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. 827-5700
BrandRS PRO
$133.00
Each
units
K 2 50m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 814-0049
BrandRS PRO
$29.91
Each
units
K 2 50m -75°C 260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0042
BrandRS PRO
$48.84
Each
units
K 2 100m -75°C 260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 219-4595
BrandRS PRO
$220.00
1 Reel of 10 Metre(s)
Reel(s)
K 2 10m -60°C +400°C Unscreened 7/0.2 mm Fibreglass Multicore 7 0.2 mm - - BS 1843, RoHS Compliant
RS Stock No. 492-9753
BrandRS PRO
$50.86
Each
units
RTD 4 10m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC 751, RoHS Compliant
RS Stock No. 219-4769
BrandRS PRO
$21.37
1 Reel of 10 Metre(s)
Reel(s)
R/S 2 10m -10°C +105°C Unscreened 13/0.2 mm PVC Multicore 13 0.2 mm - - BS 1843, RoHS Compliant
RS Stock No. 814-0030
BrandRS PRO
$16.98
Each
units
K 2 25m -75°C +260°C - 1/0.2 mm PFA Teflon Twisted 1 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 827-5729
BrandRS PRO
$39.72
Each
units
K 2 10m -75°C +260°C - 1/0.3 mm PFA Teflon Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 236-3864
BrandRS PRO
$109.25
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 611-7968
BrandRS PRO
$64.05
1 Reel of 50 Metre(s)
Reel(s)
K 2 50m -75°C +260°C Unscreened 1/0.2 mm PFA Multicore 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 290-4954
BrandRS PRO
$121.51
Each
units
RTD 4 25m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 827-5827
BrandRS PRO
$479.81
Each
units
RTD 4 50m -75°C +260°C Screened 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - IEC 751, RoHS Compliant
RS Stock No. 814-0018
BrandRS PRO
$44.67
Each
units
K 2 25m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0020
BrandRS PRO
$402.81
Each
units
K 2 200m -10°C 105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 433-4155
BrandRS PRO
$74.35
1 Reel of 20 Metre(s)
Reel(s)
T 1 20m -50°C +600°C Unscreened - Glass Fibre Single Core - - - - AFNOR Class 2, NFC 42321-322/323
RS Stock No. 236-3909
BrandRS PRO
$20.95
1 Reel of 10 Metre(s)
Reel(s)
T 2 10m -60°C +400°C Unscreened 1/0.315 mm Fibreglass Multicore 1 0.315 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 407-1523
BrandRS PRO
$6.324
Each
units
K 1 20m - +250°C Unscreened - Kapton Single Core - 0.25 mm - - RoHS Compliant
RS Stock No. 407-1551
BrandRS PRO
$77.54
1 Reel of 20 Metre(s)
Reel(s)
J 1 20m - +600°C Unscreened - Glass Fibre Single Core - - - - AFNOR Class 2, NFC 42321-322/323, RoHS Compliant
RS Stock No. 455-4242
BrandRS PRO
$257.47
Each
units
RTD 4 25m -50°C +200°C Unscreened 7/0.2 mm Silicone Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 455-4236
BrandRS PRO
$73.22
Each
units
Duplex T 4 25m -50°C +200°C Unscreened 7/0.2 mm Silicone Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
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