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.
With the name of the gaming being coverage area, taking note of a device’s range is important. Depending on the size of your home and property, you may only need up to 1,200 square feet of coverage. But those with larger homes will want to spring for an extender that can support upwards of 2,000+ square feet of coverage.
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