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. 236-3842
BrandRS PRO
SGD91.31
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -60°C +400°C Screened 7/0.2 mm Fibreglass Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 236-3836
BrandRS PRO
SGD77.27
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -60°C +400°C Unscreened 1/0.315 mm Fibreglass Multicore 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 236-3820
BrandRS PRO
SGD39.98
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 363-0389
BrandRS PRO
SGD59.38
Each
units
K 1 25m -75°C +250°C Unscreened 1/0.2 mm PTFE Twin Twisted 1 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 827-6047
BrandRS PRO
SGD111.17
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. 611-7895
BrandRS PRO
SGD241.09
1 Reel of 100 Metre(s)
Reel(s)
K 2 100m -10°C +105°C Screened 7/0.2 mm Mylar Multicore 7 0.2 mm 24 AWG - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 492-9753
BrandRS PRO
SGD29.59
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. 236-3959
BrandRS PRO
SGD41.22
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. 768-6585
BrandRS PRO
SGD42.40
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. 219-4551
BrandRS PRO
SGD31.04
1 Reel of 25 Metre(s)
Reel(s)
K 2 25m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - BS 1843, RoHS Compliant
RS Stock No. 814-0070
BrandRS PRO
SGD432.60
Each
units
K 2 200m -10°C 105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0068
BrandRS PRO
SGD56.97
Each
units
K 2 25m -10°C +105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0077
BrandRS PRO
SGD229.31
Each
units
K 2 100m -10°C 105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 611-7924
BrandRS PRO
SGD168.33
1 Reel of 100 Metre(s)
Reel(s)
VX 2 100m -10°C +105°C Screened 7/0.2 mm Mylar Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6066
BrandRS PRO
SGD24.47
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. 236-3864
BrandRS PRO
SGD65.51
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. 611-7889
BrandRS PRO
SGD179.99
1 Reel of 100 Metre(s)
Reel(s)
K 2 100m -10°C +105°C Unscreened 7/0.2 mm PVC Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 407-1567
BrandRS PRO
SGD187.26
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. 151-209
BrandRS PRO
SGD19.26
1 Reel of 10 Metre(s)
Reel(s)
K 1 10m -75°C +480°C Unscreened 1/0.3 mm Fibreglass Single Core 1 0.3 mm - - BS 1843, RoHS Compliant
RS Stock No. 611-7980
BrandRS PRO
SGD92.76
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
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