Approved for use in most NEC Class I and II hazardous locations, B-Series NEMA 7/9 explosionproof pressure switch can be fitted with various diaphragm materials, including Monel for NACE applications, or external diaphragm seal to resist caustic or corrosive media. Type 316 stainless steel enclosure suits demanding operating environments, including those subject to salt water spray, and carries IP66 rating.