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. 809-1010
Mfr. Part No.NTC030HP00
BrandCarel
$26.06
Each
units
NTC, PT1000 - - - - - - - 3m - -
RS Stock No. 787-7790
BrandRS PRO
$49.95
Each
units
K 1.5mm 1m +1100°C Stainless Steel - - Standard Plug - IEC -
RS Stock No. 219-4545
BrandRS PRO
$41.22
Each
units
K - 50mm +100°C - - - Miniature Plug 2m IEC -
RS Stock No. 397-1832
BrandRS PRO
$61.52
Each
units
PT 100 6mm 150mm +200°C Stainless Steel - - Cable 1m - -
RS Stock No. 666-7362
BrandRS PRO
$16.86
Each
units
PT 100 1.2mm 1.6mm +500°C Platinum - - Solder - - 0.1 s
RS Stock No. 480-5102
Mfr. Part No.K5-E-4LS-200C-G1/4A-40
$154.02
Each
units
PT 100 4.5mm 40mm +200°C - - - Cable 2.5m - -
RS Stock No. 548-8269
Mfr. Part No.902520/10-572-1001-1/000
BrandJumo
$110.68
Each
units
PT 100 - - +80°C - - - Cable Gland - - -
RS Stock No. 455-4040
BrandRS PRO
$143.69
Each
units
PT 100 6mm 150mm +450°C Stainless Steel - - Connection Head - - -
RS Stock No. 506-7092
Mfr. Part No.80PR/60
BrandFluke
$179.00
Each
units
PT 1000 4.8mm 90mm +260°C Stainless Steel - - Mini Connector 1m - -
RS Stock No. 813-862
BrandRS PRO
$61.72
Each
units
PT 100 - - +70°C - - - - - - -
RS Stock No. 787-7778
BrandRS PRO
$41.30
Each
units
K 1mm 1m +750°C Stainless Steel - - Miniature Plug - IEC -
RS Stock No. 158-4363
Mfr. Part No.902520/10-572-1001-1/000
BrandJumo
$113.90
Each
units
PT 100 - - +80°C - - - Cable Gland - - 10 ms
RS Stock No. 611-7873
BrandRS PRO
$54.80
Each
units
PT 100 1.5mm 8mm +650°C Platinum - - Solder - - 0.4 s
RS Stock No. 457-3653
BrandRS PRO
$91.36
Each
units
PT 1000 6mm 35mm +100°C Stainless Steel - - Cable 1m - -
RS Stock No. 621-2221
BrandRS PRO
$44.01
Each
units
K 6mm 175mm +1100°C Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 236-4261
BrandRS PRO
$101.54
Each
units
PT 100 6mm 150mm +250°C Stainless Steel - - Cable 1m - -
RS Stock No. 363-0266
BrandRS PRO
$17.69
Each
units
T 1/0.2mm 1m +250°C - - - Miniature Plug 1m IEC -
RS Stock No. 158-626
BrandRS PRO
$17.98
Each
units
K 7mm 1m +200°C Copper - - Cable 1m BS -
RS Stock No. 621-2322
BrandRS PRO
$58.05
Each
units
K 40 → 50mm 2m +1100°C 316 Stainless Steel - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 100-7532
Mfr. Part No.NB-PTCO-160
$3.83
Each
units
PT 100 0.3mm 2.3mm +600°C - - - Lead - - 0.2 (Water) s, 10 (Air) s