Hand Cranked Mobile Alarm with Bracket

• Customization: Available
• Type: Industry Alarm
• Working Mode: Hand Movement
• Application: Indoor, Outdoor
• Province: Zhejinag
• Trademark: SNTOOM
• Origin: China
• Production Capacity: 500000

Product Description

Technical Specifications

Parameter	Specification
Model Number	STSY-100L
Alarm Type	Mechanical Siren
Operation	Manual Hand-Crank
Sound Output	110 dB @ 1m
Frequency	550 Hz
Height Range	96 cm (low) - 121 cm (high)
Lift Adjustment	25 cm vertical range
Color	Green (Standard)
Material	Powder-Coated Steel
Weight	8.5 kg

 

Key Features

 No Power Required - Fully mechanical operation
 Instant Activation - Immediate alarm sound when cranked
 Adjustable Height - Flexible positioning (96-121 cm)
 Durable Construction - Weather-resistant steel body
 Portable - No wiring or batteries needed

 

How It Works

The siren generates sound through gear-driven air compression:

1. Hand crank turns internal gears

2. Gearbox accelerates rotation (up to 6,000 RPM)

3. Whistling wheel compresses air, creating a 110dB alarm tone

 

Applications

Sector	Use Case
Civil Defense	Emergency evacuation signals
Military	Field communication & alerts
Prisons	Riot control & lockdown warnings
Mining	Underground emergency notifications
Agriculture	Livestock/wildlife deterrent
Oil & Gas	Backup alarm during power failures

 

Advantages Over Electric Alarms

→ Works in blackouts & EMP conditions
→ No maintenance (no batteries/motors)
→ Unlimited runtime (operator-dependent)
→ EMP-proof (ideal for military use)

Package Includes:
1× Hand-Crank Alarm Unit
1× Ground Spike for Outdoor Use
1× Wall-Mount Bracket (optional)
1× Operation Manual

Why Choose STSY-100L?
 Reliable - No power/fuel required
 Loud - 110dB covers 500m+
 Versatile - Adjustable height & portable
 Military-Grade - Used by armed forces