Thermocouple Material

Thermocouple Material

Thermocouple material includes wire, strip and protection tubes for use at temperatures up to 1260°C (2300°F). For many industrial heating processes, particularly those carried out at high temperatures, a thermocouple is the most accurate, convenient and simple method of temperature measurement.

Each individual arm is calibrated against platinum and the EMF values are shown on each coil or spool.


Our product program for thermocouples includes:

  • Thermocouple wire - round and flat
  • Thermocouple strip
  • Thermocouple extension leads/extension cables
  • Thermocouple compensating cables
  • Bunched wire
  • Thermocouple protection tubes

Our program also includes a bi-filar side-by-side configuration in some size ranges.

Types of thermocouple wire

Code +Positive leg -Negative leg
N Nicrosil (NP) Nisil (NN)
K Thermothal® KP Thermothal® N (KN)
K Thermothal® KM Thermothal® N (KN)
E Thermothal® P (EP) Cuprothal® (EN)
J Iron (JP) Cuprothal® (JN)
T Copper* Cuprothal®(TN)

*Not produced by Alleima AB


Size range

Wire: Kanthal® thermocouple wire ranges from 0.05 to 8.0 mm (0.0019 to 0.315 inch). Thermocouple wire in the size range 0.0254 mm to 0.51 mm (0.001 to 0.0201 inch) can be supplied with or without an insulating coating.

Strip: Standard sizes for thermocouple strip range from thickness 0.10 to 3.0 mm (0.0039 to 0.181 inch) and width from 4 to 195 mm (0.157 to 7.68 inch).


Kanthal® thermocouple alloys are supplied according to the following standards shown below. Where older standards are still in use (which are not equivalent to those listed below), we can supply different EMF values upon request.

ASTM (American Society for Testing and Materials) E 230
ANSI (American National Standard Institute) MC 96.1
IEC (European Standard by the International Electrotechnical Commission 584)-1/2/3
DIN (Deutsche Industrie Normen) EN 60584 -1/2
BS (British Standards) 4937.1041, EN 60584 - 1/2
NF (Norme Française) EN 60584 -1/2 - NFC 42323 - NFC 42324
JIS (Japanese Industrial Standards) C 1602 - C 1610
GOST (Unification of the Russian Specifications) 3044
Alloys for extension leads and compensating cables

Thermocouple Compensating cable Alloy Temperature
range °C (°F)
Type K WPX
Cuprothal® WX
0 to +150 (+32 to 300)
Type K VPX
Cuprothal® VX
0 to +100 (+32 to 200)
Type S, R* (Pt/PtRh) Cu
Cuprothal® SX
0 to +100 (+32 to 200)
0 to +200 (+32 to 400)

*Not within the Kanthal program

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