In filter systems there is a permanently existing fire potential. Basic precondition for such danger potentials are combustible raw materials which are processed to small pieces, such as chips or dust in the wood based panel industry or finely ground food and animal feed. Especially in filters, these materials form an explosive atmosphere in connection with oxygen in the air, which is merely awaiting an appropriate ignition source to cause a damaging fire or explosion.

As machine tools or dryers cannot be prevented from generating sparks or glowing embers, which are transported via pneumatic or mechanical conveying systems to downstream plant areas that are at risk of explosion, the potential for unscheduled events are a constant threat.