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. 621-2265
BrandRS PRO
TWD587.00
Each
units
J 6mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 150-004
BrandRS PRO
TWD513.00
Each
units
J 1/0.3mm - +400°C - - Cable 2m BS -
RS Stock No. 363-0317
BrandRS PRO
TWD214.00
Each
units
J 1/0.2mm - +250°C - - Miniature Plug 1m IEC -
RS Stock No. 814-0159
BrandRS PRO
TWD228.00
Each
units
T 1/0.3mm - +250°C Copper - Miniature Plug 1m ANSI -
RS Stock No. 151-192
BrandRS PRO
TWD380.00
Each
units
K 1/0.3mm 2m +400°C - - Cable 2m BS -
RS Stock No. 621-2271
BrandRS PRO
TWD567.00
Each
units
K 6mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2344
BrandRS PRO
TWD333.00
Each
units
J 6.35mm 1m +200°C - - Cable 1m RoHS Compliant -
RS Stock No. 456-7967
Mfr. Part No.0602 0645
BrandTesto
TWD2,611.00
Each
units
K 1.5mm 1.5m +400°C - - - - - 5 s
RS Stock No. 228-7467
BrandRS PRO
TWD475.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 824-0635
BrandRS PRO
TWD785.00
Each
units
K 1mm 100mm +800°C Inconel 600 - Bare Wire Tail 1m RoHS Compliant 7 s
RS Stock No. 804-7990
BrandRS PRO
TWD730.00
Each
units
K - - - - - - - IEC -
RS Stock No. 397-1488
BrandRS PRO
TWD487.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Miniature Plug - IEC -
RS Stock No. 621-2237
BrandRS PRO
TWD474.00
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 363-0244
BrandRS PRO
TWD236.00
Each
units
J 1/0.2mm - +250°C - - Miniature Plug 1m IEC -
RS Stock No. 409-4908
BrandRS PRO
TWD296.00
Each
units
K 0.2mm - +250°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m RoHS Compliant 0.1 s
RS Stock No. 472-3319
Mfr. Part No.2098714
BrandFluke
TWD4,462.00
Each
units
K 4.8mm 203.2mm +816°C - - Miniature Plug - - -
RS Stock No. 804-7981
BrandRS PRO
TWD527.00
Each
units
K - - - - - - - IEC -
RS Stock No. 397-1517
BrandRS PRO
TWD667.00
Each
units
K 1.5mm 250mm +1100°C Stainless Steel - Standard Plug - IEC -
RS Stock No. 219-4652
BrandRS PRO
TWD832.00
Each
units
N 3mm 300mm +1300°C Nicrosil Alloy - Cable 1m IEC -
RS Stock No. 824-0647
BrandRS PRO
TWD806.00
Each
units
K 1mm 250mm +800°C Inconel 600 - Bare Wire Tail 1m RoHS Compliant 7 s