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. 827-5912
BrandRS PRO
$26.48
Each
units
J 2 50m -75°C +260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
New
RS Stock No. 185-3018
BrandRS PRO
$12.98
Each
units
- - - - - - - - - - - - - -
RS Stock No. 827-5735
BrandRS PRO
$50.70
Each
units
T 2 10m -75°C +260°C - 7/0.2 mm PFA Teflon Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 407-1567
BrandRS PRO
$163.12
1 Reel of 20 Metre(s)
Reel(s)
K 1 20m -20°C +800°C Unscreened - Fibreglass Single Core - - - - AFNOR Class 2, NFC 42321-322/323, RoHS Compliant
RS Stock No. 768-6642
BrandRS PRO
$26.48
Each
units
T 2 5m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 611-7996
BrandRS PRO
$36.76
1 Reel of 25 Metre(s)
Reel(s)
N 2 25m -75°C +250°C Unscreened 1/0.2 mm PFA Twisted Pair 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6047
BrandRS PRO
$103.37
Each
units
K 2 50m -75°C +260°C - 1/0.315 mm PTFE Flat Pair 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 768-6610
BrandRS PRO
$29.40
Each
units
N 2 2m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 827-5902
BrandRS PRO
$52.95
Each
units
J 2 25m -40°C +200°C - 7/0.2 mm Silicone Rubber Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5741
BrandRS PRO
$159.38
Each
units
J 2 100m -75°C +260°C - 7/0.2 mm PFA Teflon Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5984
BrandRS PRO
$50.36
Each
units
J 2 50m -75°C +260°C - 1/0.2 mm PTFE Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 407-1545
BrandRS PRO
$93.29
1 Reel of 20 Metre(s)
Reel(s)
K 1 20m - +600°C Unscreened - Fibreglass Single Core - - - - AFNOR Class 2, NFC 42321-322/323
RS Stock No. 827-5612
BrandRS PRO
$145.87
Each
units
K 2 200m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 768-6601
BrandRS PRO
$25.12
Each
units
J 2 10m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 827-6022
BrandRS PRO
$56.19
Each
units
T 2 50m -75°C +260°C - 1/0.315 mm PTFE Twisted 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5707
BrandRS PRO
$71.38
Each
units
K 2 25m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 768-6645
BrandRS PRO
$43.29
Each
units
J 2 10m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 827-5681
BrandRS PRO
$123.12
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. 827-5779
BrandRS PRO
$12.68
Each
units
T 2 10m -75°C +260°C - 1/0.2 mm PFA Teflon Twin Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5656
BrandRS PRO
$18.17
Each
units
R/S 2 10m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
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