Thermocouples

A Thermocouple is a device which measures temperature. It is made up of two wires of different metals that, when joined together, create an electrical junction. When the temperature changes at this junction it creates a voltage which can be interpreted to read the temperature. This is also known as the Seebeck effect. You can read more about these tools in our bespoke Thermocouples Guide

Types of thermocouples

There are various types of thermocouples, each with different characteristics, such as temperature range and their robustness. Each thermocouple is defined by a letter such as “K”. Common types include J, K, L and T. The letters refer to the type of materials used and therefore the temperature they are usable at. For example, type J is iron and copper-nickel and is useable from around 0°C to 816°C, depending on other characteristics. Some thermocouples come with an additional sheath which provides protection to prolong its life.

Thermocouples are ideal tools for temperature measurement as they are robust yet affordable solutions.

What are Thermocouples used for?

  • Thermostats
  • Hospital thermometers
  • Vehicle diagnostics
  • Boiler/heating sensors
  • Oven safety features
  • Food thermometers
  • Industrial probes/sensor

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Description Price Thermocouple Type Probe Diameter Probe Length Maximum Temperature Sensed Probe Material Minimum Temperature Sensed Termination Type Cable Length Standards Met Response Time
RS Stock No. 219-4725
BrandRS PRO
MYR93.18
Each
units
J 4.5mm 150mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 259-328
BrandRS PRO
MYR111.35
Each
units
J 6mm 170mm +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2372
BrandRS PRO
MYR367.17
Each
units
J 6mm 400mm +700°C 316L Stainless Steel - Connection Head - RoHS Compliant 5 s
RS Stock No. 896-8402
BrandRS PRO
MYR212.06
Each
units
J 6mm 250mm +750°C Stainless Steel - Connection Head - RoHS Compliant <2 s
RS Stock No. 621-2237
BrandRS PRO
MYR97.77
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2142
BrandRS PRO
MYR26.38
Each
units
J 2mm - +250°C Teflon PTFE - Cable 1m RoHS Compliant 5 s
RS Stock No. 621-2265
BrandRS PRO
MYR91.63
Each
units
J 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 353-4578
BrandRS PRO
MYR467.67
Each
units
J 3mm 5mm +500°C Constantan, Iron - Standard Plug - IEC -
RS Stock No. 621-2259
BrandRS PRO
MYR116.17
Each
units
J 0.2mm 2m +400°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 872-2531
BrandRS PRO
MYR147.61
Each
units
J 4.76mm 25mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 324-2465
BrandRS PRO
MYR367.59
Each
units
J 1.5mm 150mm +400°C 316 Stainless Steel - Cable 2m RoHS Compliant 9 s
RS Stock No. 150-026
BrandRS PRO
MYR135.18
Each
units
J 6mm 200mm - - - Cable - BS -
RS Stock No. 334-2644
BrandRS PRO
MYR144.70
Each
units
J 4mm 4mm +600°C Stainless Steel - Cable 2m RoHS Compliant 15 s
RS Stock No. 872-2519
BrandRS PRO
MYR157.55
Each
units
J 4mm 25mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 621-2215
BrandRS PRO
MYR116.93
Each
units
J 6mm 175mm +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2388
BrandRS PRO
MYR342.24
Each
units
J 6mm 200mm +700°C 316L Stainless Steel - Connection Head - RoHS Compliant 5 s
RS Stock No. 123-6308
BrandRS PRO
MYR41.00
Each
units
J 1/0.2mm 2m +260°C - - Miniature Plug 2m IEC -
RS Stock No. 872-2809
BrandRS PRO
MYR104.30
Each
units
J 3.18mm 13mm +350°C Glass Fibre - Cable 2m IEC -
RS Stock No. 872-2547
BrandRS PRO
MYR133.28
Each
units
J 4.76mm 100mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 123-6326
BrandRS PRO
MYR54.20
Each
units
J 1/0.2mm 2m +250°C - - Miniature Plug 2m IEC -