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 Length Maximum Operating Temperature Screened/Unscreened Core Strands Insulation Material Cable Shape Number of Strands American Wire Gauge Series Standards Met Voltage Rating
RS Stock No. 814-0106
BrandRS PRO
TWD653.00
Each
units
T 50m 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS Stock No. 814-0109
BrandRS PRO
TWD1,371.00
Each
units
T 100m 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS Stock No. 814-0096
BrandRS PRO
TWD318.00
Each
units
T 25m +260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS Stock No. 779-9713
BrandRS PRO
TWD794.00
Each
units
- - - - - - - - - - - -
RS Stock No. 407-1466
BrandRS PRO
TWD2,448.00
1 Reel of 25 Metre(s)
Reel(s)
RTD 25m +80°C Screened 7/0.2mm PVC Multicore 7 - - - -
RS Stock No. 219-4573
BrandRS PRO
TWD1,920.00
1 Reel of 100 Metre(s)
Reel(s)
K 100m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS Stock No. 407-1488
BrandRS PRO
TWD4,161.00
1 Reel of 25 Metre(s)
Reel(s)
K 25m +200°C Unscreened 7/0.2mm PTFE Single Core 7 - - RoHS Compliant -
RS Stock No. 151-209
BrandRS PRO
TWD423.00
1 Reel of 10 Metre(s)
Reel(s)
- - - - - - - - - - - -
RS Stock No. 219-4595
BrandRS PRO
TWD1,048.00
1 Reel of 10 Metre(s)
Reel(s)
K 10m +400°C Unscreened 7/0.2mm Fibreglass Multicore 7 - - - -
RS Stock No. 827-6047
BrandRS PRO
TWD4,892.00
Each
units
K 50m +260°C - 1/0.315mm PTFE Flat Pair 1 - - - -
RS Stock No. 236-3842
BrandRS PRO
TWD2,598.00
1 Reel of 25 Metre(s)
Reel(s)
K 25m +400°C Screened 7/0.2mm Fibreglass Multicore 7 - - - -
RS Stock No. 827-6066
BrandRS PRO
TWD1,037.00
Each
units
K 25m +350°C - 1/0.2mm Glass Fibre Flat Pair 1 - - - -
RS Stock No. 236-3820
BrandRS PRO
TWD897.00
1 Reel of 25 Metre(s)
Reel(s)
K 25m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS Stock No. 611-8040
BrandRS PRO
TWD3,116.00
1 Reel of 50 Metre(s)
Reel(s)
T 50m +260°C Unscreened 7/0.2mm PFA Multicore 7 - - - -
RS Stock No. 611-7889
BrandRS PRO
TWD3,949.00
1 Reel of 100 Metre(s)
Reel(s)
K 100m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS Stock No. 779-9716
BrandRS PRO
TWD982.00
Each
units
- - - - - - - - - - - -
RS Stock No. 827-5855
BrandRS PRO
TWD2,108.00
Each
units
J 50m +350°C - 7/0.2mm Glass Fibre Flat Pair 7 - - - -
RS Stock No. 814-0115
BrandRS PRO
TWD3,236.00
Each
units
- 200m 105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS Stock No. 607-8605
Mfr. Part No.909723/0001
BrandJumo
TWD2,565.00
Each
units
K 25m +180°C Unscreened - PTFE Multicore - - - - -
RS Stock No. 200-0627
BrandRS PRO
TWD3,265.00
Each
units
K 25m +250°C - - PFA Teflon - - - - - -