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. 158-963
BrandRS PRO
R 1,134.57
1 Reel of 100 Metre(s)
Reel(s)
- - - - - - - - - - - -
RS stock no. 779-9713
BrandRS PRO
R 417.42
Each
units
- - - - - - - - - - - -
RS stock no. 827-5823
BrandRS PRO
R 1,043.08
Each
units
RTD 10m +200°C - 7/0.2mm Silicone Rubber Twisted 7 - - - -
RS stock no. 219-4573
BrandRS PRO
R 1,287.26
1 Reel of 100 Metre(s)
Reel(s)
K 100m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS stock no. 814-0086
BrandRS PRO
R 2,183.99
Each
units
T 200m 105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS stock no. 363-0389
BrandRS PRO
R 711.75
Each
units
K 25m +250°C Unscreened 1/0.2mm PTFE Twin Twisted 1 - - - -
RS stock no. 779-9710
BrandRS PRO
R 602.19
Each
units
- - - - - - - - - - - -
RS stock no. 814-0083
BrandRS PRO
R 1,170.10
Each
units
T 100m 105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS stock no. 814-0074
BrandRS PRO
R 327.48
Each
units
T 25m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -
RS stock no. 768-6594
BrandRS PRO
R 686.33
Each
units
K 10m +220°C - 7/0.2mm PVC Multicore 7 - - IEC, RoHS Compliant -
RS stock no. 407-1466
BrandRS PRO
R 1,319.28
1 Reel of 25 Metre(s)
Reel(s)
RTD 25m +80°C Screened 7/0.2mm PVC Multicore 7 - - - -
RS stock no. 611-7918
BrandRS PRO
R 2,217.39
1 Reel of 100 Metre(s)
Reel(s)
J 100m +105°C Screened 7/0.2mm Mylar Multicore 7 - - - -
RS stock no. 814-0030
BrandRS PRO
R 218.66
Each
units
K 25m +260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS stock no. 814-0042
BrandRS PRO
R 864.16
Each
units
K 100m 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS stock no. 219-4769
BrandRS PRO
R 228.79
1 Reel of 10 Metre(s)
Reel(s)
R/S 10m +105°C Unscreened 13/0.2mm PVC Multicore 13 - - - -
RS stock no. 814-0064
BrandRS PRO
R 1,927.80
Each
units
K 100m 350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS stock no. 814-0049
BrandRS PRO
R 422.42
Each
units
K 50m 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS stock no. 814-0052
BrandRS PRO
R 489.76
Each
units
K 25m +350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS stock no. 814-0061
BrandRS PRO
R 1,048.65
Each
units
K 50m 350°C - 1/0.3mm Glass Fibre Flat Pair 1 - - - -
RS stock no. 827-5662
BrandRS PRO
R 2,717.76
Each
units
T 200m +105°C - 7/0.2mm PVC Flat Pair 7 - - - -