J20-1-304 is a Watlow type J thermocouple wire 20 AWG solid conductor Impregnated fiberglass insulation Continuous use temp: 900 deg. F

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.