When the temperature measurement, generally should follow environment using thermal resistance at low temperature, high temperature environment using thermocouple sensor, in 500 & deg; C, thermal resistance temperature measurement accuracy, and better prices, more than 500 & deg; C, thermocouple temperature measurement is accurate, then use protection tube of different high temperature range?


- in 500 800° C, K type thermocouple, J type thermocouple is pretty good, the choice of the thermocouple protection tube is very much also, such as 304 stainless steel, 321 stainless steel, if there is a corrosive substance measure temperature in the atmosphere, you can choose to use 316 or 316 l stainless steel.
- in 800 High temperature 1050 ℃, which is, usually choose 304 stainless steel or stainless steel (2520 310年代) , up to 2520 stainless steel resistant to 1050 degrees, it is made of austenitic stainless steel, chromium nickel has good oxidation resistance, corrosion resistance, due to the high proportion of chromium and nickel, 310 s own creep strength, can continuous measuring temperature at high temperature, has a good resistance to high temperature performance, economic price, high cost performance.
when the temperature above 1000 ℃ for a long time, ordinary stainless steel is difficult to bear high temperature, then recommends two kinds of alloy materials, which is the most high temperature USES, GH3030 can withstand 1100 ℃, GH3039 can be resistant to 1300 ℃, both for the nickel base alloy material, high temperature resistance, corrosion resistance is very good also. In 1300 & deg; C above, alloy or stainless steel material is hard enough, at this time is the most use of ceramic materials, and more widely is high aluminum tubes and corundum, highest can resist 1600 & deg; C。 In the 1300 - 1600 ℃ range, corundum tube is widely used, some even designed a double corundum tube, this is in order to prolong the service life of thermocouple protective sleeve under the environment of high temperature. Other commonly used thermocouple protection tube material.
the above mentioned the commonly used high temperature thermocouple probe cases. Welcome to communicate with our three chang instrument, and welcome to visit my company.