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 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 363-0317
BrandRS PRO
TWD243.00
Each
units
J 1/0.2mm 1m +250°C - - Miniature Plug 1m IEC -
RS Stock No. 150-004
BrandRS PRO
TWD513.00
Each
units
J 1/0.3mm 2m +400°C - - Cable 2m BS -
RS Stock No. 814-0159
BrandRS PRO
TWD260.00
Each
units
T 1/0.3mm 1m +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
TWD603.00
Each
units
K 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2344
BrandRS PRO
TWD410.00
Each
units
J 6.35mm 1m +200°C - - Cable 1m RoHS Compliant -
RS Stock No. 228-7467
BrandRS PRO
TWD657.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 804-7990
BrandRS PRO
TWD730.00
Each
units
K - 2m - - - Cable - IEC -
RS Stock No. 824-0635
BrandRS PRO
TWD1,179.00
Each
units
K 1mm 100mm +800°C Inconel 600 - Cable 1m RoHS Compliant 7 s
RS Stock No. 397-1488
BrandRS PRO
TWD718.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Miniature Plug - IEC -
RS Stock No. 621-2237
BrandRS PRO
TWD620.00
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 409-4908
BrandRS PRO
TWD296.00
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m RoHS Compliant 0.1 s
RS Stock No. 363-0244
BrandRS PRO
TWD259.00
Each
units
J 1/0.2mm 1m +250°C - - Miniature Plug 1m IEC -
RS Stock No. 219-4652
BrandRS PRO
TWD1,017.00
Each
units
N 3mm 300mm +1300°C Nicrosil Alloy - Cable 1m IEC -
RS Stock No. 397-1517
BrandRS PRO
TWD871.00
Each
units
K 1.5mm 250mm +1100°C Stainless Steel - Standard Plug - IEC -
RS Stock No. 824-0603
BrandRS PRO
TWD837.00
Each
units
K 1mm 100mm +800°C Inconel 600 - Miniature Plug - RoHS Compliant <2 s
RS Stock No. 787-7822
BrandRS PRO
TWD647.00
Each
units
K 1mm 150mm +750°C Inconel 600, Stainless Steel - Cable 100mm IEC -
RS Stock No. 159-130
BrandRS PRO
TWD1,230.00
Each
units
K 3mm 2m +1100°C Inconel 600 - Cable 100mm BS -
RS Stock No. 804-7981
BrandRS PRO
TWD532.00
Each
units
K - 1m - - - Cable - IEC -