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WisuAlarm HY-BD1 Fire Linear Beam Detector CPU type_AMD Ryzen 7 Yealink CP935W 1-year AMS ExtendedWisuAlarm HY BD1 Fire Linear Beam Detector Fire alarm infrared beam smoke detector is a reflective linear infrared beam smoke detector. The beam detector determines whether to output an alarm signal based on the attenuation of smoke on the optical path. When there is a lot of somke which is full of the space, it will make the IR light path to refraction, so that triggering the somke alarm from beam smoke detector. It can cover a large space, and