Hand Crank Siren, Manual Siren, Air RAID Siren ( LK-120A)

Weight: 7kg
Sound pressure decibel: 125 + 2 decibels
Transport distance: 2.5km
Sound pressure level: output frequency: 600 + 20

Material : aluminum alloy 

model : lk-120

  portable or fixed 

 Product Description

1.Define

  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.

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.

3.Using range

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.

4.Product features

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

Specification 



Sound Rating: 

125±2dB(A) @1M 

Output Frequency: 

600±20Hz (Dependent on Rotation Speed)

Sound range:  2500M 

Net Weight: 

7kg

Carton Size: 

30*30*40cm



Features : 

no power supply required 

robust and compact for portability 

powerful low frequency sound

universally recognised signal 

Shutter mechanism to provide a choice of signals:continuous and warble 



Application: 

Camp site,civil defence,mountain rescue,coast guard warning,quarries/mining

carton box 

pack size :

450*370*580MM