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 Series Termination Type Cable Length Standards Met Response Time Calibrated
RS Stock No. 872-2590
BrandRS PRO
£28.60
Each
Units
K M8 Bolt 25mm +250°C Stainless Steel - Cable 2m IEC - -
RS Stock No. 762-1118
BrandRS PRO
£13.42
Each
Units
K 1/0.3mm 5m +250°C - - Miniature Plug 5m IEC - -
RS Stock No. 621-2209
BrandRS PRO
£6.90
Each
Units
T 0.3mm 2m +350°C - - Cable 2m RoHS Compliant 0.7 s -
RS Stock No. 787-7829
BrandRS PRO
£57.57
Each
Units
K 6mm 300mm +1100°C Stainless Steel - Cable - IEC - -
RS Stock No. 621-2322
BrandRS PRO
£26.35
Each
Units
K 40 → 50mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s -
RS Stock No. 813-806
BrandRS PRO
£11.10
Each
Units
NTC - - +60°C - - - - - - -
RS Stock No. 621-2300
BrandRS PRO
£25.11
Each
Units
K 22 → 30mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s -
RS Stock No. 397-1832
BrandRS PRO
£32.42
Each
Units
PT 100 6mm 150mm +200°C Stainless Steel - Cable 1m - - -
RS Stock No. 334-2616
BrandRS PRO
£27.22
Each
Units
PT 1000 6mm 100mm +100°C Stainless Steel - Cable 2m - - -
RS Stock No. 290-5036
BrandRS PRO
£28.41
Each
Units
K 1/0.2mm 40mm +150°C Aluminium Foil Backing, Silicone Rubber - Cable 1m IEC - -
RS Stock No. 158-626
BrandRS PRO
£8.51
Each
Units
K 7mm 1m +200°C Copper - Cable 1m BS - -
RS Stock No. 219-4539
BrandRS PRO
£15.83
Each
Units
K 3mm 300mm +1100°C Stainless Steel - Cable 1m IEC - -
RS Stock No. 334-2622
BrandRS PRO
£21.15
Each
Units
K 5mm 20mm +750°C 316L Stainless Steel - Cable 2.5m RoHS Compliant 4 s -
RS Stock No. 312-2951
BrandRS PRO
£160.20
Each
Units
RTD - - +50°C - - - - - - -
RS Stock No. 621-2316
BrandRS PRO
£25.40
Each
Units
K 30 → 40mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s -
RS Stock No. 455-4292
BrandRS PRO
£21.19
Each
Units
J 3mm 150mm +760°C - - Cable 1m IEC - -
RS Stock No. 457-3704
BrandRS PRO
£35.02
Each
Units
PT 100 6mm 60mm +200°C Stainless Steel - Cable 2.5m - - -
RS Stock No. 896-8399
BrandRS PRO
£10.76
Each
Units
PT 1000 5mm 50mm +100°C Stainless Steel - Cable 1.5m - - -
RS Stock No. 611-7794
BrandRS PRO
£10.19
Each
Units
PT 100 2.8mm 25mm +650°C Platinum - Solder - - 0.4 s -
RS Stock No. 813-890
BrandRS PRO
£32.07
Each
Units
PT 100 - - +110 °C, +40°C - - - - - - -