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. 290-4954
BrandRS PRO
£40.18
Each
Units
RTD 4 25m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 492-9775
BrandRS PRO
£77.50
Each
Units
- 4 10m -75°C +260°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - -
RS Stock No. 827-5609
BrandRS PRO
£8.48
Each
Units
K 2 10m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - -
RS Stock No. 611-8034
BrandRS PRO
£36.23
1 Reel of 25 Metre(s)
Reel(s)
J 2 25m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 455-4264
BrandRS PRO
£25.20
1 Reel of 25 Metre(s)
Reel(s)
J 2 25m -60°C +400°C Unscreened 7/0.2 mm Fibreglass Multicore 7 0.2 mm - - -
RS Stock No. 611-8056
BrandRS PRO
£69.30
1 Reel of 50 Metre(s)
Reel(s)
J 2 50m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 455-4258
BrandRS PRO
£65.66
1 Reel of 25 Metre(s)
Reel(s)
J 2 25m -75°C +250°C Unscreened 7/0.2 mm PTFE Single Core 7 0.2 mm - - -
RS Stock No. 455-4242
BrandRS PRO
£100.53
Each
Units
RTD 4 25m -50°C +200°C Unscreened 7/0.2 mm Silicone Multicore 7 0.2 mm - - -
RS Stock No. 363-0402
BrandRS PRO
£20.04
Each
Units
T 2 25m -75°C +250°C Unscreened 1/0.2 mm PTFE Single Core 1 0.2 mm - - -
RS Stock No. 611-7930
BrandRS PRO
£126.00
1 Reel of 50 Metre(s)
Reel(s)
K 2 50m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 158-979
BrandRS PRO
£40.61
1 Reel of 10 Metre(s)
Reel(s)
K 2 10m - - Unscreened 7/0.2 mm Fibreglass Single Core 7 0.2 mm - - -
RS Stock No. 827-5974
BrandRS PRO
£38.69
Each
Units
T 2 50m -75°C +260°C - 1/0.3 mm PFA Teflon Flat Pair 1 0.3 mm - - -
RS Stock No. 433-4199
BrandRS PRO
£6.289
Each
Units
S 1 25m - +250°C Unscreened 14/0.3 mm Silicone Rubber Single Core 14 0.3 mm - - -
RS Stock No. 219-4703
BrandRS PRO
£9.35
1 Reel of 10 Metre(s)
Reel(s)
T 2 10m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 611-8090
BrandRS PRO
£113.66
1 Reel of 25 Metre(s)
Reel(s)
- 4 25m -75°C +260°C Screened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 827-5716
BrandRS PRO
£24.23
Each
Units
K 2 10m -75°C +260°C - 7/0.2 mm PFA Teflon Flat Pair 7 0.2 mm - - -
RS Stock No. 407-1573
BrandRS PRO
£266.43
1 Reel of 20 Metre(s)
Reel(s)
K 1 20m - +1200°C Unscreened - Ceramic Fibre Single Core - - - - -
RS Stock No. 236-3870
BrandRS PRO
£14.96
1 Reel of 25 Metre(s)
Reel(s)
T 2 25m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 611-7952
BrandRS PRO
£50.40
1 Reel of 100 Metre(s)
Reel(s)
T 2 100m -75°C +260°C Unscreened 1/0.2 mm PFA Multicore 1 0.2 mm - - -
RS Stock No. 219-4668
BrandRS PRO
£12.50
1 Reel of 10 Metre(s)
Reel(s)
N 2 10m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
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