N
Type N — Nicrosil / Nisil Thermocouple
Nicrosil (Ni-14.2%Cr-1.4%Si) / Nisil (Ni-4.4%Si-0.1%Mg). Developed as an improved alternative to Type K. Silicon additions stabilize the alloy structure and eliminate green rot. Preferred for long-term service above 1000°C.
ASTM E230Base Metal
At-a-Glance Specifications
1260°C
±2.2°C or ±0.75%
±1.1°C or ±0.4%
ASTM E230
EMF Reference Values — Type N (ASTM E230)
Selected EMF values in millivolts referenced to 0°C. Full tables available on the EMF Tables page.
Key EMF Values
0°C=0.000, 200°C=5.913, 400°C=12.974, 600°C=20.613, 800°C=28.455, 1000°C=36.256, 1200°C=43.846 mV
Limits of Error — ASTM E230 / IEC 60584-2
| Class | Range | Limit of Error |
|---|---|---|
| Standard | −270 to +1260°C | ±2.2°C or ±0.75% (whichever greater) |
| Special | −270 to +1260°C | ±1.1°C or ±0.4% (whichever greater) |
ASTM E230 — Applicable Standard
All specifications, EMF-temperature tables, and tolerance limits for Type N are defined under ASTM E230. Consult the current edition of this standard for complete reference function coefficients and limits of error across all temperature sub-ranges.