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.
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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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