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Intrusion & Alarm

Sirens

An alarm siren is the loud, visible response that scares intruders off and alerts neighbours. The range includes Dahua wired and wireless indoor and outdoor sirens, some with a light or intercom, and Ajax HomeSiren, StreetSiren and StreetSiren DoubleDeck Jeweller models.

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How to choose an alarm siren

Most installations use one indoor siren to unsettle an intruder and one outdoor siren to attract attention from the street.

  • Indoor or outdoor: outdoor sirens need a weather-resistant housing and should be mounted high, out of easy reach. Indoor sirens go in a central corridor or hall.
  • Sound level: compare the dB rating on the datasheet. A louder siren carries further across a compound or busy road.
  • Light: a strobe or LED light helps neighbours and patrols identify which building has the alarm.
  • Wired or wireless: wireless sirens must match the hub's brand and protocol. Wired sirens need an output on the panel and a cable route.
  • Tamper and backup: look for a tamper switch and battery backup so cutting power or wires does not silence the siren.

Sirens are triggered by the alarm hub or panel. Browse the full intrusion and alarm range to complete the system.

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