Dahua Airshield HY-GC21B-W2(868) wireless CO detector

DHI-HY-SA21A-W2(868) Wireless smoke detector The Dahua Wireless Smoke Detector provides battery-powered smoke detection and alarm functions within a single unit. Advanced electronics combined with a photoelectric smoke detection chamber provides early detection of smoke and high immunity to unwanted alarms. This type of smoke detector does not require mains power and is suitable for general residential applications. Timely notification of the smoke detector can be displayed in real time on the DMSS app. Specificaties: Working Principle Collection Type - Smoke Sampling Period - 10 s Sensor Type - Photoelectric Alarm Alarm Type - Smoke alarm, fault alarm, low battery warning Alarm Volume - 85dB-90dB(A) at 3 m (9.84 ft) Alarm Mode - Visual and audible alarm Silence Function - Yes Silence Duration - About 12 min Alarm Response - Threshold 0.2 dB/m - 0.3 dB/m Basic Parameters Indicator Light - Red and green LED indicator Led Instructions - Standby: Green indicator flashes once per minute Alarm: Red indicator flashes once per second Fault: Red indicator flashes once per minute Low battery warning: Red indicator flashes once per minute Coverage Area -When the height of the space is less than 8m (3.28 ft), the protection area of a device is 20 m2 -40 m2 Power Supply Battery Life - 3 year Operating Voltage - 3V CR123A lithium battery (replaceable) Operating Current - Monitoring current: ≤ 35uA Alarm current: ≤ 35mA Operating Ambient Operating Environment - Indoor Operating Temperature - -10°C to +55°C (+14°F to +131°F) Operating Humidity - ≤ 95% RH (non-condensing) Appearance Color - White Casing - ABS Dimensions - φ98mm × H43.1mm (φ3.85" × H1.70") Weight - 140 g (0.30 lb) Installation - Ceiling Mount