Hand Operated sirens are also referred as Hand Crank Siren. These sirens are used at sites where there is no external power source is available.
As soon as the handle is rotated it starts producing low-frequency sound which is recognized universally. As no external power source is needed these can be carried along and are portable.
Mostly used in:
- Railway Track Mainataince
- Civil Defence.
- Mountain rescue.
- Coast guard warning.
Hand Operated Siren
|Model Number||Ideal Audible Range|