encounter in the UK for example, are the same as the Diebold 1000 series in the
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范冰冰奪最佳女主角：致辭感謝台灣金馬獎「始終如一支持華語電影人初心」2025年11月22日
Optical-based smoke alarms use light instead. They are slightly better at detecting the large smoke particles created by slow, smouldering fires. When such particles enter a chamber in the device, they scatter light from a small light source, which is then picked up by a photoelectric sensor.