Dahua Airshield HY-SA21A-W2 wireless smoke fire detector and siren

Dahua Airshield HY-SA21A-W2 — Wireless Smoke Detector

Environments where safety is a priority require reliable fire and smoke detection. The Dahua Airshield HY-SA21A-W2 wireless detector features a built-in siren that delivers a loud 85-90 dB(A) audible output —perceptible from a distance of 3 meters—ensuring timely warning. Equipped with an advanced photoelectric chamber, it rapidly detects smoke and alerts you via the DMSS app. Operating on the 868 MHz frequency, it ensures stable data transmission, while AES128 encryption protects communication against unauthorized access.

Reliable Detection and Advanced Technology

The detector utilizes split-spectrum sensor technology, which enhances smoke detection accuracy and minimizes false alarms. The photoelectric sensor covers an area of ​​ 20-40 m² with ceiling heights of up to 8 meters, making it ideal for residential spaces or offices. An LED status indicator allows for quick, at-a-glance verification of the device's operational status.

Convenient Operation and Signaling

Ease of use is ensured by a single-button test and silence function, simplifying maintenance and the verification of proper operation. A low-battery alarm notifies you when the power source needs replacing, ensuring continuous, uninterrupted protection. Powered by a CR123A battery with a lifespan of approximately 3 years, it minimizes the need for frequent maintenance.

Stable Communication and Long Range

Two-way communication ensures fast and reliable data exchange. With a range of up to 1,000 meters in an open space, the detector is suitable even for larger buildings. Frequency-hopping technology enhances resistance to interference and ensures stable signal transmission.

Technical Specifications

• Operating frequency: 868.0-868.3 MHz
• Siren volume: 85-90 dB(A) (at 3 meters)
• Sensor type: Photoelectric
• Coverage: 20-40 m² with a maximum room height of 8 m
• Range (open space): up to 1,000 m
• Power supply: CR123A battery (approx. 3-year lifespan)
• Operating temperature: -10 to +55 °C
• Dimensions: 98 x 98 x 43.1 mm
• Material: Plastic
• Encryption: AES128

This smoke detector is the perfect choice for those seeking a combination of reliability, safety, and ease of use.