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The Dahua DHI-HY-SA40A Standalone Smoke Alarm uses advanced split-spectrum photoelectric sensing to detect smoke quickly and accurately. It features a loud 85 dB alarm, visual LED alerts, test & silence button, and a sealed 10-year lithium battery for maintenance-free indoor fire protection—ideal for homes, apartments, and dormitories.
The Dahua DHI-HY-SA40A Standalone Smoke Alarm is a reliable indoor safety device designed to continuously monitor smoke concentration and provide early fire warning. Using advanced split-spectrum photoelectric sensor technology, it delivers fast response, stable performance, and very low false alarms.
Equipped with a high-volume built-in buzzer (85 dB at 3 meters) and clear LED indicators, the alarm instantly alerts occupants through visual and audible warnings when smoke levels reach the alarm threshold. A sealed 10-year lithium battery ensures long-term, maintenance-free operation, making it ideal for homes, apartments, dormitories, and offices.
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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