Thermocouples

What is a Thermocouple?

A thermocouple is essentially a temperature sensor (a device used for temperature measurement). It is made up of two wires of different metals that, when joined together, create an electrical junction known as a measuring junction.

When the temperature changes at the junction, it creates a voltage that can be interpreted to read the temperature, also known as the Seebeck effect. You can read more about these tools in our bespoke Thermocouples Guide.

Types of thermocouples

There are a wide range of thermocouple types available, each with different characteristics such as temperature range and their robustness. Each thermocouple is defined by a letter such as K-Type. Common types also include:

  • Type J
  • Type K
  • Type L
  • Type T

The letters refer to the type of materials used which indicates what temperature they are usable at. For example, J-Type 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 that insulate the wires to prolong their life.

Thermocouples are ideal tools for the measurement of high temperatures and are a popular choice and they are a robust, reliable and affordable solution.

What are Thermocouples used for?

They can be used in many applications, both domestic and industrial. Some examples include:

  • Thermostats
  • Hospital
  • Thermometers
  • Vehicle Diagnostics
  • Boiler/Heating
  • Sensors
  • Oven Safety Features
  • Food Thermometers

Browse the broad range of Thermocouples RS have to offer and order today for next day delivery.


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Description Price Thermocouple Type Probe Diameter Probe Length Maximum Temperature Sensed Probe Material Series Termination Type Cable Length Standards Met Response Time Calibrated Process Connection Minimum Temperature Sensed Accuracy
RS Stock No. 363-0250
BrandRS PRO
kr 100,78
Each
Units
K 1/0.2mm 1m +250°C - - Miniature Plug 1m IEC - - - - -
RS Stock No. 621-2170
BrandRS PRO
kr 80,88
Each
Units
K 0.3mm 2m +600°C Glass Fibre - Cable 2m RoHS Compliant 0.7 s - - - -
RS Stock No. 787-7703
BrandRS PRO
kr 428,22
Each
Units
K 1mm 1m +1100°C Stainless Steel - Cable 1m IEC - - - - -
RS Stock No. 621-2192
BrandRS PRO
kr 67,19
Each
Units
N 0.3mm 2m +1200°C - - Cable 2m RoHS Compliant 0.7 s - - - -
RS Stock No. 397-1236
BrandRS PRO
kr 367,45
Each
Units
K 1.5mm 150mm +1100°C Stainless Steel - Cable 1m IEC - - - - -
RS Stock No. 181-7278
BrandRS PRO
kr 510,30
Each
Units
K 3mm 150mm +1100°C Stainless Steel - Miniature Plug - IEC - SYSCAL - - -
RS Stock No. 397-1488
BrandRS PRO
kr 294,29
Each
Units
K 3mm 150mm +1100°C Stainless Steel - Miniature Plug - IEC - - - - -
RS Stock No. 397-1264
BrandRS PRO
kr 396,05
Each
Units
K 3mm 150mm +1100°C Stainless Steel - Cable 1m IEC - - - - -
RS Stock No. 621-2158
BrandRS PRO
kr 40,116
Each (In a Pack of 5)
Units
K 2mm 1m +250°C Teflon PTFE - Cable 1m RoHS Compliant 0.5 s - - - -
RS Stock No. 158-907
BrandRS PRO
kr 48,204
Each (In a Pack of 5)
Units
T 1/0.2mm 1m +200°C - - Cable 1m BS - - - - -
RS Stock No. 324-2487
BrandRS PRO
kr 840,03
Each
Units
J 2mm 150mm +400°C 316 Stainless Steel - Cable 2m RoHS Compliant 1 s - - - -
RS Stock No. 363-0294
BrandRS PRO
kr 147,31
Each
Units
K 1/0.2mm 2m +350°C - - Miniature Plug 2m IEC - - - - -
RS Stock No. 181-7301
BrandRS PRO
kr 620,86
Each
Units
K 3mm 250mm +1100°C Stainless Steel - Standard Plug - IEC - SYSCAL - - -
RS Stock No. 397-1545
BrandRS PRO
kr 358,86
Each
Units
K 3mm 250mm +1100°C Stainless Steel - Standard Plug - IEC - - - - -
RS Stock No. 397-1258
BrandRS PRO
kr 376,26
Each
Units
K 1.5mm 250mm +1100°C Stainless Steel - Cable 1m IEC - - - - -
RS Stock No. 219-4387
BrandRS PRO
kr 321,79
Each
Units
K 3mm 500mm +1100°C 316 Stainless Steel - Cable 100mm IEC - - - - -
RS Stock No. 787-7734
BrandRS PRO
kr 419,85
Each
Units
K 3mm 500mm +1100°C Stainless Steel - Cable 1m IEC - - - - -
RS Stock No. 787-7784
BrandRS PRO
kr 332,45
Each
Units
K 3mm 500mm +1100°C Stainless Steel - Miniature Plug 100mm IEC - - - - -
RS Stock No. 181-7287
BrandRS PRO
kr 594,45
Each
Units
K 3mm 500mm +1100°C Stainless Steel - Miniature Plug 100mm IEC - SYSCAL - - -
RS Stock No. 813-806
BrandRS PRO
kr 153,61
Each
Units
NTC - - +60°C - - - - - - - - - -