Thermocouples

A thermocouple is essentially a temperature sensor (a device that 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 the junction it creates a voltage that 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 is a wide range of thermocouples 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 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 that insulate the wires to prolong their life.Thermocouples are ideal tools for the measurement of high temperatures and are a robust yet affordable solution.What are Thermocouples used for?ThermostatsHospital thermometersVehicle diagnosticsBoiler/heating sensorsOven safety featuresFood thermometersIndustrial probe 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 Sensing Element Type Accessory Type
RS Stock No. 363-0323
BrandRS PRO
MYR44.34
Each
units
K 1/0.2mm 1m +250°C - - Miniature Plug 1m IEC - - -
RS Stock No. 219-4539
BrandRS PRO
MYR87.63
Each
units
K 3mm 300mm +1100°C Stainless Steel - Cable 1m IEC - - -
RS Stock No. 896-8395
BrandRS PRO
MYR101.28
Each
units
PT 100 5mm 50mm +100°C Stainless Steel - Cable 1.5m - - - -
RS Stock No. 409-4908
BrandRS PRO
MYR52.10
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m RoHS Compliant 0.1 s - -
RS Stock No. 259-334
BrandRS PRO
MYR140.71
Each
units
K 6mm 170mm +400°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s - -
RS Stock No. 123-6314
BrandRS PRO
MYR69.17
Each
units
K 1/0.508mm 1m +350°C - - Cable 1m IEC - - -
RS Stock No. 611-7851
BrandRS PRO
MYR87.39
Each
units
PT 100 1.5mm 8mm +650°C Platinum - Solder - - 0.4 s - -
RS Stock No. 621-2293
BrandRS PRO
MYR139.41
Each
units
K 13 → 20mm 2m +1100°C - - Cable 2m RoHS Compliant 0.7 s - -
RS Stock No. 237-1663
BrandRS PRO
MYR181.50
Each
units
PT 100 4mm 150mm +250°C Stainless Steel - Lead Wire 1m - - - -
RS Stock No. 788-7132
BrandRS PRO
MYR130.54
Each
units
PT 100 - 30mm +150°C - - - 1 m, 1mm - - - -
RS Stock No. 479-1788
BrandRS PRO
MYR55.34
Each
units
K 1/0.3mm 3m +250°C - - Miniature Plug 3m RoHS Compliant 0.1 s - -
RS Stock No. 621-2372
BrandRS PRO
MYR361.87
Each
units
J 6mm 400mm +700°C 316L Stainless Steel - Connection Head - RoHS Compliant 5 s - -
RS Stock No. 847-1031
BrandRS PRO
MYR120.97
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 1m ANSI - - -
RS Stock No. 611-7845
BrandRS PRO
MYR79.52
Each
units
PT 100 2.8mm 15mm +650°C Platinum - Solder - - 0.4 s - -
RS Stock No. 847-1028
BrandRS PRO
MYR138.71
Each
units
K 1mm 250mm +1100°C Stainless Steel - Cable 1m ANSI - - -
RS Stock No. 151-271
BrandRS PRO
MYR227.22
Each
units
T 1.6mm 100mm +250°C Constantan, Copper - Cable 1.5m BS - - -
RS Stock No. 455-3968
BrandRS PRO
MYR289.22
Each
units
PT 100 6mm 50mm +200°C Stainless Steel - Cable 2m - - - -
RS Stock No. 813-862
BrandRS PRO
MYR176.84
Each
units
PT 100 - - +70°C - - - - - - - -
RS Stock No. 285-633
BrandRS PRO
MYR367.87
Each
units
PT 100 6mm 200mm +450°C Stainless Steel - Connection Head - - - - -
RS Stock No. 621-2221
BrandRS PRO
MYR136.14
Each
units
K 6mm 175mm +1100°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s - -