Dahua DHI-HY-SA21A-W2(868) - Wireless Battery Smoke Alarm and Fire Alarm for Home
Product Features
- Dahua DHI-HY-SA21A-W2(868) wireless battery smoke alarm and fire alarm for home, with a photoelectric smoke detector.
- Battery operated smoke alarm, 85dB to 90dB(A) at 3 m, with test and silence on one button.
- Two-way 868MHz wireless with AES128 encryption, up to 1000 m in open space.
- Replaceable 3V CR123A lithium battery with 3 year battery life and a low battery warning.
Dahua DHI-HY-SA21A-W2(868)
The Dahua DHI-HY-SA21A-W2(868) is a wireless smoke alarm and smoke detector in one unit. Dahua lists it as a wireless fire alarm device. It provides battery-powered smoke detection and alarm functions in a single device, using a photoelectric smoke sensing chamber for early detection of smoke and high immunity against unwanted alarms. It needs no mains supply, so it is a battery operated smoke alarm and a battery powered smoke detector, and it works as a home smoke alarm for general residential use such as villas, shops and apartments. Timely notification of the smoke alarm can be displayed on the DMSS App in real time.
Also listed as HY-SA21A-W2(868).
Key features
- 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
- Two-way 868MHz wireless with frequency hopping and AES128 encryption
Technical specification
| Model | DHI-HY-SA21A-W2(868) |
|---|---|
| Product type | Wireless smoke alarm |
| Working principle | Photoelectric |
| Collection type | Smoke |
| Sampling period | 10 s |
| Alarm type | Smoke alarm, fault alarm, low battery warning |
| Alarm mode | Visual and audible alarm |
| Alarm volume | 85dB-90dB(A) at 3 m (9.84 ft) |
| Silence function | Yes, silence duration about 12 min |
| Alarm response threshold | 0.2 dB/m - 0.3 dB/m |
| Indicator | Red and green LED; standby: green flashes once per minute; alarm: red flashes once per second |
| Coverage area | 20 m² to 40 m² where the room height is under 8 m |
| Power supply | 3V CR123A lithium battery (replaceable) |
| Battery life | 3 year |
| 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; AES128 encryption |
| Operating environment | Indoor |
| Operating temperature | -10°C to +55°C (+14°F to +131°F) |
| Operating humidity | 95% RH (non condensing) |
| Colour and casing | White; ABS |
| Dimensions | 98mm x H43.1mm (3.85" x H1.70") |
| Weight | 140 g (0.30 lb) |
| Installation | Ceiling mount |
| Certifications | TÜV and CE listed; compliance standard EN 14604:2005+AC:2008 |
Works with
Related 868MHz wireless alarm products in our range:
- Dahua DHI-ART-ARC3000H-03-GW2(868) AirShield wireless security alarm kit
- Dahua DHI-ARM320-W2(868) AirShield wireless input expander
Common questions
Does it need mains power?
No. It is powered by a replaceable 3V CR123A lithium battery with a rated battery life of 3 years, and does not require a mains supply.
How loud is the alarm?
The alarm volume is 85dB to 90dB(A) at 3 m, with a visual and audible alarm.
Can I silence it?
Yes. Test and silence share one button, and the silence duration is about 12 min.
How much space does one cover?
Dahua gives a protection area of 20 m² to 40 m² per device where the room height is under 8 m.
How does the wireless link work?
It uses 868 MHz-868.3 MHz two-way communication with frequency hopping and AES128 encryption, up to 1000 m in an open space. Notification can be displayed on the DMSS App in real time.
Is it for indoor use only?
Yes. Dahua lists the operating environment as indoor, at -10°C to +55°C and 95% RH non-condensing, with a ceiling mount, so it is fitted as a ceiling smoke alarm.
Which standard does it meet?
Dahua lists it as TÜV and CE listed, with compliance standard EN 14604:2005+AC:2008.
Full manufacturer specification: Dahua product page
Browse the full Dahua range or contact us on 01902 902251.
Download the Dahua DHI-HY-SA21A-W2 datasheet (PDF).
Supplied by Zenith Security Co, Wolverhampton. We deliver to England, Scotland and Wales, or you can collect from our Wolverhampton trade counter (please call first).
Browse the range: Dahua alarm systems · Dahua cameras.
| Product Code | DHI-HY-SA21A-W2(868) |
|---|---|
| Brand | Dahua |
| Product Type | Intruder & Smoke Alarm |
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