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. 370-6199
BrandRS PRO
$83.24
1 Reel of 25 Metre(s)
Reel(s)
K 1 25m -10°C +105°C Screened - PVC Single Core - - - - RoHS Compliant
RS Stock No. 827-5669
BrandRS PRO
$57.67
Each
units
J 2 50m -10°C +105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5791
BrandRS PRO
$37.86
Each
units
T 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. 827-5959
BrandRS PRO
$40.38
Each
units
T 2 50m -75°C +260°C - 1/0.508 mm PFA Teflon Twisted 1 0.508 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5867
BrandRS PRO
$198.73
Each
units
K 2 50m -60°C +350°C - 7/0.2 mm Glass Fibre Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6040
BrandRS PRO
$62.28
Each
units
T 2 25m -75°C +260°C - 1/0.508 mm PTFE Flat Pair 1 0.508 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5820
BrandRS PRO
$111.19
Each
units
T 2 100m -75°C +260°C - 1/0.2 mm PTFE Twin Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5596
BrandRS PRO
$35.01
Each
units
J 2 50m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5902
BrandRS PRO
$52.95
Each
units
J 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. 827-5741
BrandRS PRO
$159.38
Each
units
J 2 100m -75°C +260°C - 7/0.2 mm PFA Teflon Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-6088
BrandRS PRO
$28.77
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
RS Stock No. 827-5984
BrandRS PRO
$50.36
Each
units
J 2 50m -75°C +260°C - 1/0.2 mm PTFE Twisted 1 0.2 mm - - IEC 584-3, RoHS Compliant
New
RS Stock No. 185-3015
BrandRS PRO
$148.42
Each
units
- - - - - - - - - - - - - -
RS Stock No. 827-5785
BrandRS PRO
$298.44
Each
units
K 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. 178-0951
BrandRS PRO
$148.64
Each
units
J 1 100m -75°C +260°C Screened 1/0.3 mm PFA Twin Twisted 1 0.3 mm - - -
New
RS Stock No. 185-3009
BrandRS PRO
$327.35
Each
units
- - - - - - - - - - - - - -
RS Stock No. 827-5631
BrandRS PRO
$82.28
Each
units
N 2 50m -10°C +105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5697
BrandRS PRO
$238.55
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. 827-5665
BrandRS PRO
$30.75
Each
units
J 2 10m -10°C +105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 762-1140
BrandRS PRO
$59.45
1 Reel of 25 Metre(s)
Reel(s)
T 2 25m -10°C +105°C Screened 7/0.2 mm PVC Twisted Pair 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
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