The WISUALARM DHI-HY-SA13A smoke detector is a standalone photoelectric fire detection system from WISUALARM (Dahua). This product includes the following features:

• Photoelectric detection chamber
• DC 3V operation with 2 × 1.5V required alkaline batteries
• Battery life of up to 5 years (typical)
• Test/silence button
• Audible and visual alarm (≥85 dB(A) at 3 m)
• Low battery warning
• Periodic flashing green LED in standby mode
• Fault and alarm indicators

Technical specifications:

• Sampling period 9 s
• Alarm threshold ~0.1–0.2 dB/m
• Silence duration ~9 minutes
• Average monitoring current ≤20 µA
• Average alarm current ≤25 mA

The detector is designed for indoor ceiling installation, compliant with EN 14604:2005 + AC:2008 requirements, CE and TÜV certified. Typical coverage up to 20–40 m² (room height ≤8 m).