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. 363-0250
BrandRS PRO
$21.26
Each
units
K 1/0.2mm - +250°C - -75°C Miniature Plug 1m IEC -
RS Stock No. 219-4725
BrandRS PRO
$48.78
Each
units
J 4.5mm 150mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 409-4920
BrandRS PRO
$19.05
Each
units
K 1.2mm 1m +450°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m IEC 0.1 s
RS Stock No. 621-2271
BrandRS PRO
$47.73
Each
units
K 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2170
BrandRS PRO
$25.51
Each
units
K 0.3mm - +400°C - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 409-4908
BrandRS PRO
$15.97
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m RoHS Compliant 0.1 s
RS Stock No. 397-1264
BrandRS PRO
$56.80
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 1m IEC -
RS Stock No. 824-0631
BrandRS PRO
$54.94
Each
units
K 1.5mm 1000mm +800°C Inconel 600 - Miniature Plug - RoHS Compliant <2 s
RS Stock No. 814-0137
BrandRS PRO
$12.88
Each
units
K 1/0.2mm 1m +250°C - - Miniature Plug 1m ANSI -
RS Stock No. 479-1788
BrandRS PRO
$28.18
Each
units
K 1/0.3mm 3m +250°C - - Miniature Plug 3m RoHS Compliant 0.1 s
RS Stock No. 363-0294
BrandRS PRO
$30.25
Each
units
K 1/0.2mm 2m +350°C - - Miniature Plug 2m IEC Fast
RS Stock No. 397-1258
BrandRS PRO
$40.24
Each
units
K 1.5mm 250mm +1100°C Stainless Steel - Cable 1m IEC -
RS Stock No. 334-2622
BrandRS PRO
$43.84
Each
units
K 5mm 5mm +750°C 316L Stainless Steel - Cable 2.5m RoHS Compliant 0.7 s
RS Stock No. 824-0679
BrandRS PRO
$69.38
Each
units
K 3mm 250mm +1200°C Inconel 600, Stainless Steel - Cable 1m RoHS Compliant 2.1 s
RS Stock No. 621-2316
BrandRS PRO
$60.25
Each
units
K 30 → 40mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2287
BrandRS PRO
$25.82
Each
units
K 6.35mm - +200°C Copper - Cable 1m RoHS Compliant 0.7 s
RS Stock No. 397-1236
BrandRS PRO
$41.96
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - Cable 1m IEC -
RS Stock No. 621-2237
BrandRS PRO
$36.28
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 824-0635
BrandRS PRO
$56.84
Each
units
K 1mm 100mm +800°C Inconel 600 - Cable 1m RoHS Compliant 7 s
RS Stock No. 814-0147
BrandRS PRO
$13.70
Each
units
K 1/0.3mm 1m +350°C - - Miniature Plug 1m ANSI -
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