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. 621-2265
BrandRS PRO
TWD604.00
Each
units
J 6mm 2m +350°C Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 814-0175
BrandRS PRO
TWD193.00
Each
units
PT 1000 1.25mm - +500°C - - - Solder - RoHS Compliant -
RS Stock No. 150-004
BrandRS PRO
TWD206.00
Each
units
J 1/0.3mm 2m +400°C - - - Cable 2m BS -
RS Stock No. 363-0317
BrandRS PRO
TWD261.00
Each
units
J 1/0.2mm 1m +250°C - - - Miniature Plug 1m IEC -
RS Stock No. 814-0178
BrandRS PRO
TWD327.00
Each
units
PT 1000 2mm - +500°C - - - Solder - RoHS Compliant -
RS Stock No. 100-7532
Mfr. Part No.NB-PTCO-160
TWD88.00
Each
units
PT 100 0.3mm 2.3mm +600°C - - - Lead - - 0.2 (Water) s, 10 (Air) s
RS Stock No. 814-0159
BrandRS PRO
TWD308.00
Each
units
T 1/0.3mm 1m +250°C Copper - - Miniature Plug 1m ANSI -
RS Stock No. 621-2271
BrandRS PRO
TWD677.00
Each
units
K 6mm 2m +350°C Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 100-7543
Mfr. Part No.NB-PTCO-192
TWD85.00
Each
units
PT 1000 1.2mm 4mm +300°C - - - Solder - - 0.2 (Water) s, 10 (Air) s
RS Stock No. 362-9913
BrandRS PRO
TWD100.00
Each
units
PT 1000 2mm 10mm +500°C Platinum - - Solder - - 0.1 s
RS Stock No. 151-192
BrandRS PRO
TWD293.00
Each
units
K 1/0.3mm 2m +400°C - - - Cable 2m BS -
RS Stock No. 814-0165
BrandRS PRO
TWD228.00
Each
units
PT 100 1.2mm - +500°C - - - Solder - RoHS Compliant -
RS Stock No. 370-8555
Mfr. Part No.R14-1B2-4/50T2000
BrandReckmann
TWD1,898.00
Each
units
PT 100 4mm 50mm +260°C - - - Cable - - -
RS Stock No. 621-2344
BrandRS PRO
TWD423.00
Each
units
J 6.35mm 1m +200°C - - - Cable 1m RoHS Compliant -
RS Stock No. 456-7967
Mfr. Part No.0602 0645
BrandTesto
TWD1,152.00
Each
units
K 1.5mm 1.5m +400°C - - - Miniature Plug - - 5 s
RS Stock No. 293-8402
Mfr. Part No.HEL-705-U-0-12-00
BrandHoneywell
TWD1,054.00
Each
units
PT 1000 2.18mm 4.75mm +260°C Alumina - - Lead Wire 305mm - 0.15 s
RS Stock No. 824-0635
BrandRS PRO
TWD1,218.00
Each
units
K 1mm 100mm +800°C Inconel 600 - - Cable 1m RoHS Compliant 0.7 s
RS Stock No. 621-2237
BrandRS PRO
TWD640.00
Each
units
J 0.2mm 2m +350°C Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 100-5983
Mfr. Part No.NB-PTCO-153
TWD164.00
Each
units
PT 1000 1.2mm 4mm +200°C - - - Solder - - 0.2 (Water) s, 10 (Air) s
RS Stock No. 397-1488
BrandRS PRO
TWD752.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - - Miniature Plug - IEC -