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. 409-4920
BrandRS PRO
MYR64.88
Each
units
K 1.2mm 1m +450°C Nickel Aluminium, Nickel Chrome - - Miniature Plug 1m IEC 0.1 s
RS Stock No. 228-7489
BrandRS PRO
MYR107.09
Each
units
K 3mm 250mm +1100°C Stainless Steel - - Cable 100mm IEC -
RS Stock No. 847-1132
BrandRS PRO
MYR100.71
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 100mm ANSI -
RS Stock No. 787-7709
BrandRS PRO
MYR157.23
Each
units
K 1mm 500mm +1100°C Stainless Steel - - Cable 1m IEC -
RS Stock No. 896-8402
BrandRS PRO
MYR249.95
Each
units
J 6mm 250mm +750°C Stainless Steel - - Connection Head - RoHS Compliant <2 s
RS Stock No. 228-7467
BrandRS PRO
MYR112.70
Each
units
K 3mm 150mm +1100°C Stainless Steel - - Cable 100mm IEC -
RS Stock No. 847-1043
BrandRS PRO
MYR154.03
Each
units
K 3mm 500mm +1100°C Stainless Steel - - Cable 1m ANSI -
RS Stock No. 787-7822
BrandRS PRO
MYR112.66
Each
units
K 1mm 150mm +750°C Inconel 600, Stainless Steel - - Cable 100mm IEC -
RS Stock No. 847-9693
BrandRS PRO
MYR69.93
Each
units
K 7/0.2mm 2m +250°C - - - Cable 2m ANSI -
RS Stock No. 471-1833
Mfr. Part No.80PK-24
BrandFluke
MYR816.00
Each
units
K 3.175mm 215.9mm +816°C Stainless Steel - - Miniature Plug 1m - -
RS Stock No. 548-8792
Mfr. Part No.902350/34-386-2001-1-5-150-2-04-3100/317
BrandJumo
MYR873.77
Each
units
PT 100 5mm 150mm +260°C - - - Cable 3m - -
RS Stock No. 312-2951
BrandRS PRO
MYR1,090.76
Each
units
RTD - - +50°C - - - - - - -
RS Stock No. 762-1128
BrandRS PRO
MYR131.22
Each
units
K 4.5mm 150mm +350°C Stainless Steel - - Cable 2m IEC -
RS Stock No. 509-0799
Mfr. Part No.F 891 000
BrandEberle
MYR222.63
Each
units
RTD - - +70°C - - - - - - -
RS Stock No. 100-7532
Mfr. Part No.NB-PTCO-160
MYR11.76
Each
units
PT 100 0.3mm 2.3mm +600°C - - - Lead - - 0.2 (Water) s, 10 (Air) s
RS Stock No. 621-2300
BrandRS PRO
MYR166.63
Each
units
K 22 → 30mm 2m +1100°C 316 Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 219-4545
BrandRS PRO
MYR125.18
Each
units
K - 50mm +100°C - - - Miniature Plug 2m IEC -
RS Stock No. 548-8786
Mfr. Part No.902350/34-386-2001-1-5-150-2-04-3100/317
BrandJumo
MYR820.52
Each
units
PT 100 5mm 150mm +260°C - - - Cable 3m - -
RS Stock No. 362-9812
BrandRS PRO
MYR39.30
Each
units
PT 100 2mm 10mm +500°C Platinum - - Solder - - 0.1 s
RS Stock No. 312-2945
BrandRS PRO
MYR1,083.53
Each
units
RTD - - +50°C - - - - - - -