Nicrosil-Nisil thermocouple (Type N)

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℃.

Category:

Thermocouple Wire

Key word:

Thermocouple Wire

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Product Details

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%
TYPE	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

Standard: IEC60584-1

TYPE	EMF Versus Pt.67(mv)
TYPE	100℃	200℃	400℃	600℃	800℃	1000℃
NP	1.762~1.806	3.917~3.969	8.880~8.959	14.307~14.433	20.012~20.180	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	2.742~2.806	5.876~5.950	12.915~13.033	20.519~20.707	28.330~28.582	36.102~36.410

Physical Properties:

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