The Filaflex® twisted construction was designed for economical, expandable thermocouples at high temperature applications up to 1400℉ (760℃)
Filaflex® insulation contains a high tensile strength low alkali magnesia alumina silicate vitreous fiber braid. Prior to impregnation, the insulation is inorganic, incombustible, and will neither expand or contract with moisture changes. Once the material has been braided onto the wire, it is impregnated with a special binder for color coding and to improve moisture and abrasion resistance. These insulated singles are then twisted together (with no jacket applied) for easy installation and flexibility in most applications.