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
TWD613.00
Each
units
J 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 150-004
BrandRS PRO
TWD206.00
Each
units
J 1/0.3mm 2m +400°C - - Cable 2m BS -
RS Stock No. 363-0317
BrandRS PRO
TWD254.00
Each
units
J 1/0.2mm 1m +250°C - - Miniature Plug 1m IEC -
RS Stock No. 814-0159
BrandRS PRO
TWD273.00
Each
units
T 1/0.3mm 1m +250°C Copper - Miniature Plug 1m ANSI -
RS Stock No. 621-2271
BrandRS PRO
TWD632.00
Each
units
K 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 151-192
BrandRS PRO
TWD287.00
Each
units
K 1/0.3mm 2m +400°C - - Cable 2m BS -
RS Stock No. 621-2344
BrandRS PRO
TWD429.00
Each
units
J 6.35mm 1m +200°C - - Cable 1m RoHS Compliant -
RS Stock No. 456-7967
Mfr. Part No.0602 0645
BrandTesto
TWD964.00
Each
units
K 1.5mm 1.5m +400°C - - Miniature Plug - - 5 s
RS Stock No. 228-7467
BrandRS PRO
TWD688.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 621-2237
BrandRS PRO
TWD650.00
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 804-7990
BrandRS PRO
TWD668.00
Each
units
K - 2m - - - Cable - IEC -
RS Stock No. 824-0635
BrandRS PRO
TWD1,235.00
Each
units
K 1mm 100mm +800°C Inconel 600 - Cable 1m RoHS Compliant 7 s
RS Stock No. 397-1488
BrandRS PRO
TWD752.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Miniature Plug - IEC -
RS Stock No. 409-4908
BrandRS PRO
TWD245.00
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m RoHS Compliant 0.1 s
RS Stock No. 472-3319
Mfr. Part No.2098714
BrandFluke
TWD5,215.00
Each
units
K 4.8mm 203.2mm +816°C - - Miniature Plug - - -
RS Stock No. 363-0244
BrandRS PRO
TWD271.00
Each
units
J 1/0.2mm 1m +250°C - - Miniature Plug 1m IEC -
RS Stock No. 804-7874
BrandRS PRO
TWD633.00
Each
units
K 1/0.3mm 5m +350°C - - Miniature Plug 5m IEC -
RS Stock No. 159-130
BrandRS PRO
TWD1,328.00
Each
units
K 3mm 2m +1100°C Inconel 600 - Cable 100mm BS -
RS Stock No. 259-328
BrandRS PRO
TWD831.00
Each
units
J 6mm 170mm +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 324-2421
Mfr. Part No.PTBO/C/M6X100/2000
BrandCorrege
TWD2,004.00
Each
units
J 4mm 40mm +600°C Stainless Steel - Cable 2m IEC 0.7 s