Dahua HY-SA21A-W2(868) Wireless Smoke Alarm
€83.08
Product "Dahua HY-SA21A-W2(868) Wireless Smoke Alarm"
Dahua HY-SA21A-W2(868) is a wireless optical smoke detector that links to the AirShield alarm system over 868 MHz. Its split-spectrum sensor detects both fast-flaming and smouldering fires; on smoke, fault or low battery it triggers an 85 dB siren and LED alert and reports to the hub.
Key Advantages and Features:
- Optical smoke detection: Split-spectrum sensor, air sampling every 10 s
- Wireless 868 MHz: AirShield two-way link, AES-128 encryption
- Loud alarm and LED: 85–90 dB(A) siren and visual LED alert
- System integrated: Notifications to the hub and DMSS app
- Replaceable battery: CR123A, up to ~3 years life
- Test & silence button: One-button test and ~12 min silence
Technical Specifications:
| Parameter | Specification |
|---|---|
| Sensor type | Optical (photoelectric), split-spectrum |
| Alarm types | Smoke alarm, fault alarm, low-battery warning |
| Sound level | 85–90 dB(A) at 3 m |
| Coverage area | 20–40 m² (ceiling height below 8 m) |
| Sampling period | 10 s |
| Wireless link | 868 MHz AirShield, two-way, AES-128 |
| Range (open space) | Up to 1000 m |
| Battery | CR123A 3 V, up to ~3 years life |
| Operating temperature | -10 °C to +55 °C |
| Dimensions | Ø98 × 43.1 mm |
Best suited for: AirShield alarm-system users who want to add a wireless smoke detector and receive fire alerts directly on the hub and mobile app.
| Alarm device type: | Siren |
|---|---|
| System: | Wireless |
Dahua Technology – Enabling a Safer Society and Smarter Living
Dahua Technology is a world-leading video-centric AIoT (Artificial Intelligence of Things) solution and service provider. Dedicated to technological innovation, Dahua offers reliable security systems and smart video solutions tailored for residential users, commercial enterprises, and the public sector alike.
Why Choose Dahua?
Cutting-Edge Innovation: Dahua invests heavily in Research & Development (R&D) each year, consistently bringing highly accurate AI-driven video surveillance technology to the global market.
Comprehensive Security Ecosystem: Their extensive product portfolio includes high-resolution IP and analog cameras, smart video recorders, access control systems, video intercoms, intrusion alarms, and smart home solutions.
Proven Global Reliability: Trusted in over 180 countries, Dahua products are renowned for their exceptional build quality, outstanding image clarity, and user-friendly operation.
Through continuous innovation and world-class video technology, Dahua helps create a safer environment and streamlines daily operations for businesses and communities worldwide.
Videovalve is Dahua's official distributor in Estonia. See Dahua's official partner list (dahuasecurity.com)
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