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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Omschrijving Prijs 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-stocknr. 236-3820
FabrikantRS PRO
44,47 €
1 Reel of 25 Metre(s)
Reel(s)
K 25m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS-stocknr. 236-3836
FabrikantRS PRO
38,58 €
1 Reel of 25 Metre(s)
Reel(s)
K 25m +400°C Unscreened 1/0.315mm Fibreglass Multicore 1 - - - -
RS-stocknr. 236-3921
FabrikantRS PRO
36,55 €
1 Reel of 25 Metre(s)
Reel(s)
J 25m +105°C Screened 7/0.2mm PVC Multicore 7 - - - -
RS-stocknr. 151-209
FabrikantRS PRO
21,57 €
1 Reel of 10 Metre(s)
Reel(s)
- - - - - - - - - - - -
RS-stocknr. 768-6585
FabrikantRS PRO
29,94 €
Each
Aantal stuks
K 5m +220°C - 7/0.2mm PVC Multicore 7 - - IEC, RoHS Compliant -
RS-stocknr. 768-6581
FabrikantRS PRO
22,57 €
Each
Aantal stuks
K 2m +220°C - 7/0.2mm PVC Multicore 7 - - IEC, RoHS Compliant -
RS-stocknr. 219-4551
FabrikantRS PRO
21,96 €
1 Reel of 25 Metre(s)
Reel(s)
K 25m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS-stocknr. 363-0418
FabrikantRS PRO
44,90 €
Each
Aantal stuks
T 25m +250°C Unscreened 1/0.315mm PTFE Flat Pair 1 - - - -
RS-stocknr. 236-3937
FabrikantRS PRO
89,61 €
1 Reel of 25 Metre(s)
Reel(s)
J 25m +400°C Screened 7/0.2mm Fibreglass Multicore 7 - - - -
RS-stocknr. 407-1523
FabrikantRS PRO
113,40 €
1 Reel of 20 Metre(s)
Reel(s)
K 20m +250°C Unscreened - Kapton Single Core - - - RoHS Compliant -
RS-stocknr. 827-5637
FabrikantRS PRO
39,16 €
Each
Aantal stuks
N 25m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS-stocknr. 827-5631
FabrikantRS PRO
73,38 €
Each
Aantal stuks
N 50m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS-stocknr. 363-0389
FabrikantRS PRO
28,71 €
Each
Aantal stuks
K 25m +250°C Unscreened 1/0.2mm PTFE Twin Twisted 1 - - - -
RS-stocknr. 611-7889
FabrikantRS PRO
125,45 €
1 Reel of 100 Metre(s)
Reel(s)
K 100m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS-stocknr. 236-3959
FabrikantRS PRO
37,93 €
1 Reel of 25 Metre(s)
Reel(s)
K 25m +105°C Screened 7/0.2mm PVC Multicore 7 - - - -
RS-stocknr. 219-4668
FabrikantRS PRO
15,41 €
1 Reel of 10 Metre(s)
Reel(s)
N 10m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS-stocknr. 611-8056
FabrikantRS PRO
85,37 €
1 Reel of 50 Metre(s)
Reel(s)
J 50m +260°C Unscreened 7/0.2mm PFA Multicore 7 - - - -
RS-stocknr. 611-8090
FabrikantRS PRO
125,11 €
1 Reel of 25 Metre(s)
Reel(s)
- 25m +260°C Screened 7/0.2mm PFA Multicore 7 - - - -
RS-stocknr. 827-5858
FabrikantRS PRO
44,48 €
Each
Aantal stuks
T 50m +350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS-stocknr. 611-7918
FabrikantRS PRO
104,77 €
1 Reel of 100 Metre(s)
Reel(s)
J 100m +105°C Screened 7/0.2mm Mylar Multicore 7 - - - -