|Audio frequency||600±20 Hz|
|Packing size||76*fifty four*70cm|
|Colour||As picture colour|
|Packaging Details||Carton package or CZPTment for Hand Operated Siren|
|Use||Alarm device,Civil defence siren|
Alarms including hand alarm, electric alarm , each place for emergency warning, only hand alarm CZPT power support, powered by turning a crank issued a warning signal effectively. Sound speed depends on the handle moved. Baffle the shutter mechanism is set in the sound window, can select the sound intensity signal, quickly closed the window, blocking, produce different signals.
2 . principle of working
Driven by turning a crank wheel at high speed, when the wheel turns, into the air from the side of the tuyere wheel, high speed and high pressure to set the wheel on absorption of air of resonance in the window of the base and at the same time.
Water conservancy, flood control, reservoir, civil defense, forces, fire control, prisons, mining, gas stations, ships, airport, plains, pasture, forest farms, factories, schools, hotels, hotel and open barracks, the mountain rescue the enterprises and institutions, etc.
Without the power support, compact structure, removable, light weight, easy to carry, sound intensity can be adjusted and produce different signals, low frequency, wide scope of application, etc
Hand operated siren FDH-400B is created to provide efficient warning in purposes in which there is no energy provide.
Powered by rotation the manage,this product has a plate to shut off the seem when up to velocity providing it the capacity to produce diverse tones
Robust and compact,the siren can be very easily transported to distant locations and folds up to a modest measurement for simplicity of handling
no energy source required
strong and compact for portability
potent reduced frequency seem
universally recognised signal
Shutter system to give a selection of alerts:continuous and warble
Camp website,civil defence,mountain rescue,coast guard warning,quarries/mining