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Nicrosil-Nisil thermocouple (Type N)


Type N thermocouple improves the EMF drift and short term EMF change, compared to type K thermocouple, and has a longer life than type K thermocouple. Therefore, in the industries where temperature control and measurement are especially critical, type N thermocouple has more advantages than other thermocouple as it has long life and stable thermal EMF.



Key word:

Thermocouple Wire


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Product Details


Nicrosil-Nisil thermocouple is the latest base metal thermocouple, developed to improve the drawbacks that type K thermocouple has. The main chemical composition of positive leg Nicrosil(NP) is Ni: Cr: Si≈84.4: 14.2: 1.4; negative leg Nisil (NN) is Ni: Si: Mg≈95.5: 4.4: 0.1. Type N thermocouple also be used in the similar atmospheres that type K works, and the operating temperature range is -200~1300℃。

Type N thermocouple improves the EMF drift and short term EMF change, compared to type K thermocouple, and has a longer life than type K thermocouple. Therefore, in the industries where temperature control and measurement are especially critical, type N thermocouple has more advantages than other thermocouple as it has long life and stable thermal EMF.

 

TYPE Chemical Composition%
Ni Cr Mn Si Mg
NP Bal 13.7-14.7 / 1.2-1.6 0.01
NN Bal 0.02 / 4.2-4.6 0.5-1.5

 

Standard:ANSI/ASTM

TYPE EMF Versus Pt.67(mv)
100℃ 200℃ 400℃ 600℃ 800℃ 1000℃
NP 1.762~1.806 3.917~3.969 8.880~8.958 14.307~14.433 20.010~20.178 25.943~26.149
NN 0.980~1.000 1.959~1.981 4.035~4.075 6.212~6.274 8.318~8.402 10.159~10.261
NP-NN 2.741~2.807 5.877~5.949 12.915~13.033 20.519~20.707 28.330~28.580 36.104~36.408

 

Physical Properties:

Type Density at 20℃
(g/cm3)
Melting point
(℃)
Tensile Strength
(Soft annealed condition in 20℃)
(Mpa)
Elongation
(Softannealed condition in 20℃)
(%)
Resistivity at 20℃
(μΩ.m)
NP 8.5 1410 ≥620 ≥30 1.0
NN 8.6 1340 ≥550 ≥35 0.33

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