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. 455-4264
BrandRS PRO
$41.42
1 Reel of 25 Metre(s)
Reel(s)
J 2 25m -60°C +400°C Unscreened 7/0.2 mm Fibreglass Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 607-8699
Mfr. Part No.909723/0001
BrandJumo
$100.15
Each
units
L 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 151-316
BrandRS PRO
$51.13
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m 0°C +80°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - BS 1843-1952, RoHS Compliant
RS Stock No. 290-4976
BrandRS PRO
$320.79
Each
units
RTD 4 25m -75°C +260°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 607-8655
Mfr. Part No.909723/0001
BrandJumo
$96.17
Each
units
J 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 607-8576
Mfr. Part No.909723/0001
BrandJumo
$116.20
Each
units
K 4 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 611-8034
BrandRS PRO
$96.76
1 Reel of 25 Metre(s)
Reel(s)
J 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. 607-8554
Mfr. Part No.909723/0001
BrandJumo
$97.54
Each
units
K 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 407-1444
BrandRS PRO
$210.28
1 Reel of 25 Metre(s)
Reel(s)
RTD 3 25m -10°C +80°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - -
RS Stock No. 607-8677
Mfr. Part No.909723/0001
BrandJumo
$112.49
Each
units
J 2 10m -20°C +350°C Unscreened - Fibreglass Multicore - - - - -
RS Stock No. 611-8129
BrandRS PRO
$185.49
1 Reel of 50 Metre(s)
Reel(s)
- 4 50m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC 751, RoHS Compliant
RS Stock No. 827-6062
BrandRS PRO
$20.31
Each
units
J 2 25m -60°C +350°C - 1/0.315 mm Glass Fibre Flat Pair 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 768-6581
BrandRS PRO
$57.62
Each
units
K 2 2m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 611-8040
BrandRS PRO
$113.68
1 Reel of 50 Metre(s)
Reel(s)
T 2 50m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5956
BrandRS PRO
$66.10
Each
units
J 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. 407-1450
BrandRS PRO
$240.01
1 Reel of 25 Metre(s)
Reel(s)
RTD 4 25m -10°C +80°C Screened 7/0.2 mm PTFE Multicore 7 0.2 mm - - -
RS Stock No. 827-5906
BrandRS PRO
$77.33
Each
units
K 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. 768-6585
BrandRS PRO
$40.17
Each
units
K 2 5m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
RS Stock No. 827-6066
BrandRS PRO
$29.57
Each
units
K 2 25m -60°C +350°C - 1/0.2 mm Glass Fibre Flat Pair 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5763
BrandRS PRO
$24.01
Each
units
K 2 10m -75°C +260°C - 1/0.2 mm PFA Teflon Twin Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
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