Dahua Alarm Wireless Sensor - HY-SA21A-W2(868) - For Smoke

• 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

Working Principle

• Collection Type : Smoke
• Sampling Period : 10 s
• Sensor Type : Photoelectric

Alarm

• Alarm Type : Smoke alarm, fault alarm, low battery warning
• Alarm Volume : 85dB–90dB(A) at 3 m
• 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 minute
• Low battery warning: Red indicator flashes once per minute : Coverage Area
• When the height of the space is less than 8 m , the protection area of a device is 20 m2–40 m2

Power Supply

• Battery Life : 3 year
• Operating Voltage : 3V CR123A lithium battery (replaceable)
• Operating Current : Monitoring current: ≤ 35uA / Alarm current: ≤ 35mA

Operating Ambient

• Operating Environment : Indoor
• Operating Temperature : -10°C to +55°C
• Operating Humidity : ≤ 95% RH (non condensing)

Appearance

• Color : White
• Casing : ABS
• Dimensions : φ98mm × H43.1mm
• Weight : 140 g
• Installation : Ceiling Mount

Certifications

• Certifications : TÜV and CE listed
• Compliance Standard : EN 14604:2005+AC:2008

Wireless 

• Carrier Frequency :  868 MHz–868.3 MHz
• Communication Distance : Up to 1000 m  in an open space
• Communication Mechanism : Two-way
• Frequency Hopping : Yes
• Encryption Mode : AES128