Thermocouples

A thermocouple is essentially a temperature sensor (a device which 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 which 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 which insulates the wires to prolong their life.

Thermocouples are ideal tools for measurement of high temperatures and are a robust yet affordable solution.

What are Thermocouples used for?

  • Thermostats
  • Hospital thermometers
  • Vehicle diagnostics
  • Boiler/heating sensors
  • Oven safety features
  • Food thermometers
  • Industrial probe sensor

...
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Description Price Thermocouple Type Probe Diameter Probe Length Maximum Temperature Sensed Probe Material Minimum Temperature Sensed 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. 150-004
BrandRS PRO
TWD206.00
Each
units
J 1/0.3mm 2m +400°C - - Cable 2m BS -
RS Stock No. 814-0175
BrandRS PRO
TWD193.00
Each
units
PT 1000 1.25mm - +500°C - - Solder - RoHS Compliant -
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
TWD324.00
Each
units
PT 1000 2mm - +500°C - - Solder - RoHS Compliant -
RS Stock No. 100-7532
Mfr. Part No.NB-PTCO-160
TWD61.00
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
TWD282.00
Each
units
T 1/0.3mm 1m +250°C Copper - Miniature Plug 1m ANSI -
RS Stock No. 814-0165
BrandRS PRO
TWD219.00
Each
units
PT 100 1.2mm - +500°C - - Solder - RoHS Compliant -
RS Stock No. 621-2271
BrandRS PRO
TWD632.00
Each
units
K 6mm 2m +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 370-8555
Mfr. Part No.R14-1B2-4/50T2000
BrandReckmann
TWD1,064.00
Each
units
PT 100 4mm 50mm +260°C - - Cable - - -
RS Stock No. 362-9913
BrandRS PRO
TWD92.00
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. 100-7543
Mfr. Part No.NB-PTCO-192
TWD97.00
Each
units
PT 1000 1.2mm 4mm +300°C - - Solder - - 0.2 (Water) s, 10 (Air) s
RS Stock No. 293-8402
Mfr. Part No.HEL-705-U-0-12-00
BrandHoneywell
TWD747.00
Each
units
PT 1000 2.18mm 4.75mm +260°C Alumina - Lead Wire 305mm - 0.15 s
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
TWD1,002.00
Each
units
K 1.5mm 1.5m +400°C - - Miniature Plug - - 5 s
RS Stock No. 228-7467
BrandRS PRO
TWD688.00
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 100-5983
Mfr. Part No.NB-PTCO-153
TWD180.00
Each
units
PT 1000 1.2mm 4mm +200°C - - Solder - - 0.2 (Water) s, 10 (Air) s
RS Stock No. 621-2237
BrandRS PRO
TWD640.00
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 804-7990
BrandRS PRO
TWD668.00
Each
units
K - 2m +260°C - - Cable - IEC -