PTFE Wire that is used in a thermocouple from the point of sensing to the point of cold junction compensation (cjc end) where the signal is measured. A thermocouple is a sensor for measuring temperature, that consists of two dissimilar metals that are joined together at the sensing end.
A pair of different Thermocouple wires ( e.g. ) Ni - Cr, Ni - Al, Iron - Constantan, Copper - Constantan, NICR - Constantan etc ( As per DIN - 43760 Standards ) is made in twin flat or round form to make Thermocouple leads being used for accurate temp. measuring and controls. The wires may be designed and manufactured as per customers specific requirements. (PTFE Insulated Thermocouple cable)