Definition: alarms, including the siren crank, electric alarm, audible alarms, sirens diesel, gasoline alarms, sirens and other types of pumps where various emergency alert areas, where only crank siren no media input, providing power to issue an effective warning signal by shaking the handle. Speed of sound depends on the handle. Tone bezel set in the window shutter mechanism, the signal strength may be a wise choice, quickly close the Sound window, blocking the sound, produce different signals.
How it works: By shaking the handle to drive high-speed wheel-ming, when Ming rotation of the wheel, the air enters the next round the side of the entrance, the high pressure air absorption to produce high speed stator window resulting from any resonance.
Use: used in flood control reservoirs of water, civil protection, military, fire, prisons, mining, gas stations, boat, airport, plains, pastures, forests, factories, schools, hotels, restaurants and open-air camps, mountain rescue, etc. Businesses and institutions.
Features: Without the support of power, foldable, lightweight, compact intensity can be adjusted for portable audio produce different signals, low frequency, a wide range of applications.
Type | Sound Rating | Output Frequency | Weight | Material | Effective range |
LK-100P | 110±2dB(A) @1M | 550±20Hz | 0.6kg | ABS | 500M |
LK-100 | 110±2dB(A) @1M | 550±20Hz | 1.2kg | Aluminum Alloy | 500M |
LK-100A | 110±2dB(A) @1M | 550±20Hz | 1.27kg | Aluminum Alloy | 500M |
LK-100B | 110±2dB(A) @1M | 550±20Hz | 1.27kg | Aluminum Alloy | 500M |
LK-120 | 120±2dB(A) @1M | 600±20Hz | 9kg | Aluminum Alloy | 1000M |
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