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. 453-8127
Mfr. Part No.M422 1000 A
BrandHeraeus
$10.772
Each (In a Pack of 5)
units
PT 1000 - 3.9mm +350°C - - - Solder - - 0.4 m/s
RS Stock No. 453-8105
Mfr. Part No.M222 1000 A
BrandHeraeus
$8.13
Each (In a Pack of 5)
units
PT 1000 - 2.3mm +350°C - - - Solder - - 0.4 m/s
RS Stock No. 453-8098
Mfr. Part No.M222 100 A
BrandHeraeus
$7.496
Each (In a Pack of 5)
units
PT 100 - 2.3mm +350°C - - - Solder - - 0.4 m/s
RS Stock No. 693-3978
Mfr. Part No.HD421 100 B/2B
BrandHeraeus
$37.66
Each
units
PT 100 2mm 4mm +850°C - - - Solder - - 0.4 m/s
RS Stock No. 453-8111
Mfr. Part No.M422 100 A
BrandHeraeus
$10.544
Each (In a Pack of 5)
units
PT 100 - 3.9mm +350°C - - - Solder - - 0.4 m/s
RS Stock No. 453-8133
Mfr. Part No.MR828 1000 B
BrandHeraeus
$37.782
Each (In a Pack of 5)
units
PT 1000 2.8mm 8mm +500°C - - - Solder - - 0.5 s
RS Stock No. 453-8076
Mfr. Part No.M1020 1000 A
BrandHeraeus
$15.724
Each (In a Pack of 5)
units
PT 1000 - 9.5mm +350°C - - - Solder - - 0.4 m/s
RS Stock No. 453-8060
Mfr. Part No.M1020 100 A
BrandHeraeus
$12.99
Each (In a Pack of 5)
units
PT 100 - 9.5mm +350°C - - - Solder - - 0.4 m/s