HY-SA21A-W2 Wireless Smoke Alarm
- Split-spectrum sensor technology
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Test and silence features in one single button
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Loud sound output: Over 85 dB(A) at 3 meters
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Low power consumption: Minimal quiescent current usage
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Advanced circuit design: Surface-mount device (SMD) PCB
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Low battery warning signal for timely maintenance
Specifications
Working Principle
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Collection Type: Smoke
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Sampling Period: 10 seconds
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Sensor Type: Photoelectric
Alarm
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Alarm Type: Smoke alarm, fault warning, low battery warning
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Alarm Volume: 85dB–90dB(A) at 3 m (9.84 ft)
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Alarm Mode: Visual and audible alarm
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Silence Function: Yes
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Silence Duration: About 12 minutes
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Alarm Response Threshold: 0.2 dB/m - 0.3 dB/m
Basic Parameters
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Indicator Light: Red and green LED indicator
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LED Instructions:
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Standby: Green indicator flashes once per minute
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Alarm: Red indicator flashes once per second
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Fault: Red indicator flashes once per minute
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Low Battery Warning: Red indicator flashes once per minute
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Coverage Area:
- When the height of the space is less than 8 m (26.25 ft), the protection area per device is 20 m²–40 m²
Power Supply
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Battery Life: 3 years
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Operating Voltage: 3V CR123A lithium battery (replaceable)
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Operating Current:
- Monitoring current: ≤ 35µA
- Alarm current: ≤ 35mA
Operating Environment
- Indoor Use
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Operating Temperature: -10°C to +55°C (+14°F to +131°F)
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Operating Humidity: ≤ 95% RH (non-condensing)
Appearance
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Color: White
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Casing Material: ABS
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Dimensions: φ98 mm × H43.1 mm (φ3.85" × H1.70")
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Weight: 140 g (0.30 lb)
Installation
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Mounting Type: Ceiling mount
Certifications & Compliance
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Certifications: TÜV and CE listed
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Compliance Standard: EN 14604:2005+AC:2008
Wireless Communication
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Carrier Frequency: 433.1 MHz–434.6 MHz
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Communication Distance: Up to 1000 m (3280.84 ft) in open space
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Communication Mechanism: Two-way
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Frequency Hopping: Yes
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Encryption Mode: AES128
