Miniature Surface Mount with Armored Cable overhead door magnetic contact is for use in 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 Sentrol's exclusive polyurethane potting material to prevent damage due to moisture or humidity. A wide operation gap distance of up to three inches makes installation easy and helps prevent false alarms caused by door movement or damaged and loose fitting doors. Features and Benefits Miniature, low-profile design Stainless steel armored cable for added security, reliability Wide working gap for overhead doors Small size less likely to be damaged by forklifts Aluminum bar stock resists corrosion in harsh environments Mounting hardware included Jacketed lead available