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 Termination Type Cable Length Standards Met Response Time Accessory Type
RS Stock No. 409-4920
BrandRS PRO
MYR57.28
Each
units
K 1.2mm 1m +450°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m IEC 0.1 s -
RS Stock No. 621-2300
BrandRS PRO
MYR139.41
Each
units
K 22 → 30mm 2m +1100°C 316 Stainless Steel - Cable 2m RoHS Compliant 0.7 s -
RS Stock No. 362-9812
BrandRS PRO
MYR34.26
Each
units
PT 100 2mm 10mm +500°C Platinum - Solder - - 0.1 s -
RS Stock No. 824-0653
BrandRS PRO
MYR163.77
Each
units
K 1.5mm 150mm +800°C Inconel 600 - Cable 1m RoHS Compliant 9 s -
RS Stock No. 621-2265
BrandRS PRO
MYR95.46
Each
units
J 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s -
RS Stock No. 312-2951
BrandRS PRO
MYR933.69
Each
units
RTD - - +50°C - - - - - - -
RS Stock No. 219-4545
BrandRS PRO
MYR99.79
Each
units
K - 50mm +100°C - - Miniature Plug 2m IEC - -
RS Stock No. 621-2142
BrandRS PRO
MYR29.20
Each
units
J 2mm - +250°C Teflon PTFE - Cable 1m RoHS Compliant 5 s -
RS Stock No. 353-4578
BrandRS PRO
MYR461.38
Each
units
J 3mm 5mm +500°C Constantan, Iron - Standard Plug - IEC - -
RS Stock No. 847-9693
BrandRS PRO
MYR57.64
Each
units
K 7/0.2mm 2m +250°C - - Cable 2m ANSI - -
RS Stock No. 312-2945
BrandRS PRO
MYR927.50
Each
units
RTD - - +50°C - - - - - - -
RS Stock No. 762-1128
BrandRS PRO
MYR128.47
Each
units
K 4.5mm 150mm +350°C Stainless Steel - Cable 2m IEC - -
RS Stock No. 219-4523
BrandRS PRO
MYR349.91
Each
units
K 6mm 2m +1100°C Inconel 600 - Cable 100mm IEC - -
RS Stock No. 397-1359
BrandRS PRO
MYR150.27
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 1m IEC - -
RS Stock No. 455-3750
BrandRS PRO
MYR208.91
Each
units
K 3mm 3m +1100°C Inconel 600 - Cable 100mm IEC - -
RS Stock No. 824-0647
BrandRS PRO
MYR165.18
Each
units
K 1mm 250mm +800°C Inconel 600 - Cable 1m RoHS Compliant 7 s -
RS Stock No. 891-9132
BrandRS PRO
MYR101.83
Each
units
PT 100 2mm 10mm +250°C Platinum - Lead Wire 300mm - - -
RS Stock No. 362-9941
BrandRS PRO
MYR252.58
Each
units
PT 100 3mm 250mm +250°C Stainless Steel - Cable 1m - - -
RS Stock No. 362-9840
BrandRS PRO
MYR11.60
Each
units
PT 100 2mm 2.3mm +500°C Platinum - Solder - - 0.1 s -
RS Stock No. 621-2417
BrandRS PRO
MYR623.67
Each
units
K 8mm 150mm +800°C 316L Stainless Steel - Connection Head - RoHS Compliant 20 s -