Thermocouple & Extension Wire

Thermocouples are sensors that measure temperature across a wide range of applications in most industrial environments, and thermocouple extension wires used to create a hardwearing connection between the thermocouple probe to a readout instrument. These extension wires are used to extend a thermocouple signal back to the instrument and cannot be used in a thermocouple probe. At RS Components, we have a curated range of thermocouple extension wires suitable for J, K, L, N, R/S, RTD, S and T thermocouples from leading brands in the industry, including Jumo, Keysight Technologies, Reckmann and our own RS PRO.

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 and cannot be used as part of the probe itself. Thermocouple grade wire is used instead to make the sensing point of the thermocouple, as extension wire has a lower ambient temperature limit, which means may return a signal representing higher temperature readings than those that would be returned by a proper thermocouple probe, and therefore extension wire can't be used in a thermocouple's sensing point. Thermocouple wire can be used as an extension if necessary.


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Description Price Thermocouple Type Length Maximum Operating Temperature Screened/Unscreened Core Strands Insulation Material Cable Shape Number of Strands American Wire Gauge Series Standards Met Voltage Rating
RS庫存編號 814-0106
BrandRS PRO
TWD653.00
單位
T 50m 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS庫存編號 814-0109
BrandRS PRO
TWD1,371.00
單位
T 100m 260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS庫存編號 814-0096
BrandRS PRO
TWD318.00
單位
T 25m +260°C - 1/0.2mm PFA Teflon Twisted 1 - - - -
RS庫存編號 236-3820
BrandRS PRO
TWD974.00
毎卷:25 米
Reel(s)
K 25m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS庫存編號 611-8040
BrandRS PRO
TWD3,116.00
毎卷:50 米
Reel(s)
T 50m +260°C Unscreened 7/0.2mm PFA Multicore 7 - - - -
RS庫存編號 779-9713
BrandRS PRO
TWD794.00
單位
- - - - - - - - - - - -
RS庫存編號 407-1466
BrandRS PRO
TWD2,448.00
毎卷:25 米
Reel(s)
RTD 25m +80°C Screened 7/0.2mm PVC Multicore 7 - - - -
RS庫存編號 827-6066
BrandRS PRO
TWD1,037.00
單位
K 25m +350°C - 1/0.2mm Glass Fibre Flat Pair 1 - - - -
RS庫存編號 219-4573
BrandRS PRO
TWD1,920.00
毎卷:100 米
Reel(s)
K 100m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS庫存編號 827-6047
BrandRS PRO
TWD4,892.00
單位
K 50m +260°C - 1/0.315mm PTFE Flat Pair 1 - - - -
RS庫存編號 151-209
BrandRS PRO
TWD423.00
毎卷:10 米
Reel(s)
- - - - - - - - - - - -
RS庫存編號 611-7889
BrandRS PRO
TWD3,949.00
毎卷:100 米
Reel(s)
K 100m +105°C Unscreened 7/0.2mm PVC Multicore 7 - - - -
RS庫存編號 236-3842
BrandRS PRO
TWD2,598.00
毎卷:25 米
Reel(s)
K 25m +400°C Screened 7/0.2mm Fibreglass Multicore 7 - - - -
RS庫存編號 219-4595
BrandRS PRO
TWD1,048.00
毎卷:10 米
Reel(s)
K 10m +400°C Unscreened 7/0.2mm Fibreglass Multicore 7 - - - -
RS庫存編號 407-1488
BrandRS PRO
TWD4,161.00
毎卷:25 米
Reel(s)
K 25m +200°C Unscreened 7/0.2mm PTFE Single Core 7 - - RoHS Compliant -
RS庫存編號 768-6591
BrandRS PRO
TWD721.00
單位
J 5m +220°C - 7/0.2mm PVC Multicore 7 - - IEC, RoHS Compliant -
RS庫存編號 768-6594
BrandRS PRO
TWD1,271.00
單位
K 10m +220°C - 7/0.2mm PVC Multicore 7 - - IEC, RoHS Compliant -
RS庫存編號 768-6623
BrandRS PRO
TWD1,258.00
單位
N 10m +220°C - 7/0.2mm PVC Multicore 7 - - IEC, RoHS Compliant -
RS庫存編號 827-5855
BrandRS PRO
TWD2,185.00
單位
J 50m +350°C - 7/0.2mm Glass Fibre Flat Pair 7 - - - -
RS庫存編號 200-0628
BrandRS PRO
TWD13,352.00
單位
K 100m +250°C - - PFA Teflon - - - - - -