Thermocouples

A Thermocouple is 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 this 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 are various types of thermocouples, each with different characteristics, such as temperature range and their robustness. Each thermocouple is defined by a letter such as “K”. 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 provides protection to prolong its life.

Thermocouples are ideal tools for temperature measurement as they are robust yet affordable solutions.

What are Thermocouples used for?

  • Thermostats
  • Hospital thermometers
  • Vehicle diagnostics
  • Boiler/heating sensors
  • Oven safety features
  • Food thermometers
  • Industrial probes/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. 183-4155
Mfr. Part No.901240/20-1043-2-9000/000
BrandJumo
$105.72
Each
units
K 2mm 9m +1200°C Inconel 600 - - - - 2.6 (Water) s, 34 (Air) s
RS Stock No. 388-0023
Mfr. Part No.R9-1661-025-500
BrandReckmann
$180.07
Each
units
K 0.5mm 38mm +1100°C - - - - - -
RS Stock No. 183-4154
Mfr. Part No.901240/20-1043-2-8500/000
BrandJumo
$101.98
Each
units
K 2mm 8.5m +1200°C Inconel 600 - - - - 2.6 (Water) s, 34 (Air) s
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Exposed junction thermocouple with Copper Disc brazed at tipFast response – ideal for surface measurementHigh temperature adhesive Kapton strips (13 x 18 x 5 mm)Copper disc, 6.35 mm diameter x 0.3 mm thick1/0.2 mm Teflon® insulated twisted wire1 m or ...
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Fast response, welded exposed junction PFA Teflon® insulated flat pair Single pair of PFA insulated conductors, laid flat with PFA jacket Good mechanical strength and flexibility, resistant to oils, acids and other adverse fluids Thermocouple type K 1/0.3mm or 1/0.5mm ...
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A copper/copper-nickel thermocouple housed in a 1.6 mm dia. stainless steel probe. The body is brazed to the probe and the P.T.F.E. insulated cable passes through a waterproof entry. The probe may be steam sterilised. The thermocouple is not isolated ...
From RS Pro an IEC standard Type K ...
Description:
From RS Pro an IEC standard Type K thermocouple temperature sensor designed for taking surface temperature measurements. The thermocouple lead is made from twin-twist wire with a durable PTFE insulation. One end of the lead is terminated with a miniature ...