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. 363-0250
BrandRS PRO
SGD12.24
Each
units
K 1/0.2mm - +250°C - -75°C Miniature Plug 1m IEC -
RS Stock No. 397-1595
BrandRS PRO
SGD34.81
Each
units
PT 100 1.5mm 15mm +650°C Ceramic - Solder - - 0.4 s
RS Stock No. 397-1264
BrandRS PRO
SGD43.67
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 1m IEC -
RS Stock No. 363-0294
BrandRS PRO
SGD17.86
Each
units
K 1/0.2mm 2m +350°C - - Miniature Plug 2m IEC Fast
RS Stock No. 228-7467
BrandRS PRO
SGD32.68
Each
units
K 3mm 150mm +1100°C Stainless Steel - Cable 100mm IEC -
RS Stock No. 762-1130
BrandRS PRO
SGD82.84
Each
units
PT 1000 15mm 30mm +150°C Aluminium Foil Backing, Silicone Rubber - Cable 1m - -
RS Stock No. 290-5036
BrandRS PRO
SGD56.64
Each
units
K 1/0.2mm 40mm +150°C Aluminium Foil Backing, Silicone Rubber - Cable 1m IEC -
RS Stock No. 362-9935
BrandRS PRO
SGD74.75
Each
units
PT 100 3mm 150mm +250°C Stainless Steel - Cable 1m - -
RS Stock No. 219-4674
BrandRS PRO
SGD52.21
Each
units
T 1.6mm 100mm +250°C Stainless Steel - Cable 1.5m IEC -
RS Stock No. 409-4908
BrandRS PRO
SGD14.79
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - Miniature Plug 1m RoHS Compliant 0.1 s
RS Stock No. 219-4545
BrandRS PRO
SGD36.30
Each
units
K - 50mm +100°C - - Miniature Plug 2m IEC -
RS Stock No. 621-2158
BrandRS PRO
SGD13.108
Each (In a Pack of 5)
units
K 2mm 1m +250°C Teflon PTFE - Cable 1m RoHS Compliant 0.7 s
RS Stock No. 621-2237
BrandRS PRO
SGD29.37
Each
units
J 0.2mm - +350°C Stainless Steel - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 762-1128
BrandRS PRO
SGD38.05
Each
units
K 4.5mm 150mm +350°C Stainless Steel - Cable 2m IEC -
RS Stock No. 621-2209
BrandRS PRO
SGD14.22
Each
units
T 0.3mm 2m +350°C - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 847-9681
BrandRS PRO
SGD13.79
Each
units
T 1/0.3mm 1m +250°C - - Cable 1m ANSI -
RS Stock No. 621-2170
BrandRS PRO
SGD12.67
Each
units
K 0.3mm - +400°C - - Cable 2m RoHS Compliant 0.7 s
RS Stock No. 455-3968
BrandRS PRO
SGD85.67
Each
units
PT 100 6mm 50mm +200°C Stainless Steel - Cable 2m - -
RS Stock No. 479-1788
BrandRS PRO
SGD16.07
Each
units
K 1/0.3mm 3m +250°C - - Miniature Plug 3m RoHS Compliant 0.1 s
RS Stock No. 362-9799
BrandRS PRO
SGD11.57
Each
units
PT 100 2mm 10mm +500°C Platinum - Solder - - 0.1 s