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 Series Standards Met
RS Stock No. 185-3005
BrandRS PRO
£80.35
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 185-3011
BrandRS PRO
£5.01
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 185-3008
BrandRS PRO
£124.85
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 827-5899
BrandRS PRO
£21.64
Each
Units
T 2 25m -10°C +105°C - 13/0.2 mm PVC Flat Pair 13 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 185-3014
BrandRS PRO
£16.24
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 185-3019
BrandRS PRO
£7.18
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 178-0950
BrandRS PRO
£7.44
Each
Units
J 1 10m -75°C +260°C Screened 1/0.3 mm PFA Twin Twisted 1 0.3 mm - - -
RS Stock No. 185-3004
BrandRS PRO
£93.96
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 827-5959
BrandRS PRO
£38.34
Each
Units
T 2 50m -75°C +260°C - 1/0.508 mm PFA Teflon Twisted 1 0.508 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 185-3018
BrandRS PRO
£5.93
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 827-6034
BrandRS PRO
£80.98
Each
Units
N 2 25m -75°C +260°C - 7/0.2 mm PTFE Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 185-3017
BrandRS PRO
£31.70
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 827-5681
BrandRS PRO
£153.35
Each
Units
T 2 200m -10°C +105°C - 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 185-3016
BrandRS PRO
£13.23
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 410-6629
Mfr. Part No.R17-1105.1
BrandReckmann
£95.18
Each
Units
K 2 50m - +180°C Unscreened - Silicone Twisted Pair - - - - -
RS Stock No. 410-6584
Mfr. Part No.R17-1102.1
BrandReckmann
£59.55
Each
Units
K 2 50m - +70°C Unscreened - PVC Twisted Pair - - - - -
RS Stock No. 607-8712
Mfr. Part No.909723/0001
BrandJumo
£43.49
Each
Units
L 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8728
Mfr. Part No.909723/0001
BrandJumo
£57.50
Each
Units
L 2 25m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8683
Mfr. Part No.909723/0001
BrandJumo
£144.98
Each
Units
J 2 25m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8655
Mfr. Part No.909723/0001
BrandJumo
£55.08
Each
Units
J 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
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