Compare list full


Wondering **what a thermocouple is?** A thermocouple is a temperature sensor that generates a voltage signal based on the temperature difference between two different metals or alloys. It consists of two dissimilar metal wires joined together at one end, forming a junction. When this junction is exposed to a temperature gradient, it produces a small voltage (which is known as the measuring junction) that is proportional to the temperature difference. You can read more about these sensors in our bespoke [Thermocouples Guide.](https://docs.rs-online.com/96d5/0900766b815e5302.pdf)

This phenomenon is known as the Seebeck effect. It occurs because different metals have different electron configurations, resulting in varying electron densities and thermal conductivities. As a result, when the junction is exposed to a temperature difference, an electric current is induced due to the flow of electrons from the hotter metal to the colder metal.

The voltage produced by the thermocouple can be read and measured by a voltmeter or a specialized temperature measurement device. By knowing the relationship between the temperature and the voltage output, typically described in a calibration table or equation specific to the type of thermocouple being used, the temperature at the measurement point can be determined.

**Types of thermocouples**

There are a wide range of thermocouple types available, each with different characteristics such as temperature range and their robustness. Each thermocouple is defined by a letter such as K-Type. **Common thermocouple types also include: Type J, Type K, Type L and Type T**

The letters refer to the type of materials used which indicates what temperature they are usable at. For example, J-Type 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 widely used in various industries for temperature monitoring and control applications. They are ideal tools for the measurement of high temperatures and are a popular choice as they are so robust, reliable and an affordable solution.

**What are Thermocouples used for?**

They can be used in many applications, both domestic and industrial. Some examples include:

- Thermostats
- Hospitals
- Thermometers
- Vehicle Diagnostics
- Boilers and Heating
- Sensors
- Oven Safety Features
- Food Thermometers

Browse the broad range of Thermocouples RS has to offer and order today with next day delivery options available.



Shop our range of Thermocouples. Thermocouple Guide Available. Fast Delivery Options.

Thermocouples | Temperature Sensor | RS

Thermocouples

RS PRO Type T Exposed Junction Thermocouple 5m Length, 1/0.3mm...

RS PRO Type T Thermocouple 100mm Length, 1.6mm Diameter → +250°C

RS PRO Type T Exposed Junction Thermocouple 1m Length, 1/0.3mm...

RS PRO Type T Thermocouple Cable/Wire, 10m, Unscreened, PTFE...

RS PRO Type T Exposed Junction Thermocouple 5m Length, 1/0.2mm...

RS PRO Type T Hypodermic Thermocouple 100mm Length, 1.6mm Diameter → +250°C

RS PRO, Miniature Thermocouple Connector for Use with Type T...

Shop our range of J Type Thermocouple. Browse our latest J Type Thermocouple offers. Find out more today at RS

J Type Thermocouple | RS

Shop our range of K Type Thermocouples. Browse our latest K Type Thermocouples offers. Find out more today at RS.

K Type Thermocouples | RS

Shop our range of N Type Thermocouples. Browse our latest N Type Thermocouples offers. Find out more today at RS.

N Type Thermocouples | RS

Shop our range of T Type Thermocouple. Browse our latest T Type Thermocouple offers. Find out more today at RS

T Type Thermocouple | RS

Buy Correge Thermocouples. Browse our latest Correge Thermocouples offers. Fast and hassle free delivery.

Correge Thermocouples | RS

Buy from our selection of Thermocouples from Gefran. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Gefran Thermocouples | RS

Buy Reckmann Thermocouples. Browse our latest Reckmann Thermocouples offers. Fast and hassle free delivery.

T Type Thermocouple

Popular Searches

Related links