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Intrusion & Alarm

Door and Window Sensors

Door and window sensors tell the alarm panel the moment an opening is breached or a frame is forced. The range includes Dahua wired magnetic contacts in plastic and metal housings, shock and vibration detectors, and Ajax DoorProtect, GlassProtect and CombiProtect Jeweller devices for wireless systems.

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Choosing a door and window sensor

A magnetic contact is the simplest perimeter protection there is, but a few details decide whether it works reliably for years.

  • Match the panel: wired contacts need a free zone on a wired panel, while wireless sensors must use the same radio protocol as the hub.
  • Door material: steel doors and frames can weaken the magnetic field, so pick a contact built for metal mounting where needed. Dahua sells separate plastic and metal versions.
  • Gap and alignment: check the maximum gap between magnet and sensor against how much your door or sliding window moves in its frame.
  • Forced entry, not just opening: shock, tilt and vibration detectors raise an alarm while someone is still attacking a shutter, safe or wall, before anything opens.
  • Tamper protection: look for a tamper switch that reports if the cover is removed.

For large glazed areas, add glass-break detectors, and connect everything to a suitable alarm hub or control panel.

Need help choosing?

Tell us what it is for and where it goes, and we suggest models. Have a list of models and quantities? Request a quote.