Google Opens Fitbit Air CAD Files, Recommends 35 mmHg Sensor Pressure for Custom Bands
Updated
Updated · 9to5Google · Jun 2
Google Opens Fitbit Air CAD Files, Recommends 35 mmHg Sensor Pressure for Custom Bands
3 articles · Updated · 9to5Google · Jun 2
Summary
Google published Fitbit Air hardware specifications and 2D CAD drawings, giving independent designers and makers the dimensions needed to build custom bands and accessories.
The release covers the pill-shaped tracker pebble and the sleeve used by the Performance Loop Band, including mating dimensions, tolerances, and attach-detach force specs for the snap-in mechanism.
Google says bands should keep the heart-rate and SpO2 sensors unobstructed and maintain steady skin contact, with a recommended minimum pressure of 35 mmHg, or 0.68 psi, during motion.
The guidance also sets material, chemical, environmental, and testing requirements to reduce skin irritation and keep accessories secure during rigorous movement.
Google framed the move as a response to user experimentation since Fitbit Air launched last month, expanding information usually reserved for third-party accessory companies.