Thermocouple wire is a type of electrical wire that is used to measure temperature. It is made up of two dissimilar metals that are joined together at one end. When the junction of the two metals is heated, a voltage is generated that is proportional to the temperature. This voltage can be measured with a voltmeter or other device to determine the temperature.

There are many different types of thermocouple wire, each with its own unique characteristics. Some of the most common types include Type K, Type J, Type T, and Type E. Each type of thermocouple wire is made from different metals and has a different temperature range.

The type of thermocouple wire that you choose will depend on the specific requirements of your application. Some factors to consider include the temperature range that you need to measure, the accuracy that you need, and the environment in which the thermocouple will be used.

Thermocouple wire is typically installed by welding or soldering the junction of the two metals together. Once the junction is connected, the thermocouple wire can be attached to the object that you want to measure the temperature of.