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Reliable indoor fire protection with split-spectrum photoelectric sensing, loud 85 dB alarm, and LED indicators. Wirelessly connects up to 24 units, features a 10-year sealed lithium battery, and is ideal for homes, apartments, dorms, and hallways.
The Dahua DHI-HY-SA40A-R8 is a wireless interconnected smoke alarm designed to continuously monitor smoke concentration and provide early fire warning. Using split-spectrum photoelectric sensor technology, it detects smoke quickly with high sensitivity and low false alarms. Once smoke reaches the alarm threshold, the unit emits visual and audible alerts and simultaneously triggers all alarms in the connected network (up to 24 units).
Ideal for residential areas, villas, apartments, dorms, hallways, bedrooms, and living rooms, it ensures comprehensive indoor fire protection.
Advanced split-spectrum smoke sensor for accurate detection
85 dB loud alarm at 3 m for clear warning
Test & silence button (supports infrared remote silencing)
Low battery warning signal
Low power consumption for long service life
Sealed 10-year lithium battery (no replacement needed)
Compact, modern design with SMD circuit board
Model: DHI-HY-SA40A
Detection Type: Smoke
Sensor Type: Photoelectric
Alarm Volume: 85 dB(A) at 3 m
Alarm Modes: Smoke alarm, fault warning, low-battery warning
Silence Duration: 9 minutes
Power Supply: 3 V CR123A lithium battery (sealed, non-replaceable)
Battery Life: Up to 10 years
Coverage Area: 20–40 m² (ceiling height < 8 m)
Operating Temperature: –10 °C to +55 °C
Material: PC + ABS
Color: White
Installation: Ceiling mount
Weight: 110 g
Standby: Green LED flashes once per minute
Alarm: Red LED flashes once per second
Fault: Red LED flashes twice per minute
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