The 2202 series overhead door magnetic contact is for use in the rigorous environments of commercial and industrial installations. The floor mount units are constructed with a low profile heavy cast aluminum housing. The reed switch assembly is fully encased in our exclusive polyurethane potting material to prevent damage due to moisture or humidity. A wide operating gap distance of up to 3 inches makes installation easy and helps prevent false triggering caused by door movement or damaged and loose fitting doors. The 2202 series is available with a universal style magnet that allows for greater installation flexibility.