... / CSA nonincendive model is suitable for use in Class I / II / III, Division 2, Groups A, B, C, D, F, and G ... backlighting (optional)Backlit display eases reading in direct sunlight or in a dark room.Simultaneously displays flow rate in percentage, actual flow rate and totalized ... CE marking and FM/CSA Nonincendive use in Class I / II / III, Division 2, Groups A, B, C, D, E, F, and ...