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. 827-5707
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. 827-5791
BrandRS PRO
$37.86
Each
units
T 2 10m -75°C +260°C - 1/0.3 mm PTFE Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5606
BrandRS PRO
$128.26
Each
units
J 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. 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. 827-5757
BrandRS PRO
$42.04
Each
units
K 2 10m -75°C +260°C - 7/0.2 mm PFA Teflon Twin Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 370-6199
BrandRS PRO
$83.24
1 Reel of 25 Metre(s)
Reel(s)
K 1 25m -10°C +105°C Screened - PVC Single Core - - - - RoHS Compliant
RS Stock No. 827-5713
BrandRS PRO
$173.41
Each
units
K 2 50m -60°C +350°C - 7/0.2 mm Glass Fibre Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 410-6613
Mfr. Part No.R17-1104.1
BrandReckmann
$149.73
Each
units
L 2 50m - +180°C Unscreened - Silicone Twisted Pair - - - - -
RS Stock No. 827-5640
BrandRS PRO
$185.08
Each
units
N 2 100m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5697
BrandRS PRO
$238.55
Each
units
K 2 200m -10°C +105°C - 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5968
BrandRS PRO
$65.01
Each
units
K 2 25m -75°C +260°C - 1/0.508 mm PFA Teflon Flat Pair 1 0.508 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5662
BrandRS PRO
$131.77
Each
units
T 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. 827-5883
BrandRS PRO
$47.07
Each
units
K 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. 814-0055
BrandRS PRO
$93.88
Each
units
K 2 50m -75°C 260°C - 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 827-5653
BrandRS PRO
$36.09
Each
units
T 2 50m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5592
BrandRS PRO
$29.21
Each
units
J 2 25m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6000
BrandRS PRO
$31.77
Each
units
K 2 25m -75°C +260°C - 1/0.315 mm PTFE Twisted 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6038
BrandRS PRO
$54.19
Each
units
K 2 25m -75°C +260°C - 1/0.315 mm PTFE Flat Pair 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 768-6636
BrandRS PRO
$33.41
Each
units
J 2 5m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 827-5940
BrandRS PRO
$23.30
Each
units
T 2 25m -75°C +260°C - 1/0.508 mm PFA Teflon Twisted 1 0.508 mm - - IEC 584-3, RoHS Compliant
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