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. 228-7489
BrandRS PRO
MYR88.23
Each
units
K 3mm 250mm +1100°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 787-7709
BrandRS PRO
MYR127.03
Each
units
K 1mm 500mm +1100°C Stainless Steel - Cable 1m IEC -
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. 787-7822
BrandRS PRO
MYR89.73
Each
units
K 1mm 150mm +750°C Inconel 600, Stainless Steel - Cable 100mm IEC -
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. 219-4523
BrandRS PRO
MYR354.68
Each
units
K 6mm 2m +1100°C Inconel 600 - Cable 100mm IEC -
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. 621-2300
BrandRS PRO
MYR154.81
Each
units
K 22 → 30mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 847-9693
BrandRS PRO
MYR58.43
Each
units
K 7/0.2mm 2m +250°C - - Cable 2m ANSI -
RS Stock No. 219-4545
BrandRS PRO
MYR101.15
Each
units
K - 50mm +100°C - - Miniature Plug 2m IEC -
RS Stock No. 824-0653
BrandRS PRO
MYR166.06
Each
units
K 1.5mm 150mm +800°C Inconel 600 - Cable 1m RoHS Compliant 9 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. 762-1128
BrandRS PRO
MYR106.03
Each
units
K 4.5mm 150mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 290-5036
BrandRS PRO
MYR157.85
Each
units
K 1/0.2mm 40mm +150°C Aluminium Foil Backing, Silicone Rubber - Cable 1m IEC -
RS Stock No. 824-0647
BrandRS PRO
MYR167.67
Each
units
K 1mm 250mm +800°C Inconel 600 - Cable 1m RoHS Compliant 7 s
RS Stock No. 397-1494
BrandRS PRO
MYR91.73
Each
units
K 3mm 250mm +1100°C Stainless Steel - Miniature Plug - IEC -
RS Stock No. 621-2316
BrandRS PRO
MYR142.92
Each
units
K 30 → 40mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 455-3750
BrandRS PRO
MYR256.14
Each
units
K 3mm 3m +1100°C Inconel 600 - Cable 100mm IEC -
RS Stock No. 621-2417
BrandRS PRO
MYR632.60
Each
units
K 8mm 150mm +800°C 316L Stainless Steel - Connection Head - RoHS Compliant 20 s
RS Stock No. 397-1236
BrandRS PRO
MYR112.93
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - Cable 1m IEC -
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:
Mineral insulated type ’K’ thermocouple Highly flexible, sheath can be bent/formed to suit many applications and processes 2.0mm diameter fast response probe Insulated hot junction Probe temperature range -40°C to +1100°C M8 x 2.0mm pitch threaded pot seal Colour coded ...
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 ...