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. 123-6323
BrandRS PRO
$21.50
Each
units
K 1/0.2mm 2m +250°C - - - Miniature Plug 2m IEC -
RS Stock No. 621-2467
BrandRS PRO
$99.36
Each
units
K 6mm 275mm +1100°C 310 Stainless Steel - - Connection Head - RoHS Compliant 20 s
RS Stock No. 621-2338
BrandRS PRO
$230.14
Each
units
K 6mm 150mm +1100°C Stainless Steel - - Connection Head 1m RoHS Compliant -
RS Stock No. 847-1025
BrandRS PRO
$43.00
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 1m ANSI -
RS Stock No. 499-9421
Mfr. Part No.902030/31-380-1003-1-6-100-104/000
BrandJumo
$197.79
Each
units
PT 100 6mm 100mm +400°C Stainless Steel - - Connection Head - - 14 s
RS Stock No. 621-2158
BrandRS PRO
$7.784
Each (In a Pack of 5)
units
K 2mm 1m +250°C Teflon PTFE - - Cable 1m RoHS Compliant 0.7 s
RS Stock No. 158-985
BrandRS PRO
$93.49
Each
units
PT 100 3mm 100mm +200°C Stainless Steel - - Lead Wire 1m - -
RS Stock No. 397-1589
BrandRS PRO
$35.25
Each
units
K 0.075mm 1m +250°C - - - Cable 1m ANSI -
RS Stock No. 891-9141
BrandRS PRO
$40.80
Each
units
PT 100 2mm 10mm +250°C Platinum - - Lead Wire 500mm - -
RS Stock No. 621-2142
BrandRS PRO
$13.58
Each
units
J 2mm 1m +250°C Teflon PTFE - - Cable 1m RoHS Compliant 5 s
RS Stock No. 847-1157
BrandRS PRO
$36.77
Each
units
K 3mm 150mm +1100°C Stainless Steel - - Cable 100mm ANSI -
RS Stock No. 219-4466
BrandRS PRO
$41.75
Each
units
K 1.5mm 500mm +1100°C Inconel 600 - - Cable 100mm IEC -
RS Stock No. 363-0323
BrandRS PRO
$23.71
Each
units
K 1/0.2mm 1m +250°C - - - Miniature Plug 1m IEC -
RS Stock No. 548-8253
Mfr. Part No.902520/10-807-1003-1/330,(0..60°C)
BrandJumo
$128.89
Each
units
PT 100 - - +60°C - - - Cable Gland - - 10 ms
RS Stock No. 891-9151
BrandRS PRO
$43.62
Each
units
PT 1000 2mm 10mm +250°C Platinum - - Lead Wire 1m - -
RS Stock No. 353-4578
BrandRS PRO
$177.96
Each
units
J 3mm 5mm +500°C Constantan, Iron - - Standard Plug - IEC -
RS Stock No. 787-7850
BrandRS PRO
$34.39
Each
units
K 4.5mm 250mm +1100°C Stainless Steel - - Cable 100mm IEC -
RS Stock No. 847-1028
BrandRS PRO
$47.64
Each
units
K 1mm 250mm +1100°C Stainless Steel - - Cable 1m ANSI -
RS Stock No. 872-2590
BrandRS PRO
$65.94
Each
units
K M8 Bolt 25mm +250°C Stainless Steel - - Cable 2m IEC -
RS Stock No. 237-1635
BrandRS PRO
$48.84
Each
units
PT 100 5mm 35mm +450°C Platinum - - Lead Wire 450mm - -