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. 621-2451
BrandRS PRO
HK$1,568.62
Each
units
K 8mm 515mm +800°C 316L Stainless Steel - - Connection Head - RoHS Compliant 20 s
RS Stock No. 237-1657
BrandRS PRO
HK$275.22
Each
units
PT 100 5mm 35mm +250°C Platinum - - Lead Wire 450mm - -
RS Stock No. 334-2622
BrandRS PRO
HK$288.21
Each
units
K 5mm 5mm +750°C 316L Stainless Steel - - Cable 2.5m RoHS Compliant 0.7 s
RS Stock No. 814-0147
BrandRS PRO
HK$83.74
Each
units
K 1/0.3mm 1m +350°C - - - Miniature Plug 1m ANSI -
RS Stock No. 387-9786
Mfr. Part No.R9-1661-500
BrandReckmann
HK$682.61
Each
units
K 0.5mm 38mm +1100°C - - - Miniature Plug - - -
RS Stock No. 397-1371
BrandRS PRO
HK$318.83
Each
units
K 6mm 150mm +1100°C Stainless Steel - - Cable 1m IEC -
RS Stock No. 762-1128
BrandRS PRO
HK$221.44
Each
units
K 4.5mm 150mm +350°C Stainless Steel - - Cable 2m IEC -
RS Stock No. 611-8264
BrandRS PRO
HK$539.25
Each
units
PT 100 6mm 100mm +200°C Stainless Steel - - Cable 2m - -
RS Stock No. 621-2142
BrandRS PRO
HK$50.52
Each
units
J 2mm 1m +250°C Teflon PTFE - - Cable 1m RoHS Compliant 5 s
RS Stock No. 312-2939
BrandRS PRO
HK$1,647.12
Each
units
RTD - - +40°C - - - - - - -
RS Stock No. 368-3894
Mfr. Part No.HEL-705-T-0-12-00
BrandHoneywell
HK$400.80
Each
units
PT 100 2.18mm 4.75mm +260°C Alumina - - Lead Wire 305mm - 0.15 s
RS Stock No. 290-5070
BrandRS PRO
HK$178.93
1 Bag of 5
Bag(s)
PT 100 2mm 5mm +500°C Platinum - - Solder - - 0.1 s
RS Stock No. 621-2372
BrandRS PRO
HK$746.87
Each
units
J 6mm 400mm +700°C 316L Stainless Steel - - Connection Head - RoHS Compliant 5 s
RS Stock No. 397-1416
BrandRS PRO
HK$1,021.40
Each
units
PT 100 6mm 150mm +500°C Stainless Steel - - Cable 1m - -
RS Stock No. 362-9799
BrandRS PRO
HK$68.93
Each
units
PT 100 2mm 10mm +500°C Platinum - - Solder - - 0.1 s
RS Stock No. 621-2417
BrandRS PRO
HK$1,287.19
Each
units
K 8mm 165mm +800°C 316L Stainless Steel - - Connection Head - RoHS Compliant 20 s
RS Stock No. 465-567
Mfr. Part No.R15-4A-M12-6-150
BrandReckmann
HK$497.94
Each
units
PT 100 6mm 150mm +350°C - - - M12 Connector - - -
RS Stock No. 621-2164
BrandRS PRO
HK$198.488
Each (In a Pack of 5)
units
T 2mm 1m +350°C Teflon PTFE - - Cable 1m RoHS Compliant 5 s
RS Stock No. 228-7451
BrandRS PRO
HK$176.29
Each
units
K 1.5mm 250mm +1100°C Stainless Steel - - Cable 100mm IEC -
RS Stock No. 443-7951
BrandRS PRO
HK$389.61
Each
units
K 0.5mm 500mm +750°C Stainless Steel - - Cable 100mm IEC -