Intrusion alarms

Good zoning matters more than any single sensor, because it tells responders where a breach happened. Motion sensors cover rooms and corridors, door and window sensors guard openings, the alarm control panel gathers the zones, and sirens and strobes announce the event. State the number of zones, room dimensions, likely false-trigger sources such as fans or pets, wired or wireless preference, battery backup, and whether signals must reach a monitoring station.