Dahua motion sensor alarm system for security

HY-SA21A-W2

Wireless Smoke Alarm

Key Points

> Split-spectrum sensor technology

> Test and silence features in one single button

> Loud sound output over 85 dB(A) at 3 meters

> Low quiescent current consumption

> Surface-mount device (SMD) circuit board design

> Low battery warning signal

Specifications

Working Principle
Collection Type Smoke
Sampling Period 10 s
Sensor Type Photoelectric
Alarm
Alarm Type Smoke alarm, fault warning, low battery warning
Alarm Volume 85dB–90dB(A) at 3 m (9.84 ft)
Alarm Mode Visual and audible alarm
Silence Function Yes
Silence Duration About 12 min
Alarm Response Threshold 0.2 dB/m – 0.3 dB/m
Basic Parameters
Indicator Light Red and green LED indicator
Led Instructions Standby: Green indicator flashes once per minute
Alarm: Red indicator flashes once per second
Fault: Red indicator flashes once per minuteLow battery warning: Red indicator flashes once per minute
Coverage Area When the height of the space is less than 8 m (26.25 ft), the protection area of a device is 20 m2–40 m2
Power Supply
Battery Life 3 year

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