Typ N Thermocouple Wire Description
NiCrSi-NiSiMg thermocouple wire has been developed to address the limitations observed in the Type K thermocouple. It offers equivalent accuracy and temperature limits as the Type K. Type N is slightly more expensive. It provides improved repeatability between 300 °C and 500 °C (572°F and 932°F) compared to Type K.

Typ N Thermocouple Wire Specifications
Type
|
Chemical Composition in %
|
Ni
|
Cr
|
Mn
|
Si
|
Mg
|
NiCrSi (Anode)
|
Equilibrium
|
13.7–14.7
|
/
|
1.2–1.6
|
0.01
|
NiSiMg (Cathode)
|
Equilibrium
|
0.02
|
/
|
4.2–4.6
|
0.5–1.5
|
Type
|
EMF versus Pt.67 (mV)
|
100°C
|
200°C
|
400°C
|
600°C
|
800°C
|
1000°C
|
NiCrSi (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
|
NiSiMg (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
|
NiCrSi–NiSiMg (NP-NN)
|
2.730–2.818
|
5.864–5.962
|
12.915–13.033
|
20.519–20.707
|
28.330–28.582
|
41.12–41.432
|
Type
|
Density at 20°C (g/m³)
|
Melting Point (°C)
|
Tensile Strength (annealed at 20°C) (MPa)
|
Elongation (annealed at 20°C) (%)
|
Specific Resistivity at 20°C (μΩ·m)
|
NiCrSi (NP)
|
8.5
|
1410
|
≥620
|
≥25
|
0.97
|
NiSiMg (NN)
|
8.6
|
1340
|
≥550
|
≥30
|
0.33
|
Typ N Thermocouple Wire Applications
- Temperature profiling in furnaces and combustion ovens
- Temperature measurement of gas turbine and engine exhausts
- Monitoring temperatures during production and smelting processes in the steel, iron and aluminium industries