Zinc Alloy NC Door Contact Sensor

A mechanically rugged, hardwired magnetic contact switch made from zinc alloy metal, configured as Normally Closed (NC) for direct integration with standard UK alarm panels. Designed explicitly for garage doors and roller shutters, it includes an adjustable surface-mount bracket to accommodate variable door geometries and alignment tolerances. With an operational gap exceeding 50 mm, it delivers stable detection across wide-opening or heavy-moving doors. Its passive, non-powered design ensures silent, zero-maintenance operation — ideal for long-term perimeter protection in residential and small commercial premises across the UK.