Outdoor warning siren,Civil defense siren,Tornado sirens,Mechanical sirens

 Outdoor warning siren is a mechanical electrically powered device for generating sound to provide warning of approaching danger and sometimes to indicate when the danger has passed,
These sirens are available in single phase or three phase
which can be used in warning systems for air defence, fire warning, flood warning or other dangerous and emergency situation in cities, industrial area, residential area, military bases, airports, seaports, reservoirs, large factories, etc.