N -type thermocouple temperature sensor: Nicrosil/NISIL with temperature sensor a Nicrosil (nickel content is 14%, chromium content is 1.5%, silicon content is 1%), and an anode pillar (nickel content is 4.5 %, Silicon content is 1%, magnesium content is 1%) cathode pillar.
 
The general application range of N -type thermocouple is -270 1300 ° C (-450 ー 2372 ° F). It is developed to overcome several problems inherent in the K -type thermocouple temperature sensor.
 
This thermocouple temperature sensor has excellent thermoelectric stability, which can be compared with the platinum -based thermal power puppet. It has a good anti -high temperature oxidation and is very suitable for accurate measurement in air below 1300 ° C. In the vacuum or controllable atmosphere, the temperature of 1300 ° C can be afforded according to the different cases and diameter. Various experiments show that the performance of the N -type thermocouple is similar to that of the platinum -based thermostat, and the drifting amount between 1000 ー 1200 ° C is 10 times smaller than the K -type thermocouple.
 
Moreover, in the nuclear environment, the N type is more stable than the K type, and the K type has always been the choice of sensors. High stability and anti -high temperature oxidation enables the N type to be suitable for high temperature measurement without cost platinum (B, R, S) type. It has better stability than type K in nuclear applications and is becoming more and more popular.
 
Within the temperature range of 300 ° P 600 ° C, the crystallization phenomenon of nickel chromium alloys causes the sensitivity drift of the reversible thermostic puppet. Even if the temperature used in the use of 900 and 1300 ° C, the part of the temperature must still be between 300 and 600 ° C within the application form (eg, the furnace mouth). Type N thermocouple is easily affected by this drift, but the sensitivity to aging is at least 50% lower than the K -type thermocouple.