Questions answers

PPI/POI industrial warning sirens

Frequently asked questions about the emergency population warning sirens:

How to choose a siren?

The coverage radius is the main value to consider at the time to choose a siren. It is very important to know the size of the area to cover, as this information will be decisive to define the output efficiency of the siren. In addition, it is highly recommended to realize a case study to determine the number of sirens that need to be be installed as the relief and the configuration of the area to cover will be determinant.

What kind of trigger should be choosen?

Several types of triggers are normally used.
The simplest trigger remains the one from the control cabinet.

If you need to trigger your siren in a remote mode, you have the choice between:

  • A remote box connected by cables
  • A telephone transmitter (only 1 siren)
  • A connection to National Alert System

It is very important to know how many sirens should be triggered.
We offer others multi sirens trigger systems:

  • High-debit Radio system (from 1 to 6 sirens)
  • Secured digital radio system with command control system (form 1 to 256 sirens)

Why should i install an emergency population warning siren?

The alert of the population consists in delivering a signal, released by the authorities during an emergency phase, to warn the population of a imminent or current danger, that could affect their physical integrity and require a safe reflex behavior.

Thus, the warning was only deliver to make people behave safely, which simply means, get shelter from danger: evacuate or shelter in a building, waiting for further information.

What are the difference between industrial sirens and national alert sirens?

The main difference is that the sirens, part of the National Alert System, are directly managed by the state or locals authorities – whether for the maintenance or the trigger – and industrial sirens (or PPI Sirens) are under the control of the private operator.

Comment et par qui est diffusé le signal national d'alerte ?

Le signal national d’alerte peut être diffusé par les équipements publics d’alerte (sirènes du Réseau National d’Alerte et sirènes communales) et par les moyens de diffusion propres aux installations soumises à Plan Particulier d’Intervention (sirènes industrielles). Le décret du 12 octobre 2005 relatif au code d’alerte national stipule que le signal national d’alerte est « déclenché sur décision du Premier ministre, des préfets de département et à Paris du préfet de police ou des maires qui informent sans délai le préfet du département. » D’un point de vue technique, le déclenchement peut être fait à distance et de manière automatisée par le préfet, ou localement et manuellement par le maire. S’agissant des sirènes PPI, les mesures d’alerte peuvent être déclenchées sur décision du préfet ou directement par l’exploitant dans les conditions fixées en amont par le préfet de département.

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ORSON France

Global Solutions Consulting, engineering, commissioning and maintenance

Engineering, study, consulting and installation of acoustic solutions
PPI/POI Emergency Population Warning Sirens, sound and air cleaning systems.

+33 (0)1 40 20 07 39