Hand Operated Sirens LK-120 type Hand Grand Fire alarms,Hand Crank,Manual Operated,Alarm

Sound Rating: 120±2dB(A) @1M

Output Frequency: 600±20Hz

Effective Range : 2km diameter

Net Weight: 9Kg

Product Description:

 Alarms including hand alarm, electric alarm , each  place for emergency warning,  only hand alarm without 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.

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 LK-120 is designed to provide effective warning in applications where there is no power supply

Powered by rotation the handle,this model has a plate to shut off the sound once up to speed giving it the ability to produce different tones

Robust and compact,the siren can be easily transported to remote locations and folds up to a small size for ease of handling