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
PHP2,305.77
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. 236-3836
BrandRS PRO
PHP3,049.15
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. 827-6075
BrandRS PRO
PHP3,008.47
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
RS Stock No. 407-1573
BrandRS PRO
PHP20,733.26
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. 219-4551
BrandRS PRO
PHP1,205.41
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. 219-4573
BrandRS PRO
PHP5,616.76
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 1843, RoHS Compliant
RS Stock No. 611-7895
BrandRS PRO
PHP9,396.62
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. 814-0052
BrandRS PRO
PHP1,730.60
Each
units
K 2 25m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 407-1567
BrandRS PRO
PHP7,644.92
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. 814-0064
BrandRS PRO
PHP6,193.60
Each
units
K 2 100m -60°C 350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 814-0061
BrandRS PRO
PHP2,836.31
Each
units
K 2 50m -60°C 350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 827-5827
BrandRS PRO
PHP19,026.59
Each
units
RTD 4 50m -75°C +260°C Screened 7/0.2 mm PFA Teflon Twisted 7 0.2 mm - - IEC 751, RoHS Compliant
RS Stock No. 236-3842
BrandRS PRO
PHP4,473.80
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. 151-209
BrandRS PRO
PHP751.73
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. 827-6050
BrandRS PRO
PHP622.55
Each
units
T - 2m -25°C +125°C - - Polyurethane Curly - - - - IEC 584-3, RoHS Compliant
RS Stock No. 827-5690
BrandRS PRO
PHP872.35
Each
units
K 2 10m -10°C +105°C - 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS Stock No. 363-0418
BrandRS PRO
PHP3,642.70
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. 814-0115
BrandRS PRO
PHP5,599.84
Each
units
VX 2 200m -10°C 105°C - 7/0.2 mm PVC Flat Pair 7 0.2 mm - - ANSI MC96.1, RoHS Compliant
RS Stock No. 219-4769
BrandRS PRO
PHP891.03
1 Reel of 10 Metre(s)
Reel(s)
R/S 2 10m -10°C +105°C Unscreened 13/0.2 mm PVC Multicore 13 0.2 mm - - BS 1843, RoHS Compliant
RS Stock No. 827-5700
BrandRS PRO
PHP4,459.80
Each
units
K 2 50m -60°C +350°C - 1/0.3 mm Glass Fibre Flat Pair 1 0.3 mm - - IEC 584-3, RoHS Compliant
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