Dahua AirShield Smoke Detector (DHI-HY-SA21A-W2(868))

Dahua AirShield Smoke Detector (DHI-HY-SA21A-W2(868))
Dahua AirShield Smoke Detector (DHI-HY-SA21A-W2(868))Dahua AirShield Smoke Detector (DHI-HY-SA21A-W2(868))Dahua AirShield Smoke Detector (DHI-HY-SA21A-W2(868))Dahua AirShield Smoke Detector (DHI-HY-SA21A-W2(868))



In stock, immediate despatch

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Part Number:  DA-HY-SA21A-W2-868
Brand:  Dahua
Category  Detectors


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

Model Number DA-HY-SA21A-W2-868
Working Principle 
Collection Type Smoke
Sampling Period 10s
Sensor Type Photoelectric
Alarm Type Smoke alarm, fault alarm, 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 minute

Low battery warning: Red indicator flashes once per minute

Coverage Area When the height of the space is less than 8 m (3.28 ft), the protection area of a device is 20 m2–40 m2
Power Supply  
Battery Life 3 years
Operating Voltage 3V CR123A lithium battery (replaceable)
Operating Current Monitoring current: ≤ 35uA
Alarm current: ≤ 35mA
Colour White
Casing ABS
Dimensions φ98mm × H43.1mm (φ3.85" × H1.70")
Weight 140 g (0.30lb)
Installation Ceiling Mount
Certifications TÜV and CE listed
Compliance Standard EN 14604:2005+AC:2008
Carrier Frequency 868 MHz–868.3 MHz
Communication Distance Up to 1000 m (3280.84 ft) in an open space
Communication Mechanism Two-way
Frequency Hopping Yes
Encryption Mode AES128
Operating Ambient  
Operating Environment Indoor
Operating Temperature -10°C to +55°C (+14°F to +131°F)
Operating Humidity ≤ 95% RH (non condensing)

Through our logistic partners we are able to deliver to most areas in the UK on a next business day service.
Our standard cut off time on the website for standard next day delivery is 4pm but you will still be able to call our sales team anytime up to 5pm to place an order.
We also offer a premium next day pre 12pm and pre 10:30am service to these areas as well as a Saturday and Saturday pre 10:30am delivery. For areas outside of here, such as the Highlands, Isle of Man and Channel islands we are able to provide a 2 business day service.

For orders outside of the UK please call +44 (0)1438 909168 to speak to a member of the team who will be able to assist you.

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