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. 827-5798
BrandRS PRO
HK$292.20
Each
units
J 2 10m -75°C +260°C - 1/0.3 mm PTFE Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5801
BrandRS PRO
HK$146.10
Each
units
K 2 10m -75°C +260°C - 1/0.2 mm PTFE Twin Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5833
BrandRS PRO
HK$532.50
Each
units
K 2 50m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - IEC 751, RoHS Compliant
RS Stock No. 827-5805
BrandRS PRO
HK$531.81
Each
units
K 2 50m -75°C +260°C - 1/0.2 mm PTFE Twin Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 455-4236
BrandRS PRO
HK$373.75
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
RS Stock No. 827-5615
BrandRS PRO
HK$130.24
Each
units
K 2 10m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 407-1567
BrandRS PRO
HK$889.69
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. 827-5996
BrandRS PRO
HK$479.35
Each
units
J 2 50m -75°C +260°C - 1/0.315 mm PTFE Twisted 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5836
BrandRS PRO
HK$3,571.50
Each
units
RTD 4 100m -75°C +260°C Screened 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - IEC 751, RoHS Compliant
RS Stock No. 827-5716
BrandRS PRO
HK$243.54
Each
units
K 2 10m -75°C +260°C - 7/0.2 mm PFA Teflon Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5697
BrandRS PRO
HK$1,623.44
Each
units
K 2 200m -10°C +105°C - 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5906
BrandRS PRO
HK$613.67
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. 407-1573
BrandRS PRO
HK$2,053.41
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. 827-5808
BrandRS PRO
HK$1,331.20
Each
units
J 2 50m -75°C +260°C - 7/0.2 mm PTFE Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5726
BrandRS PRO
HK$1,071.44
Each
units
K 2 100m -75°C +260°C - 1/0.3 mm PFA Teflon Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 455-4242
BrandRS PRO
HK$939.27
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. 827-6019
BrandRS PRO
HK$396.65
Each
units
K 2 50m -75°C +260°C - 1/0.315 mm PTFE Twisted 1 0.315 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5609
BrandRS PRO
HK$79.58
Each
units
K 2 10m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5722
BrandRS PRO
HK$600.67
Each
units
T 2 50m -75°C +260°C - 1/0.3 mm PFA Teflon Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6088
BrandRS PRO
HK$187.62
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