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 Series Termination Type Cable Length Standards Met Response Time
RS Stock No. 363-0250
BrandRS PRO
PHP645.24
Each
units
K 1/0.2mm - +250°C - -75°C - Miniature Plug 1m IEC -
RS Stock No. 397-1264
BrandRS PRO
PHP1,690.42
Each
units
K 3mm 150mm +1100°C Stainless Steel - - Cable 1m IEC -
RS Stock No. 813-834
BrandRS PRO
PHP2,192.35
Each
units
NTC - - +70°C - - - - - - -
RS Stock No. 621-2170
BrandRS PRO
PHP490.51
Each
units
K 0.3mm 2m +400°C Glass Fibre - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 236-4255
BrandRS PRO
PHP2,969.06
Each
units
K 6mm - +250°C Stainless Steel - - Miniature Plug 1m IEC -
RS Stock No. 397-1236
BrandRS PRO
PHP1,568.38
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 1m IEC -
RS Stock No. 762-1128
BrandRS PRO
PHP1,325.80
Each
units
K 4.5mm 150mm +350°C Stainless Steel - - Cable 2m IEC -
RS Stock No. 409-4920
BrandRS PRO
PHP937.34
Each
units
K 1.2mm 1m +450°C Nickel Aluminium, Nickel Chrome - - Miniature Plug 1m IEC 0.1 s
RS Stock No. 621-2316
BrandRS PRO
PHP2,074.06
Each
units
K 30 → 40mm 2m +1100°C 316 Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 219-4545
BrandRS PRO
PHP1,517.13
Each
units
K - 50mm +100°C - - - Miniature Plug 2m IEC -
RS Stock No. 621-2158
BrandRS PRO
PHP272.584
Each (In a Pack of 5)
units
K 2mm 1m +250°C Teflon PTFE - - Cable 1m RoHS Compliant 0.7 s
RS Stock No. 219-4393
BrandRS PRO
PHP1,777.36
Each
units
K 3mm 1m +1100°C 316 Stainless Steel - - Cable 100mm IEC -
RS Stock No. 397-1488
BrandRS PRO
PHP1,459.34
Each
units
K 3mm 150mm +1100°C Stainless Steel - - Miniature Plug - IEC -
RS Stock No. 455-4292
BrandRS PRO
PHP1,635.31
Each
units
J 3mm 150mm +760°C - - - Cable 1m IEC -
RS Stock No. 621-2322
BrandRS PRO
PHP2,352.31
Each
units
K 40 → 50mm 2m +1100°C 316 Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 621-2221
BrandRS PRO
PHP1,606.96
Each
units
K 6mm 175mm +1100°C Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 847-1132
BrandRS PRO
PHP1,198.65
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 100mm ANSI -
RS Stock No. 409-4908
BrandRS PRO
PHP728.70
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - - Miniature Plug 1m RoHS Compliant 0.1 s
RS Stock No. 872-2569
BrandRS PRO
PHP2,027.37
Each
units
J M8 Bolt 13mm +250°C Stainless Steel - - Cable 2m IEC -
RS Stock No. 896-8409
BrandRS PRO
PHP3,042.28
Each
units
K 6mm 250mm +1000°C Stainless Steel - - Connection Head - RoHS Compliant <2 s