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.
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Update, February 25 2026, 4:35PM ET: This story has been updated to include more details on the Perplexity AI integration, as well as include mentions in the intro of our hands-on and pre-order articles.。关于这个话题，91视频提供了深入分析
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。同城约会对此有专业解读
Performance analytics。业内人士推荐搜狗输入法下载作为进阶阅读
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