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. 363-0389
BrandRS PRO
MYR113.45
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. 768-6585
BrandRS PRO
MYR98.26
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. 236-3836
BrandRS PRO
MYR236.36
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. 151-209
BrandRS PRO
MYR70.11
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. 611-7946
BrandRS PRO
MYR261.25
1 Reel of 100 Metre(s)
Reel(s)
K 2 100m -75°C +260°C Unscreened 1/0.2 mm PFA Multicore 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 363-0418
BrandRS PRO
MYR263.29
Each
units
T 1 25m -75°C +250°C Unscreened 1/0.315 mm PTFE Flat Pair 1 0.315 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 492-9753
BrandRS PRO
MYR105.97
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. 236-3820
BrandRS PRO
MYR267.80
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. 611-7889
BrandRS PRO
MYR470.95
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. 219-4589
BrandRS PRO
MYR50.60
1 Reel of 10 Metre(s)
Reel(s)
K 2 10m -60°C +400°C Unscreened 1/0.315 mm Fibreglass Multicore 1 0.315 mm - - BS 1843, RoHS Compliant
RS Stock No. 814-0099
BrandRS PRO
MYR87.05
Each
units
T 2 50m -75°C 260°C - 1/0.3 mm PFA Teflon Twisted 1 0.3 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0092
BrandRS PRO
MYR189.72
Each
units
T 2 100m -75°C 260°C - 1/0.3 mm PFA Teflon Twisted 1 0.3 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0080
BrandRS PRO
MYR45.00
Each
units
T 2 25m -75°C +260°C - 1/0.3 mm PFA Teflon Twisted 1 0.3 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 702-7967
Mfr. Part No.34307A
MYR536.87
Each
units
J 2 1.8m - - - - Teflon - - - - - -
RS Stock No. 236-3937
BrandRS PRO
MYR381.04
1 Reel of 25 Metre(s)
Reel(s)
J 2 25m -60°C +400°C Screened 7/0.2 mm Fibreglass Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
RS Stock No. 407-1573
BrandRS PRO
MYR1,284.96
1 Reel of 20 Metre(s)
Reel(s)
K 1 20m - +1200°C Unscreened - Ceramic Fibre Single Core - - - - AFNOR Class 2, NFC 42321-322/323, RoHS Compliant
RS Stock No. 290-4976
BrandRS PRO
MYR1,053.50
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. 827-5707
BrandRS PRO
MYR129.64
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. 827-5823
BrandRS PRO
MYR221.19
Each
units
RTD 4 10m -40°C +200°C - 7/0.2 mm Silicone Rubber Twisted 7 0.2 mm - - IEC 751, RoHS Compliant
RS Stock No. 827-6075
BrandRS PRO
MYR131.42
Each
units
K 2 25m -60°C +350°C - 1/0.508 mm Glass Fibre Flat Pair 1 0.508 mm - - IEC 584-3, RoHS Compliant
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