W-TT-20-FF90 is a Thermocouple Wire, Type T 1 Pair, AWG 20/Solid, Foil Shield & Drain Wire PFA/PFA, Special Limits of Error

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.