SX-100A fixed hand alarm sound pressure level: 110± 2dB sound frequency: 550± 20Hz Weight: 1.27kg Material: Aluminum alloy
Average sound pressure level (*): 110dB (at a radius of 1 meter) Effective range: 500M
ST-100A hand cranked alarm sound
Pressure level: 110± 2
Output frequency: 550± 20
Weight: 1.2kg
Average sound pressure level (*) 110 decibels (at a radius of 1 meter)
Effective range: 500 meters
Hand operated alarm, is a type of hand operated sound that does not require power support, and its name varies depending on the location (hand operated alarm, manual alarm, manual alarm, portable alarm, no power alarm). It includes a handle, gear speed increasing mechanism, clutch slider, fixed wheel, ringing wheel, sound window cover, gear box, and box frame. The handle is connected to the driving shaft of the gear speed increasing mechanism, the output shaft of the gear speed increasing mechanism is connected to the clutch slider through a pin, and the clutch slider is connected to the flange friction transmission of the impeller. Its purpose is to provide power without the need for power support, and to make the alarm sound an alarm signal by shaking the handle. The sound level depends on the hand cranking speed. It can be divided into fixed hand alarm and portable hand alarm in terms of style and purpose. The hand cranked alarm is lightweight, easy to carry, and can be disassembled and stacked. When the handle is manually cranked, it will sound an alarm. After the Wenchuan earthquake and during the treatment of the barrier lake, this type of manual alarm played a positive role because power and traffic were blocked, and other mobile alarms could not enter the alarm area. The lightweight and portable manual alarm became the alarm. Widely used in factories, schools, departments, flood control, natural disasters, open-air military camps, air defense, mountain rescue and seaside outposts, forest fire prevention, flood control, firefighting, prison, reservoirs, ships, mines, plains, pastures, gas stations, airports, forest farms, hotels, and other emergency venues. Can effectively provide timely warning during the incident, reduce people's property damage and casualties. Any unexpected event in any location< SX-100A Fixed Hand Alarm