Defender Siren Electomechanical sirens are widely used in: 1. Civil defense warning systems of cities all over the world. 2. Fire or accident warning systems of factories,mining industry,residential or business area,public buildings,forest,docks,and warehouse,etc. 3. Alarm systems for oil fields,airports,seaports,frontier defence,military bases,police satations,jails,etc.

Defender Siren

LARGE ELECTROMECHANICAL SIRENS

Large electromechanical sirens are traditional sirens which have been widely used all over the world.Each electromechanical siren consists of an electric motor which turns a fan call the "rotor " or "impeller",spinning inside a slotted drum called the "stator".
Electomechanical sirens are widely used in: