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. 131-4755
BrandRS PRO
MYR72.41
Each
units
K - - +260°C - - Miniature Plug 1m IEC -
RS Stock No. 621-2394
BrandRS PRO
MYR483.61
Each
units
J 6mm 600mm +700°C 316L Stainless Steel - Connection Head - RoHS Compliant 5 s
RS Stock No. 444-1253
BrandRS PRO
MYR241.15
Each
units
K 0.5mm 500mm +750°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 136-5876
BrandRS PRO
MYR98.84
Each
units
J - - +250°C Teflon PFA - Miniature Plug 3m EN 60584-3:2008, IEC 584-3 -
RS Stock No. 174-1684
BrandRS PRO
MYR345.78
Each
units
K 1.5mm 100mm +850°C - - Miniature Plug 2m ANSI -
RS Stock No. 219-4416
BrandRS PRO
MYR154.11
Each
units
K 3mm 2m +1100°C 316 Stainless Steel - Cable 100mm IEC -
RS Stock No. 324-1816
BrandRS PRO
MYR209.38
Each
units
J 6mm 20mm +400°C 316 Stainless Steel - Cable 2.5m RoHS Compliant 0.7 s
RS Stock No. 110-4473
BrandRS PRO
MYR105.85
Each
units
T - - +220°C - - Miniature Plug 1m ANSI, RoHS Compliant -
RS Stock No. 824-0509
BrandRS PRO
MYR132.63
Each
units
K 1.5mm 250mm +900°C Inconel 600 - Standard Plug - RoHS Compliant 9 s
RS Stock No. 847-1138
BrandRS PRO
MYR112.22
Each
units
K 1.5mm 1m +1100°C Stainless Steel - Cable 100mm ANSI -
RS Stock No. 872-2682
BrandRS PRO
MYR219.61
Each
units
K 4.5mm 750mm +1100°C Stainless Steel - Standard Plug - IEC -
RS Stock No. 824-0534
BrandRS PRO
MYR164.46
Each
units
K 3mm 1000mm +1000°C 310 Stainless Steel - Standard Plug - RoHS Compliant 2 s
RS Stock No. 787-7759
BrandRS PRO
MYR175.29
Each
units
K 6mm 500mm +1100°C Stainless Steel - Cable 1m IEC -
RS Stock No. 824-0607
BrandRS PRO
MYR117.39
Each
units
K 1mm 150mm +800°C Inconel 600 - Miniature Plug - RoHS Compliant <2 s
RS Stock No. 787-7781
BrandRS PRO
MYR114.63
Each
units
K 1.5mm 500mm +1100°C Stainless Steel - Standard Plug 100mm IEC -
RS Stock No. 433-4335
BrandRS PRO
MYR522.05
Each
units
K 2mm 70mm +700°C Stainless Steel - Miniature Plug 300mm RoHS Compliant 0.7 s
RS Stock No. 136-5887
BrandRS PRO
MYR66.73
Each
units
K - 3m +250°C Teflon PFA - Miniature Plug 3m EN 60584-3:2008, IEC 584-3 -
RS Stock No. 891-9094
BrandRS PRO
MYR150.46
Each
units
T 1mm 250mm +400°C 316 Stainless Steel - Cable 100mm IEC -
RS Stock No. 174-1673
BrandRS PRO
MYR532.90
Each
units
K 4.7mm 63mm +850°C Copper - Miniature Plug 1.5m IEC -
RS Stock No. 847-9726
BrandRS PRO
MYR97.10
Each
units
K 7/0.2mm 5m +250°C - - Miniature Plug 5m ANSI -
Related Products
Mineral insulated Type ’K’ Duplex Thermocouple 310 stainless ...
Description:
Mineral insulated Type ’K’ Duplex Thermocouple 310 stainless steel sheath Sheath can be bent/formed to suit many applications and processes 3.0 or 6.0mm Diameters available Insulated hot junction Probe temperature range -40°C up to +1100°C Standard duplex plug termination (200°C) ...
Fast response, welded exposed junction PFA Teflon® insulated ...
Description:
Fast response, welded exposed junction PFA Teflon® insulated flat pair Single pair of PFA insulated conductors, laid flat with PFA jacket Good mechanical strength and flexibility, resistant to oils, acids and other adverse fluids Thermocouple type K 1/0.3mm or 1/0.5mm ...
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Description:
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The RS PRO IEC K type crocodile clip ...
Description:
The RS PRO IEC K type crocodile clip thermocouple has fibreglass stainless steel over braided PFA Teflon cable. The cable length is 1m and is fitted with a miniature plug. The temperature is between -50°C and 250°C. • Grounded measuring ...