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A Quick Guide to Thermocouple Wire Color Coding

Using the wrong thermocouple wire can be a costly mistake. Consistent labeling is key when it comes to differentiating exactly which types of thermocouple wire you’re working with or which types you need to order. That’s why there are established color codes in place to help.

There are two governing bodies that have developed color codes that are generally accepted around the world: The American National Standards Institute (ANSI) and the International Electrotechnical Commission (IEC). The color code you should follow depends on where you are. GeoCorp is in the U.S., so we follow ANSI color codes, while IEC standards are international.

There are plenty different types of thermocouples, so it’s good to get on the right page when it comes to color codes.


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The Three Thermoelectric Effects that Impact Thermocouples

When you use thermocouples to measures temperatures, you can thank the thermoelectric effect. This physical phenomenon involves the direct conversion of voltages to temperature and vice versa which can be used to measure temperatures. 

The thermoelectric effect is made up of three separate effects that have been discovered over time: The Seebeck effect, Peltier effect, and Thomson effect. Each one plays a role in what allows your thermocouples to do their job so you can get the accurate temperature readings you need to efficiently run your business. Here’s a quick rundown of the three effects that allow your thermocouples to work.


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Why Extreme Heat Environments Call for High Temperature Thermocouple Wire

You wouldn’t want a veterinarian performing your heart surgery. Using people or products that aren’t meant for a certain job can be risky, causing future problems that can cost you and your business. That idea applies to high temperature thermocouples.

If your temperature sensors can’t stand the heat, you’ve got a problem. While some thermocouples are designed to measure a wide range of environments, not all designs are meant to handle excessive temperatures. For that, you’ll want a solution meant for use in extreme environments.