Nest was founded five years ago with a smart home heating and air conditioning thermostat, but now is trying to create a universe of smart home products that work with each other and with devices from other manufacturers. Google bought the company last year for $3.2 billion.
At a press conference in San Francisco, Nest introduced a second-generation Nest Protect smoke and carbon dioxide detector with a new dual sensor system that can alert users to both slow- and fast-burning fires.
The new, smaller Protect is also supposed to cut down on the false alarms that customers said plagued the first-generation version. Nest recalled detectors last year because of a glitch that potentially delayed the alarm sounding. It also had to update the software because the device had trouble telling the difference between steam and smoke.
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