Burglary / Intrusion Detection
Security System Devices
One of the most common points of entry for a break-in to occur is at a door. For this reason, ASMD always suggests protecting every perimeter door of a business. If a door is left unlocked or pried open, having a contact on it will trip an immediate alarm or, on entry doors, a delayed alarm.
Commercial exterior doors are protected utilizing magnetic contact switches that, when separated a specified distance, will trigger a zone alarm. When overhead doors need to be protected, you can install a larger contact that works on the same principle, but has a larger gap distance to allow for doors that shift in the wind.
On certain installations, interior doors should be contacted when they are in path that would require an intruder to pass through them. These doors are contacted just like exterior ones, but sometimes use recessed magnetic or pressure switches inside the door frame for reduced visibility.