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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RTD 3 25m -10°C +80°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - -
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RTD 4 25m -10°C +80°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - RoHS Compliant
RS 제품 번호 611-8040
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T 2 50m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS 제품 번호 407-1573
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N 2 10m -10°C +220°C - 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC, RoHS Compliant
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₩180,599.80
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T 2 100m -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
RS 제품 번호 611-8056
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J 2 50m -75°C +260°C Unscreened 7/0.2 mm PFA Multicore 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS 제품 번호 290-4954
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RTD 4 25m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - BS 4937 Part 30 1993 IEC 584-3, RoHS Compliant
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J 2 25m -60°C +350°C - 1/0.315 mm Glass Fibre Flat Pair 1 0.315 mm - - IEC 584-3, RoHS Compliant
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J 2 100m -60°C +350°C - 7/0.2 mm Glass Fibre Flat Pair 7 0.2 mm - - IEC 584-3, RoHS Compliant
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RS 제품 번호 492-9753
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RTD 4 10m -10°C +105°C Screened 7/0.2 mm PVC Multicore 7 0.2 mm - - IEC 751, RoHS Compliant
RS 제품 번호 611-7895
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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 제품 번호 407-1494
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J 1 25m - +200°C Unscreened 7/0.2 mm PTFE Single Core 7 0.2 mm - - RoHS Compliant
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K 2 50m -10°C +105°C Screened 7/0.2 mm PVC Twisted 7 0.2 mm - - IEC 584-3, RoHS Compliant
RS 제품 번호 827-6078
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K 2 50m -60°C +350°C - 1/0.508 mm Glass Fibre Flat Pair 1 0.508 mm - - IEC 584-3, RoHS Compliant
RS 제품 번호 827-6028
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T 2 25m -75°C +260°C - 1/0.315 mm PTFE Twisted 1 0.315 mm - - IEC 584-3, RoHS Compliant