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A battery‑powered wireless smoke detector with a high‑sensitivity photoelectric sensor, loud 85 dB alarm, easy test/silence button, long battery life, and secure two‑way wireless communication for flexible installation without complex wiring.
Advanced smoke detection: Split‑spectrum photoelectric sensor for rapid and accurate detection with fewer false alarms.
Powerful alarm: Loud audible output ≥ 85 dB at 3 m and visual LED indicators.
Long battery life: Up to 3 years on a replaceable CR123A battery.
Wireless operation: Two‑way communication with frequency hopping and AES‑128 encryption, up to ~1000 m (open space).
Easy use: Single button for test and silence functionality.
Installation: Surface/ceiling mount with compact design.
Certifications: Complies with EN 14604 and has TÜV/CE safety listings.
The DHI‑HY‑SA21‑W2 is a wireless smoke alarm that provides reliable early detection of smoke in indoor spaces without needing hard‑wiring. It uses advanced split‑spectrum photoelectric sensor technology to detect smoke quickly and reduce false alarms. The unit has a loud built‑in alarm (85‑90 dB at 3 m) and a single button for testing and silencing nuisance triggers. Powered by a replaceable 3 V CR123A lithium battery with up to 3 years of life, it’s low‑power and easy to install on ceilings. The device also offers two‑way wireless communication with frequency hopping and AES‑128 encryption, enabling it to connect with other alarm modules in a system over distances up to about 1000 m in open space. It features visual LED indicators, low‑battery warnings, and meets European safety standards (EN 14604 and TÜV/CE listed).
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