||Temperature measuring rang ℃
||Good linearity of thermoelectric force,good stability, good oxidation resistance,it is the most widely used temperature measuring element.
||It is not applicable to reducing atmosphere,which is affected by changes of aging and the changes of short - range ordered structure
||It has all the advantages of K-type thermal resistance，the effect of short - range ordered structure change is small.
||It is not applicable to reducing atmosphere,which is affected by changes of aging.
||NiCr - Constantan
||In the existing thermal resistance，the thermoelectric force is the highest, the sensitivity is high, and the two poles are non magnetic.
||It is not applicable to reducing atmosphere, with low thermal conductivity and micro hysteresis phenomenon.
||Fe - Constantan
||It can be used in reducing atmosphere, and the thermoelectric force is higher than K.
||Iron is easy to rust, thermoelectric characteristics drift is large.
||It can be used in reducing atmosphere, good linearity of thermoelectric force,good low temperature characteristics,good stability.
||Low operating temperature,the copper of positive electrode is easy to oxidize, and the thermal conduction error is large.
||It is applicable to oxidizing atmosphere, and can be used in vacuum for a short time. High precision, good stability, not affected by aging changes, oxidation resistance and chemical corrosion resistance , can be used as standard thermal resistance.
||It is not applicable to reducing atmosphere（Especially H2, metal vapor）and vacuum environment，the price is high, the sensitivity is low, and the linearity of thermoelectric force is not good.
||Applicable to more than 1000 ℃, thermoelectric force is smaller,can need not compensating lead wire, oxidation resistance, chemical corrosion resistance.
||It can not be used below 600 ℃,the sensitivity is low, and the linearity of thermoelectric force is not good.