The entire Pixel 9 lineup will feature an ultrasonic fingerprint sensor, according to a report by Android Authority. More specifically, the ultrasonic fingerprint sensor Google plans to use is the Qualcomm 3D Sonic Gen 2 (QFS4008), which is also used on the Galaxy S24 Ultra. All Pixel 9 models will feature the new fingerprint sensor but not the Pixel Fold, which will continue with the power button.
Google currently uses an optical fingerprint sensor for its Pixels. While this does the job it has certain limitations like slow speed, less accuracy, and can easily be affected by any moisture or dirt. Another issue is optical fingerprint sensors not working properly in low-light environments as you won't be able to locate it properly.
Ultrasonic fingerprint sensors are not just faster but safer too in comparison to optical ones. It's also easier to use one in low-light conditions. Most Android flagships and premium mid-range phones offer ultrasonic fingerprint sensors so it makes sense for Google to adopt it for its flagship lineup.
The Pixel 9 series is also expected to feature the new Google Tensor G4 chipset. There's also a new pink colour for the Pixel 9 that was spotted online recently. The addition of a Pixel 9 Pro XL is also something new and major for the Pixel 9 lineup. With less than two months to go for the launch, we should know all about the new Pixels soon.