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.
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TYPE
|
Chemical Composition%
|
Ni
|
Cr
|
Mn
|
Si
|
Mg
|
NP
|
rest
|
13.7~14.7
|
/
|
1.2~1.6
|
0.01
|
NN
|
rest
|
0.02
|
/
|
4.2~4.6
|
0.5~1.5
|
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TYPE
|
EMF Versus Pt.67(mv)
|
100℃
|
200℃
|
400℃
|
600℃
|
800℃
|
1000℃
|
NP
|
1.755~1.813
|
3.910~3.976
|
8.880~8.959
|
14.307~14.433
|
20.012~20.180
|
32.313~32.525
|
NN
|
0.975~1.005
|
1.954~1.988
|
4.035~4.075
|
6.212~6.274
|
8.318~8.402
|
8.807~8.907
|
NP-NN
|
2.730~2.818
|
5.864~5.962
|
12.915~13.033
|
20.519~20.707
|
28.330~28.582
|
8.807~8.907
|
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Type
|
Density at 20℃ (g/cm³)
|
Melting point (℃)
|
Tensile Strength(Soft annealed condition in 20℃)(Mpa)
|
Elongation(Soft annealed condition in 20℃)(%)
|
Resistivity at 20℃ (μΩ.m)
|
NP
|
8.5
|
1410
|
≥620
|
≥25
|
0.97
|
NN
|
8.6
|
1340
|
≥550
|
≥30
|
0.33
|
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