Thermocouple & Extension Wire

Thermocouple extension wire is a hardwearing type of wire used for connecting a thermocouple probe to a readout instrument. Thermocouples are sensors that measure temperature across a wide range of applications in most industrial environments.

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. Thermocouple grade wire is used to make the sensing point of the thermocouple. Extension wire has a lower ambient temperature limit and can't be used in a thermocouple's sensing point.


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Description Price Thermocouple Type Number of Cores Length Minimum Operating Temperature Maximum Operating Temperature Screened/Unscreened Core Strands Insulation Material Cable Shape Number of Strands Size of Strands American Wire Gauge Series Standards Met
RS Stock No. 607-8627
Mfr. Part No.909723/0001
BrandJumo
£59.20
Each
Units
K 2 25m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8699
Mfr. Part No.909723/0001
BrandJumo
£44.80
Each
Units
L 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8633
Mfr. Part No.909723/0001
BrandJumo
£54.15
Each
Units
K 4 10m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8762
Mfr. Part No.909723/0001
BrandJumo
£66.79
Each
Units
L 2 25m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8554
Mfr. Part No.909723/0001
BrandJumo
£50.30
Each
Units
K 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8576
Mfr. Part No.909723/0001
BrandJumo
£73.42
Each
Units
K 4 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8706
Mfr. Part No.909723/0001
BrandJumo
£70.70
Each
Units
L 2 25m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8677
Mfr. Part No.909723/0001
BrandJumo
£69.69
Each
Units
J 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8649
Mfr. Part No.909723/0001
BrandJumo
£108.51
Each
Units
K 4 25m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8611
Mfr. Part No.909723/0001
BrandJumo
£30.60
Each
Units
K 2 10m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8560
Mfr. Part No.909723/0001
BrandJumo
£83.06
Each
Units
K 2 25m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8605
Mfr. Part No.909723/0001
BrandJumo
£56.66
Each
Units
K 2 25m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8598
Mfr. Part No.909723/0001
BrandJumo
£31.52
Each
Units
K 2 10m -50°C +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 607-8582
Mfr. Part No.909723/0001
BrandJumo
£160.88
Each
Units
K 4 25m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 702-7967
Mfr. Part No.34307A
£90.22
Each
Units
J 2 1.8m - - - - Teflon - - - - - -
RS Stock No. 410-6607
Mfr. Part No.R17-1102.2
BrandReckmann
£60.12
Each
Units
N 2 50m - +70°C Unscreened - PVC Twisted Pair - - - - -
RS Stock No. 410-6613
Mfr. Part No.R17-1104.1
BrandReckmann
£96.96
Each
Units
L 2 50m - +180°C Unscreened - Silicone Twisted Pair - - - - -
RS Stock No. 410-6578
Mfr. Part No.R17-1101.1
BrandReckmann
£60.12
Each
Units
L 2 50m - +70°C Unscreened - PVC Twisted Pair - - - - -
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