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. 827-6056
BrandRS PRO
£6.13
Each
Units
K - 2m -25°C +125°C - - Polyurethane Curly - - - - -
RS Stock No. 827-5836
BrandRS PRO
£332.50
Each
Units
RTD 4 100m -75°C +260°C Screened 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - -
RS Stock No. 814-0002
BrandRS PRO
£17.14
Each
Units
J 2 25m -10°C +105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - -
RS Stock No. 814-0014
BrandRS PRO
£126.86
Each
Units
J 2 200m -10°C 105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - -
RS Stock No. 814-0011
BrandRS PRO
£71.37
Each
Units
J 2 100m -10°C 105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - -
RS Stock No. 814-0049
BrandRS PRO
£17.14
Each
Units
K 2 50m -75°C 260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - -
RS Stock No. 814-0042
BrandRS PRO
£35.68
Each
Units
K 2 100m -75°C 260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - -
RS Stock No. 827-5643
BrandRS PRO
£24.24
Each
Units
R/S 2 25m -10°C +105°C - 13/0.2 mm PVC Flat Pair 13 0.2 mm - - -
RS Stock No. 814-0030
BrandRS PRO
£8.57
Each
Units
K 2 25m -75°C +260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - -
RS Stock No. 827-5665
BrandRS PRO
£14.90
Each
Units
J 2 10m -10°C +105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - -
RS Stock No. 407-1450
BrandRS PRO
£165.59
1 Reel of 25 Metre(s)
Reel(s)
RTD 4 25m -10°C +80°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - -
RS Stock No. 370-6199
BrandRS PRO
£60.47
1 Reel of 25 Metre(s)
Reel(s)
K 1 25m -10°C +105°C Screened - PVC Single Core - - - - -
RS Stock No. 827-6000
BrandRS PRO
£33.74
Each
Units
K 2 25m -75°C +260°C - 1/0.315 mm PTFE Twisted 1 0.315 mm - - -
RS Stock No. 407-1488
BrandRS PRO
£98.61
1 Reel of 25 Metre(s)
Reel(s)
K 1 25m - +200°C Unscreened 7/0.2 mm PTFE Single Core 7 0.2 mm - - -
RS Stock No. 827-5678
BrandRS PRO
£15.87
Each
Units
K 2 10m -10°C +105°C - 7/0.2 mm PVC Twisted 7 0.2 mm - - -
RS Stock No. 827-5849
BrandRS PRO
£21.68
Each
Units
T 2 25m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - -
RS Stock No. 236-3909
BrandRS PRO
£7.98
1 Reel of 10 Metre(s)
Reel(s)
T 2 10m -60°C +400°C Unscreened 1/0.315 mm Fibreglass Multicore 1 0.315 mm - - -
RS Stock No. 370-6206
BrandRS PRO
£50.24
1 Reel of 25 Metre(s)
Reel(s)
J 1 25m -10°C +105°C Unscreened - PVC Single Core - - - - -
RS Stock No. 827-6050
BrandRS PRO
£8.00
Each
Units
T - 2m -25°C +125°C - - Polyurethane Curly - - - - -
RS Stock No. 827-5798
BrandRS PRO
£26.93
Each
Units
J 2 10m -75°C +260°C - 1/0.3 mm PTFE Flat Pair 1 0.3 mm - - -
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