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. 611-7996
BrandRS PRO
$36.40
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
$102.35
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. 433-4212
BrandRS PRO
$148.45
1 Reel of 25 Metre(s)
Reel(s)
S 1 25m -20°C +105°C Unscreened - PVC/Glass Fibre Single Core - 0.22 mm - - RoHS Compliant
RS Stock No. 768-6601
BrandRS PRO
$24.87
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. 762-1146
BrandRS PRO
$123.34
1 Reel of 100 Metre(s)
Reel(s)
T 2 25m -10°C +105°C Unscreened 7/0.2 mm PVC Twisted Pair 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 768-6591
BrandRS PRO
$23.58
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. 827-5915
BrandRS PRO
$168.93
Each
units
K 2 50m -40°C +200°C - 7/0.2 mm Silicone Rubber Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5750
BrandRS PRO
$81.17
Each
units
K 2 25m -75°C +260°C - 7/0.2 mm PFA Teflon Twin Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5867
BrandRS PRO
$198.73
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. 827-5934
BrandRS PRO
$96.90
Each
units
K 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. 827-6088
BrandRS PRO
$28.49
Each
units
U 2 10m -60°C +350°C - 7/0.2 mm Glass Fibre Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 150-010
BrandRS PRO
$23.91
1 Reel of 10 Metre(s)
Reel(s)
J 2 10m -10°C +105°C Unscreened 7/0.2 mm PVC Single Core 7 0.2 mm - - BS 1843-1952, RoHS Compliant
RS Stock No. 611-7980
BrandRS PRO
$151.65
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 768-6639
BrandRS PRO
$44.98
Each
units
K 2 10m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 768-6667
BrandRS PRO
$43.72
Each
units
N 2 10m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 827-5980
BrandRS PRO
$25.19
Each
units
J 2 25m -75°C +260°C - 1/0.2 mm PTFE Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 762-1140
BrandRS PRO
$59.45
1 Reel of 25 Metre(s)
Reel(s)
T 2 25m -10°C +105°C Screened 7/0.2 mm PVC Twisted Pair 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 768-6658
BrandRS PRO
$37.18
Each
units
N 2 5m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
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