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 Termination Type Cable Length Standards Met Response Time Calibrated Accessory Type
RS Stock No. 363-0250
BrandRS PRO
£6.02
Each
Units
K 1/0.2mm 1m +250°C - Miniature Plug 1m IEC - - -
RS Stock No. 611-8264
BrandRS PRO
£45.19
Each
Units
PT 100 6mm 100mm +200°C Stainless Steel Cable 2m - - - -
RS Stock No. 621-2170
BrandRS PRO
£6.23
Each
Units
K 0.3mm - +400°C - Cable 2m RoHS Compliant 0.7 s - -
RS Stock No. 621-2158
BrandRS PRO
£2.824
Each (In a Pack of 5)
Units
K 2mm 1m +250°C Teflon PTFE Cable 1m RoHS Compliant 5 s - -
RS Stock No. 397-1264
BrandRS PRO
£21.47
Each
Units
K 3mm 150mm +1100°C Stainless Steel Cable 1m IEC - - -
RS Stock No. 362-9913
BrandRS PRO
£2.32
Each
Units
PT 1000 2mm 10mm +500°C Platinum Solder - - 0.1 s - -
RS Stock No. 409-4908
BrandRS PRO
£5.59
Each
Units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome Miniature Plug 1m RoHS Compliant 0.1 s - -
RS Stock No. 621-2271
BrandRS PRO
£14.02
Each
Units
K 6mm 2m +350°C Stainless Steel Cable 2m RoHS Compliant 0.7 s - -
RS Stock No. 397-1488
BrandRS PRO
£17.56
Each
Units
K 3mm 150mm +1100°C Stainless Steel Miniature Plug - IEC - - -
RS Stock No. 181-7278
BrandRS PRO
£44.56
Each
Units
K 3mm 150mm +1100°C Stainless Steel Miniature Plug - IEC - SYSCAL -
RS Stock No. 363-0294
BrandRS PRO
£8.78
Each
Units
K 1/0.2mm 2m +350°C - Miniature Plug 2m IEC - - -
RS Stock No. 788-7132
BrandRS PRO
£20.27
Each
Units
PT 100 - 30mm +150°C - - 1 m, 1mm - - - -
RS Stock No. 397-1236
BrandRS PRO
£19.92
Each
Units
K 1.5mm 150mm +1100°C Stainless Steel Cable 1m IEC - - -
RS Stock No. 285-633
BrandRS PRO
£65.79
Each
Units
PT 100 6mm 200mm +450°C Stainless Steel Connection Head - - - - -
RS Stock No. 409-4920
BrandRS PRO
£6.45
Each
Units
K 1.2mm 1m +450°C Nickel Aluminium, Nickel Chrome Miniature Plug 1m IEC 0.1 s - -
RS Stock No. 911-9462
BrandRS PRO
£91.45
Each
Units
K 1.2mm - +450°C Nickel Aluminium, Nickel Chrome Miniature Plug 1m IEC 0.1 s SYSCAL -
RS Stock No. 219-4725
BrandRS PRO
£16.44
Each
Units
J 4.5mm 150mm +350°C Stainless Steel Cable 2m IEC - - -
RS Stock No. 362-9941
BrandRS PRO
£41.80
Each
Units
PT 100 3mm 250mm +250°C Stainless Steel Cable 1m - - - -
RS Stock No. 236-4261
BrandRS PRO
£40.58
Each
Units
PT 100 6mm 150mm +250°C Stainless Steel Cable 1m - - - -
RS Stock No. 259-328
BrandRS PRO
£18.43
Each
Units
J 6mm 170mm +350°C Stainless Steel Cable 2m RoHS Compliant 0.7 s - -