; 3. Short response time and good compatibility; 4. Compact structure, easy installation, good waterproof performance