Datasheet · Type N · Rev. 08

Type N Bare Wire
Nicrosil / Nisil

Solid single-strand thermocouple wire. φ0.025mm ultra-fine to φ5.0mm standard. Bright or oxidized finish.

Type N Bare Wire: φ0.025mm – φ5.0mm, −270°C to +1300°C, IEC 60584-1 Class 1

Ø range

φ0.025mm – φ5.0mm

Temp

−270°C to +1300°C

EMF tol.

±1.5°C (0–375°C) / ±0.4% (375–1000°C)

Testing

100%

Technical Specifications

Type N Bare Wire — Nicrosil / Nisil at −270°C to +1300°C, solid single strand from φ0.025mm – φ5.0mm, supplied to IEC 60584-1 Class 1.

How to specify Type N Bare Wire

1. Confirm the alloy for your operating temperature — Nicrosil / Nisil, rated −270°C to +1300°C in air.
2. Pick the conductor diameter from φ0.025mm – φ5.0mm (diameter tolerance ±0.005mm (fine) / ±0.02mm (standard)) — solid single-strand Nicrosil / Nisil at the ultra-fine end of the −270°C to +1300°C range.
3. Choose the temper condition for this N · Nicrosil / Nisil wire — Hard (cold-drawn) / Soft (annealed) / Bright finished. The temper is chosen for the solid N sensing element held in the furnace or panel.
4. Choose the surface finish for N · Nicrosil / Nisil — Bright / Oxidized / Electro-polished. Finish is selected for the atmosphere the N element will sit in.
5. Choose the packaging — DIN 125 spool / Coil / Custom reel, standard coil weights 5kg / 10kg / 20kg standard. Spooled to protect the N solid conductor in transit and handling.
6. Quote Type N Bare Wire against IEC 60584-1 Class 1 and request the MTC / EMF calibration certificate with the batch number for traceability.

Which thermocouple type fits the job

These are the N-type ranges as they apply to the solid single-strand form described on this page. Confirm the type first, then pick the conductor diameter.

Type	Alloy	Range	EMF tolerance
K	Chromel / Alumel	−200 … +1370 °C	±1.5°C (0–375°C) / ±0.4% (375–1000°C)
N this page	Nicrosil / Nisil	−270 … +1300 °C	±1.5°C (0–375°C) / ±0.4% (375–1000°C)
T	Copper / Constantan	−200 … +350 °C	±0.5°C (−40–125°C) / ±0.4% (125–350°C)

See the full 5-type comparison →

Verification & quality evidence

• IEC 60584-1 Class 1 / ASTM E230 / DIN EN 60584
• 100% eddy-current + resistance + dimensional · MTC · EMF calibration certificate · Furnace batch traceability
• Third-party testimonials and site references are being collected for this product line — ask for Type N Bare Wire reference contacts in comparable static installations when you request a quote.

Frequently Asked Questions

What makes Type N more stable than Type K above 1000 °C?

The Nicrosil positive leg (NiCrSi 84.4/14.2/1.4) contains 1.4% silicon, which forms a protective SiO₂ sub-layer and suppresses the chromium oxidation that causes green rot. Type N drift stays within ±1 °C after 500 h at 1000 °C.

What temperature range and diameters does Type N bare wire cover?

−270 °C to +1300 °C, in diameters from φ0.025 mm to φ5.0 mm.

Where is Type N bare wire specified?

Vacuum furnaces, aerospace pyrometry to AMS 2750, gas turbine exhaust monitoring and semiconductor processes — wherever sensor replacement is costly or drift over a long service interval matters.