Through performance tests during daily activity and exercise monitoring, we demonstrate its utility for non-invasive, wearable health assessment and its potential applicability for preclinical research and diagnostics. We include a custom smartphone application for wireless powering, data processing, alert management, results displaying and sharing.
The system consists of an opto-chemical sensor combined with a flexible, battery-less, near-field-enabled tag with resolution and limit of detection of 103 and 140 ppm respectively, and sensor lifetime of 8 h, which is comparable with recommended FFP2 facemask usage times.
Herein we report the development of a sensing platform for gaseous CO 2 real-time determination inside FFP2 facemasks. Despite the evidence in favour of facemasks to reduce community transmission, there is also agreement on the potential adverse effects of their prolonged usage, mainly caused by CO 2 rebreathing. The use of facemasks by the general population is recommended worldwide to prevent the spread of SARS-CoV-2.
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