Thermocouple & Extension Wire

Thermocouples are sensors that measure temperature across a wide range of applications in most industrial environments, and thermocouple extension wires used to create a hardwearing connection between the thermocouple probe to a readout instrument. These extension wires are used to extend a thermocouple signal back to the instrument and cannot be used in a thermocouple probe. At RS Components, we have a curated range of thermocouple extension wires suitable for J, K, L, N, R/S, RTD, S and T thermocouples from leading brands in the industry, including Jumo, Keysight Technologies, Reckmann and our own RS PRO.

What is thermocouple extension wire made from?

Thermocouple extension wire is made from a lower grade of wire than that used in thermocouple probes, so is more economical when used at length. It's typically made with colour-coded (usually PVC) insulation applied to each wire leg. The negative lead is usually insulated in red and the positive lead is the colour of the thermocouple. For added durability and flexibility, a metal overbraid is applied to the insulated wire. For PVC wire this is a tinned copper overbraid, and for PFA it's stainless steel. This added layer protects the wire against abrasion.

Why use thermocouple extension wire?

Thermocouple extension wire is only used to extend the distance between a thermocouple probe and the instrument reading the signal and cannot be used as part of the probe itself. Thermocouple grade wire is used instead to make the sensing point of the thermocouple, as extension wire has a lower ambient temperature limit, which means may return a signal representing higher temperature readings than those that would be returned by a proper thermocouple probe, and therefore extension wire can't be used in a thermocouple's sensing point. Thermocouple wire can be used as an extension if necessary.


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Beskrivning Pris Thermocouple Type Length Maximum Operating Temperature Screened/Unscreened Core Strands Insulation Material Cable Shape Number of Strands American Wire Gauge Series Standards Met Voltage Rating
RS-artikelnummer 827-5791
VarumärkeRS PRO
318,27 kr
Each
Enheter
T 10m +260°C - 1/0.3mm PTFE Flat Pair 1 - - - -
Nytt
RS-artikelnummer 215-4873
VarumärkeRS PRO
391,70 kr
Each
Enheter
J 10m +260°C Unscreened - PTFE - - - - - -
RS-artikelnummer 407-1450
VarumärkeRS PRO
2 031,39 kr
1 Reel of 25 Metre(s)
Rulle(ar)
RTD 25m +80°C Screened 7/0.2mm PTFE Multicore 7 - - - -
RS-artikelnummer 827-5921
VarumärkeRS PRO
298,00 kr
Each
Enheter
J 25m +260°C - 1/0.508mm PFA Teflon Twisted 1 - - - -
RS-artikelnummer 827-5952
VarumärkeRS PRO
317,54 kr
Each
Enheter
T 25m +260°C - 7/0.2mm PFA Teflon Twisted 7 - - - -
RS-artikelnummer 827-5886
VarumärkeRS PRO
255,81 kr
Each
Enheter
J 25m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
Nytt
RS-artikelnummer 215-4938
VarumärkeRS PRO
353,39 kr
Each
Enheter
K 10m +260°C Unscreened - PFA - - - - - -
RS-artikelnummer 827-5653
VarumärkeRS PRO
432,32 kr
Each
Enheter
T 50m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
Nytt
RS-artikelnummer 215-4898
VarumärkeRS PRO
2 534,76 kr
Each
Enheter
K 100m +260°C Unscreened - PTFE - - - - - -
Nytt
RS-artikelnummer 215-4899
VarumärkeRS PRO
491,57 kr
Each
Enheter
K 10m +260°C Unscreened - PTFE - - - - - -
RS-artikelnummer 827-5592
VarumärkeRS PRO
192,74 kr
Each
Enheter
J 25m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS-artikelnummer 827-6075
VarumärkeRS PRO
448,24 kr
Each
Enheter
K 25m +350°C - 1/0.508mm Glass Fibre Flat Pair 1 - - - -
RS-artikelnummer 827-5640
VarumärkeRS PRO
1 639,91 kr
Each
Enheter
N 100m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS-artikelnummer 827-6034
VarumärkeRS PRO
936,49 kr
Each
Enheter
N 25m +260°C - 7/0.2mm PTFE Twisted 7 - - - -
RS-artikelnummer 827-5606
VarumärkeRS PRO
844,98 kr
Each
Enheter
J 200m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS-artikelnummer 827-5596
VarumärkeRS PRO
405,53 kr
Each
Enheter
J 50m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS-artikelnummer 827-5671
VarumärkeRS PRO
772,39 kr
Each
Enheter
K 50m +105°C Screened 7/0.2mm PVC Twisted 7 - - - -
RS-artikelnummer 827-5883
VarumärkeRS PRO
426,94 kr
Each
Enheter
K 25m +105°C - 13/0.2mm PVC Flat Pair 13 - - - -
RS-artikelnummer 492-9775
VarumärkeRS PRO
1 021,40 kr
Each
Enheter
- 10m +260°C Screened 7/0.2mm PTFE Multicore 7 - - - -
RS-artikelnummer 827-5643
VarumärkeRS PRO
308,13 kr
Each
Enheter
R/S 25m +105°C - 13/0.2mm PVC Flat Pair 13 - - - -