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. 814-0096
BrandRS PRO
kr 95,12
Each
Units
T - 25m - +260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS Stock No. 768-6620
BrandRS PRO
kr 343,77
Each
Units
K - 5m - +220°C - 7/0.2mm PVC Multicore 7 - - - IEC, RoHS Compliant
RS Stock No. 827-5700
BrandRS PRO
kr 663,10
Each
Units
K - 50m - +350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS Stock No. 779-9678
BrandRS PRO
kr 341,17
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 827-5921
BrandRS PRO
kr 287,34
Each
Units
J - 25m - +260°C - 1/0.508mm PFA Teflon Twisted 1 - - - -
RS Stock No. 236-3959
BrandRS PRO
kr 378,16
1 Reel of 25 Metre(s)
Reel(s)
K - 25m - +105°C Screened 7/0.2mm PVC Multicore 7 - - - -
RS Stock No. 814-0064
BrandRS PRO
kr 1 139,07
Each
Units
K - 100m - 350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS Stock No. 814-0106
BrandRS PRO
kr 183,45
Each
Units
T - 50m - 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS Stock No. 433-4199
BrandRS PRO
kr 1 833,98
1 Reel of 25 Metre(s)
Reel(s)
S - 25m - +250°C Unscreened 14/0.3mm Silicone Rubber Single Core 14 - - - RoHS Compliant
RS Stock No. 827-5634
BrandRS PRO
kr 491,92
Each
Units
K - 50m - +105°C - 13/0.2mm PVC Flat Pair 13 - - - -
RS Stock No. 827-5690
BrandRS PRO
kr 124,92
Each
Units
K - 10m - +105°C - 7/0.2mm PVC Twisted 7 - - - -
RS Stock No. 814-0080
BrandRS PRO
kr 105,98
Each
Units
T - 25m - +260°C - 1/0.3mm PFA Teflon Twisted 1 - - - -
RS Stock No. 814-0099
BrandRS PRO
kr 212,06
Each
Units
T - 50m - 260°C - 1/0.3mm PFA Teflon Twisted 1 - - - -
RS Stock No. 827-5817
BrandRS PRO
kr 151,15
Each
Units
T - 10m - +260°C - 1/0.2mm PTFE Twin Twisted 1 - - - -
RS Stock No. 814-0005
BrandRS PRO
kr 474,17
Each
Units
J - 100m - 105°C Unscreened 7/0.2mm PVC Flat Pair 7 - - Type J -
RS Stock No. 814-0052
BrandRS PRO
kr 282,75
Each
Units
K - 25m - +350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS Stock No. 814-0008
BrandRS PRO
kr 1 049,74
Each
Units
J - 200m - 105°C Unscreened 7/0.2mm PVC Flat Pair 7 - - - -
RS Stock No. 236-3858
BrandRS PRO
kr 1 054,43
1 Reel of 25 Metre(s)
Reel(s)
K - 25m - +250°C Unscreened 7/0.2mm PTFE Flat 7 - - - -
RS Stock No. 827-5671
BrandRS PRO
kr 722,13
Each
Units
K - 50m - +105°C Screened 7/0.2mm PVC Twisted 7 - - - -
RS Stock No. 492-9753
BrandRS PRO
kr 226,82
Each
Units
RTD - 10m - +105°C Screened 7/0.2mm PVC Multicore 7 - - - -