What is a thermocouple? How do they work?
![What is a thermocouple? How do they work?](https://www.processparameters.co.uk/wp-content/uploads/2019/07/explaining-how-does-a-thermocouple-work.jpg)
A thermocouple is a device for measuring temperature. It comprises two dissimilar metallic wires joined together to form a junction.
A front and back diagram to show what a thermocouple is and explain how it measures temperatures using two metallic wires.
A Process Parameters type K thermocouple made from Nickel-Chromium or Nickel-Alumel with green casing.
A Process Parameters type J thermocouple made from Iron / Copper-Nickel (aka Constantin) with black casing.
![](http://www.wardburner.com/images/363_Thermocouple_illust.jpg)
Ward Burner Systems - Power Burners, Raku Burners, and Kilns
![](https://assets-global.website-files.com/64ed06228d24e5d52132b49f/64f0ab2c0b98bb3d3385fc6b_Thermocouple-working-principle-Thermoelectric-effect.gif)
Thermocouple Explained Working Principles - RealPars
![](https://components101.com/sites/default/files/components/Basics-of-Thermocouple.jpg)
How Thermocouples Works and Basic Working Principle
![](https://instrumentationtools.com/wp-content/uploads/2015/12/instrumentationtools.com_thermocouple-reference-junction.png)
Thermocouple Working Principle - Inst Tools
![](https://www.powersystemsdesign.com/images/articles/1509569069-Figure%201%20-%20Thermocouple.jpg)
The ABCs of Thermocouples
![](https://blog.ashcroft.com/hs-fs/hubfs/thermocouple%20circuit.png?width=477&height=173&name=thermocouple%20circuit.png)
How Does a Thermocouple Work?
![](https://content.instructables.com/FFW/4UES/IBGD4ZFL/FFW4UESIBGD4ZFL.png?auto=webp&fit=bounds&frame=1&height=1024&width=1024&auto=webp&frame=1&height=300)
How to Identify Red and Yellow Wires on a K Thermocouplewith a Magnet! - Instructables
![](https://support.celestialfireglass.com/wp-content/uploads/2022/06/how-fire-pit-thermocouple-works.jpg)
Thermocouples: Everything You Need to Know (and then some!)
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How Thermocouples Work - basic working principle + RTD
![](https://www.elprocus.com/wp-content/uploads/2015/02/Thermocouple-Circuit-300x197.jpg)
Thermocouple - Construction, Working Principle & Its Applications