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Table 2 Comparison of outdoor PM2.5 measurements taken by AirBeam sensors vs. time-matched measurements taken by nearby EPA monitors

From: Feasibility and acceptability of monitoring personal air pollution exposure with sensors for asthma self-management

  AirBeam EPA-55 EPA-57 EPA-76
Federal equivalent method No Yes Yes Yes
Measurement method Optical sensor Beta attenuation monitor Beta attenuation monitor Beta attenuation monitor
Measurement interval 1 s 1 h 1 h 1 h
Number of measurements 117,510 52 41 42
PM2.5, μg/m3, mean (range) 6.8 (0.6, 97.6) 10.3 (2.9, 22.6) 7.1 (0, 11.9) 9.2 (0.1, 19.7)
Data missingness, % 0 1.8 22.6 20.8