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℃。
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||EMF Versus Pt.67(mv)|
|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)|