FSR self-regulating heating cable is constructed of a semi-conductive heater matrix extruded between parallel bus wires, a self-regulating cable adjusts its output to independently respond to ambient temperatures all along its length. This product has been used for over 1000,000 meters in our company’s key partners, PetroChina, CNOOC,Sinopec,China Aerospace,Wanhua Chemical and other global Fortune 500 companies.