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. 236-3921
BrandRS PRO
£25.20
1 Reel of 25 Metre(s)
Reel(s)
J 2 25m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 407-1444
BrandRS PRO
£127.45
1 Reel of 25 Metre(s)
Reel(s)
RTD 3 25m -10°C +80°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - -
RS Stock No. 611-8129
BrandRS PRO
£70.88
1 Reel of 50 Metre(s)
Reel(s)
- 4 50m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 151-209
BrandRS PRO
£9.66
1 Reel of 10 Metre(s)
Reel(s)
K 1 10m -75°C +480°C Unscreened 1/0.3 mm Fibreglass Single Core 1 0.3 mm - - -
RS Stock No. 611-7980
BrandRS PRO
£46.46
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 827-5823
BrandRS PRO
£45.48
Each
Units
RTD 4 10m -40°C +200°C - 7/0.2 mm Silicone Rubber Twisted 7 0.2 mm - - -
RS Stock No. 151-316
BrandRS PRO
£11.37
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m 0°C +80°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 236-3858
BrandRS PRO
£78.23
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -75°C +250°C Unscreened 7/0.2 mm PTFE Flat 7 0.2 mm - - -
RS Stock No. 611-7924
BrandRS PRO
£84.00
1 Reel of 100 Metre(s)
Reel(s)
VX 2 100m -10°C +105°C Screened 7/0.2 mm Mylar Multicore 7 0.2 mm - - -
RS Stock No. 611-7918
BrandRS PRO
£85.05
1 Reel of 100 Metre(s)
Reel(s)
J 2 100m -10°C +105°C Screened 7/0.2 mm Mylar Multicore 7 0.2 mm - - -
RS Stock No. 611-8040
BrandRS PRO
£69.30
1 Reel of 50 Metre(s)
Reel(s)
T 2 50m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - -
RS Stock No. 219-4589
BrandRS PRO
£14.81
1 Reel of 10 Metre(s)
Reel(s)
K 2 10m -60°C +400°C Unscreened 1/0.315 mm Fibreglass Multicore 1 0.315 mm - - -
RS Stock No. 611-7968
BrandRS PRO
£30.98
1 Reel of 50 Metre(s)
Reel(s)
K 2 50m -75°C +260°C Unscreened 1/0.2 mm PFA Multicore 1 0.2 mm - - -
RS Stock No. 407-1466
BrandRS PRO
£58.61
1 Reel of 25 Metre(s)
Reel(s)
RTD 3 25m -10°C +80°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 219-4595
BrandRS PRO
£23.42
1 Reel of 10 Metre(s)
Reel(s)
K 2 10m -60°C +400°C Unscreened 7/0.2 mm Fibreglass Multicore 7 0.2 mm - - -
RS Stock No. 611-7902
BrandRS PRO
£16.80
1 Reel of 25 Metre(s)
Reel(s)
U 2 25m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 407-1523
BrandRS PRO
£4.912
Each
Units
K 1 20m - +250°C Unscreened - Kapton Single Core - 0.25 mm - - -
RS Stock No. 492-9753
BrandRS PRO
£18.50
Each
Units
RTD 4 10m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 219-4753
BrandRS PRO
£7.25
1 Reel of 10 Metre(s)
Reel(s)
J 2 10m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
RS Stock No. 363-0418
BrandRS PRO
£46.81
Each
Units
T 1 25m -75°C +250°C Unscreened 1/0.315 mm PTFE Flat Pair 1 0.315 mm - - -
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