UP/ALPTW-20-JX is a Type JX Thermocouple Wire, 20 AWG, 2C, Solid, PVC Insulation, Black

Used on a wide range of applications, thermocouple wire, also known as high temperature wire, is a sensor for measuring temperatures. Two divergent wires are joined together at one end forming a connection that produces electric energy from the two separate temperatures of the wires.