The Series 6 Pressure Switch is a highly reliable pressure switch for tough applications. Its precision machined aluminum body is anodized for maximum corrosion protection. A polyimide film diaphragm operates a field adjustable switch trip point mechanism attached to a long mechanical life, sensitive differential snap-switch(es), except the 6P where a piston replaces the diaphragms. All models are weatherproof rated NEMA 4 and 4X as well as NEMA 7 and 9 for hazardous areas. Models carry Underwriters Laboratories and CSA listing.