The 2205A-L overhead door magnetic contact is designed for use in environments where a heavy duty unit is required. The floor mount units are constructed using a rugged low profile extruded aluminum switch housing and a cast aluminum magnet housing. The reed switch assembly is fully encased in GE Securities exclusive polyurethane potting material to prevent damage due to moisture or humidity. A wide operating gap of up to 3 in makes installation easy and helps prevent false alarms caused by loose fitting doors. The contacts are available with a universal style magnet that allows for greater installation flexibility.