Dry Sprinkler Powder Aerosol Extinguishing systems', DSPAs for short, are developed to replace the halon-like extinguishing systems that were mainly used in marine applications. DSPA extinguishing systems have advanced through years of scientific research.

DSPA extinguishing systems act, similar to Halon, volumetrically. This means that a compartment is filled with a minimum quantity of extinguishing material which acts directly on the ignition mechanism of the flame. The solid material of the DSPA system, as opposed to gas systems, enables interaction with the surface of the burning material. Consequently the flames are rapidly extinguishing.

The Dry Sprinkler Powder Aerosol extinguishing system, does not affect the ozone layer, lower the oxygen level or augment the pressure in the compartment where it is activated. The process relies upon solids with a high activating energy, brought together in a normal atmosphere.

The following animation explains this process: