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. 813-878
BrandRS PRO
$53.11
Each
units
PT 100 - - +70°C - - - - - - -
RS Stock No. 228-7445
BrandRS PRO
$33.60
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 100mm IEC -
RS Stock No. 787-7813
BrandRS PRO
$122.63
Each
units
K 6mm 150mm +1100°C Stainless Steel - - Cable - IEC -
RS Stock No. 236-4283
BrandRS PRO
$245.26
Each
units
PT 100 12.7mm 75mm +150°C Stainless Steel - - Cable Gland - - -
RS Stock No. 824-0644
BrandRS PRO
$64.53
Each
units
K 1mm 150mm +800°C Inconel 600 - - Cable 1m RoHS Compliant 0.7 s
RS Stock No. 219-4539
BrandRS PRO
$35.85
Each
units
K 3mm 300mm +1100°C Stainless Steel - - Cable 1m IEC -
RS Stock No. 787-7765
BrandRS PRO
$30.47
Each
units
K 1mm 250mm +750°C Stainless Steel - - Miniature Plug - IEC -
RS Stock No. 813-890
BrandRS PRO
$70.50
Each
units
PT 100 - - +40°C, +110 °C - - - - - - -
RS Stock No. 847-9675
BrandRS PRO
$17.39
Each
units
K 1/0.3mm 1m +250°C - - - Cable 1m ANSI -
RS Stock No. 847-1132
BrandRS PRO
$30.96
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 100mm ANSI -
RS Stock No. 150-026
BrandRS PRO
$39.30
Each
units
J 6mm 200mm +350°C - - - Cable - BS -
RS Stock No. 621-2164
BrandRS PRO
$41.62
Each (In a Pack of 5)
units
T 2mm 1m +350°C Teflon PTFE - - Cable 1m RoHS Compliant 5 s
RS Stock No. 362-9907
BrandRS PRO
$19.23
Each
units
PT 1000 2mm 10mm +500°C Platinum - - Solder - - 0.1 s
RS Stock No. 158-4385
Mfr. Part No.902040/10-387-1003-1-7,5-29-121-20/000
BrandJumo
$76.92
Each
units
PT 100 7.5mm 29mm +270°C Stainless Steel - - Standard Plug - - 6 s (Water)
RS Stock No. 872-2711
BrandRS PRO
$124.02
Each
units
PT 100 6mm 150mm +450°C Stainless Steel - - Connection Head - - -
RS Stock No. 814-0159
BrandRS PRO
$14.66
Each
units
T 1/0.3mm 1m +250°C Copper - - Miniature Plug 1m ANSI -
RS Stock No. 762-1137
BrandRS PRO
$148.54
Each
units
PT 100 13mm 40mm +150°C Aluminium Foil Backing, Silicone Rubber - - Lead Wire 5m - -
RS Stock No. 290-5036
BrandRS PRO
$63.05
Each
units
K 1/0.2mm 40mm +150°C Aluminium Foil Backing, Silicone Rubber - - Cable 1m IEC -
RS Stock No. 312-2939
BrandRS PRO
$293.17
Each
units
RTD - - +40°C - - - - - - -
RS Stock No. 433-4379
BrandRS PRO
$201.23
Each
units
K 3mm 70mm +700°C Stainless Steel - - Miniature Plug 300mm RoHS Compliant 0.7 s