Ajax Sirens

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Ajax Sirens: Deter and Drive Away

The siren is the most underestimated component of an alarm system. A detected but silent intrusion allows the burglar to work undisturbed. A powerful, visible, and difficult-to-neutralize siren shortens the break-in – often that's all that's asked of it.

Indoor or Outdoor?

HomeSiren is the indoor siren. Compact, it is placed in a hallway or stairwell. Its role is to make presence in the building unbearable and to signal to occupants that an alarm is in progress.

StreetSiren is the outdoor siren. It plays on two levels: noise, and above all, visibility. A facade siren sends a signal to potential burglars long before any attempt. Many break-ins never start for this reason alone.

StreetSiren DoubleDeck adds a compartment for inserting a custom panel – logo, remote monitoring mention – further enhancing the deterrent effect.

Anti-tamper Protection

All Ajax sirens include a tamper contact: any attempt to open the casing or tear it from its mount immediately triggers the alarm. Outdoor models also have an internal battery: cutting the power doesn't silence them.

Where to Install It?

The rule is simple: as high as possible and as visible as possible. On the facade, more than 2.5 m from the ground, out of reach of an improvised ladder, and on the side most exposed to the street. Indoors, avoid placing it in the protected room itself: an intruder who reaches it in three seconds has not been deterred.

Frequently Asked Questions

What sound power?
Ajax sirens deliver between 85 and 113 dB depending on the model. Beyond 100 dB at one meter, staying in the room becomes genuinely difficult.

How many sirens per system?
A Hub accepts up to 10 combined sirens and keypads. In practice, one outdoor siren and one or two indoor sirens are sufficient for a home.

Does the siren work in the event of a power outage?
Yes. Ajax sirens are self-powered by an internal battery and remain operational regardless of mains power.

Is there a legal duration limit in Belgium?
Yes, the operating duration of an outdoor siren is regulated. Ajax's default settings remain within usual limits; check the communal regulations applicable to your address.