A 200mm (8-inch) AC-220V electric bell is an industrial-grade alarm and time-signal device commonly used in schools, factories, and public buildings.
 
Key Specifications (Model SCF-8 / SHF-8)
Bell Diameter: 200 mm (8 inches)
Working Voltage: AC 220V
Power Consumption: 35W
Material: Rust-resistant stainless steel or metal bowl
Coverage Area: Approximately 800 to 1,000 square meters
Switching Capacity: Resistive 10A
Operation Limit: Designed for intermittent ringing (typically under 5 minutes of continuous activation at a time to prevent overheating)