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T, J, N, S, R type, type B, K type, E type thermocouple material ingredient _ instrument, etc

by:JVTIA     2020-10-28
Thermocouple dividing hot electrode materials using temperature range ( ℃) The positive negative T pure copper anode, cathode copper and nickel - 200 - + 300 ℃ J type iron anode, cathode copper and nickel - 200 - + 600 ℃ N type anode nickel chrome silicon, silicon anode nickel - 200 - The positive platinum rhodium + 1200 ℃ S type, rhodium content is 10%, the cathode pure platinum 0 1400 ℃ R type anode platinum rhodium rhodium content is 13%, the cathode pure platinum 0 1400 ℃ B type anode platinum rhodium rhodium content is 30%, the cathode platinum rhodium rhodium content is 6%, 0 1400 ℃ K type anode nickel chromium, nickel cathode silicon - 200 - The positive nickel chrome + 1000 ℃ E, the cathode copper and nickel - 200 - Any two different conductors (+ 700 ℃ Or a semiconductor) Can be made into thermocouple, but as a practical temperature measurement component, is various to the requirement of it. In order to guarantee the reliability of engineering, as well as the measuring accuracy of enough, not all materials can form a thermocouple, generally electrode materials of thermocouple, basic requirements are: ( 1) , within the scope of the temperature measurement, thermoelectric properties of stability, not change with time, there is plenty of physical and chemical stability, less susceptible to corrosion and oxidation; ( 2) Electrodes, thermocouple temperature coefficient of resistance small, high electrical conductivity, specific heat; ( 3) , the temperature of thermoelectric ShiYao big and between thermoelectric potential and temperature is linear or close to linear single valued function relation; ( 4) , electrode material of thermocouple replication is good, high mechanical strength, simple manufacturing process, the price is cheap.
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