Type K, N, J, T, E — Bare Wire, Stranded Wire & Alloy Ingots / Wire Rods. φ0.025mm to 5.0mm.
RAS Thermal manufactures precision thermocouple alloy conductors with full in-house control from vacuum induction melting to ultra-fine wire drawing. Our conductors are used in aerospace engine testing, power generation turbines, petrochemical reformers, industrial heat treatment furnaces and automotive R&D facilities worldwide. Every metre of wire is traceable to a unique furnace batch number with full chemical composition and EMF calibration data archived and retrievable by furnace batch number.
| Type | Positive Leg (+) | Negative Leg (−) | Temp. Range | Sensitivity |
|---|---|---|---|---|
| Type K | Chromel (NiCr 90/10) | Alumel (NiAl 95/5) | −200 to +1370 °C | ~41 µV/°C |
| Type N | Nicrosil (NiCrSi) | Nisil (NiSiMg) | −270 to +1300 °C | ~39 µV/°C |
| Type J | Iron (Fe 99.5%) | Constantan (CuNi 55/45) | −40 to +750 °C | ~55 µV/°C |
| Type T | Copper (Cu 99.9%) | Constantan (CuNi 55/45) | −200 to +350 °C | ~43 µV/°C |
| Type E | Chromel (NiCr 90/10) | Constantan (CuNi 55/45) | −200 to +900 °C | ~68 µV/°C |
| Form | Description | Typical Diameter |
|---|---|---|
| Bare Wire | Solid single-strand conductor, bright or oxidised finish | φ0.025 – 5.0 mm |
| Stranded Wire | 7, 19 or 37 strand constructions for flexibility | φ0.1 – 5.0 mm |
| Alloy Ingots / Wire Rod | Vacuum-melted thermocouple alloys, cast ingot or φ5.5 mm rod | φ5.5 mm rod |
| Diameter Tolerance | ±0.005 mm (fine) / ±0.02 mm (standard) |
| EMF Tolerance (Class 1) | ±1.5 °C (0–375 °C) / ±0.4% (375–1000 °C) |
| Surface Finish | Bright / Oxidised / Electro-polished |
| Condition | Hard (cold-drawn) / Soft (annealed) / Bright finished |
| Packaging | DIN 125 spool / DIN 160 spool / Coil / Custom reel |
| Coil Weight | 5 kg / 10 kg / 20 kg standard |
| Traceability | Furnace batch number engraved on every spool |
| Test Data Archive | Retrievable by batch number |
| Third-Party Inspection | SGS / Bureau Veritas available on request |
IEC 60584-1:2013 — Thermocouples — Part 1: EMF specifications and tolerances
ASTM E230/E230M — Standard Specification for Temperature-EMF Tables for Standardized Thermocouples
DIN EN 60584 — German adoption of IEC 60584
JIS C 1602 — Japanese Industrial Standard for Thermocouples
GB/T 16839 — Chinese National Standard for Thermocouples
AMS 2750F — Pyrometry (aerospace heat treatment)
Specify: Thermocouple Type | Product Form | Diameter | Condition | Tolerance Class | Quantity (kg or m) | Packaging | Surface Finish | Standard Required
Email: info@rasthermo.com | Technical: engineering@rasthermo.com