- what is the temperature controller of dividing number Shanghai dragon instrument electric appliance co. , LTD

Thermocouple index number mainly S, R, B, N, K, E, J, T wait for a few kinds. S, R, B belong to precious metal thermocouple, N, K, E, J, T belong to cheap metal thermocouple. S degree, oxidation resistance is strong, are the characteristics of continuous use appropriate in oxidation, the inert atmosphere, long-term use of temperature 1400 ℃, 1600 ℃ in the short term. In all thermocouples, S degree, the accuracy of the highest grade, often used as a standard thermocouple; 吗? 吗? R degree, compared with S degree, in addition to the thermoelectric emfs big by about 15%, other properties can complete the same. B dividing minimal thermoelectric emfs at room temperature, so the ordinary without compensation conductor in the measurement. Its long-term using temperature is 1600 ℃, 1800 ℃ in the short term. Can be applied in oxidizing or neutral atmosphere, also can be used under vacuum conditions in short term. Index number of features is under 1300 ℃ high temperature oxidation resistance ability is strong, the long-term stability of the thermoelectric emfs and short-term thermal cycle of good repeatability, nuclear radiation and low temperature resistance, resistance to local alternative S dividing number of thermocouples. K index number of features is oxidation resistance is strong, continuous use appropriate in oxidation, the inert atmosphere, long-term use of temperature 1000 ℃, 1200 ℃ in the short term. The most common use in all thermocouple; E characteristics of the index number is in commonly used thermocouple, the thermoelectric emfs, the largest is the highest flexibility. Appropriate continuous use in the oxidizing and inert atmosphere, using temperature 0 800℃； 。 J index number can be used for both are the characteristics of oxidizing atmosphere, Using the maximum temperature 750 ℃) , can also be used to recover sexual atmosphere, Using the maximum temperature 950 ℃) And resist the corrosion of gas H2 and CO, used in refining and chemical industry; T index number of features is the highest accuracy in all inexpensive metal thermocouple, are often used to measure the temperature under 300 ℃.