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 Priced to Clear Series
RS Stock No. 762-1152
BrandRS PRO
£92.40
1 Reel of 100 Metre(s)
Reel(s)
K 2 25m -10°C +105°C Unscreened 13/0.2 mm PVC Twisted Pair 13 0.2 mm - - -
RS Stock No. 814-0109
BrandRS PRO
£27.68
Each
Units
T 2 100m -75°C 260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - -
RS Stock No. 814-0096
BrandRS PRO
£6.85
Each
Units
T 2 25m -75°C +260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - -
RS Stock No. 290-4976
BrandRS PRO
£196.37
Each
Units
RTD 4 25m -75°C +260°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - -
RS Stock No. 768-6594
BrandRS PRO
£29.41
Each
Units
K 2 10m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 455-4236
BrandRS PRO
£56.83
Each
Units
Duplex T 4 25m -50°C +200°C Unscreened 7/0.2 mm Silicone Multicore 7 0.2 mm - - -
RS Stock No. 827-5839
BrandRS PRO
£340.61
Each
Units
RTD 6 50m -75°C +260°C Screened 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - -
RS Stock No. 433-4212
BrandRS PRO
£68.84
1 Reel of 25 Metre(s)
Reel(s)
S 1 25m -20°C +105°C Unscreened - PVC/Glass Fibre Single Core - 0.22 mm - - -
RS Stock No. 827-5592
BrandRS PRO
£15.16
Each
Units
J 2 25m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - -
RS Stock No. 827-5763
BrandRS PRO
£10.02
Each
Units
K 2 10m -75°C +260°C - 1/0.2 mm PFA Teflon Twin Twisted 1 0.2 mm - - -
RS Stock No. 768-6597
BrandRS PRO
£13.42
Each
Units
J 2 2m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 827-5845
BrandRS PRO
£186.48
Each
Units
K 2 200m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - -
RS Stock No. 768-6608
BrandRS PRO
£16.81
Each
Units
T 2 5m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 827-5902
BrandRS PRO
£37.97
Each
Units
J 2 25m -40°C +200°C - 7/0.2 mm Silicone Rubber Twisted 7 0.2 mm - - -
RS Stock No. 827-5726
BrandRS PRO
£114.62
Each
Units
K 2 100m -75°C +260°C - 1/0.3 mm PFA Teflon Flat Pair 1 0.3 mm - - -
RS Stock No. 611-8028
BrandRS PRO
£36.23
1 Reel of 25 Metre(s)
Reel(s)
T 2 25m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 611-8062
BrandRS PRO
£66.94
1 Reel of 25 Metre(s)
Reel(s)
N 2 25m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 827-5827
BrandRS PRO
£186.73
Each
Units
RTD 4 50m -75°C +260°C Screened 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - -
RS Stock No. 827-5637
BrandRS PRO
£28.04
Each
Units
N 2 25m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - -
RS Stock No. 827-6056
BrandRS PRO
£6.13
Each
Units
K - 2m -25°C +125°C - - Polyurethane Curly - - - - -
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