Particulate matter sensors

Commercial off-the-shelf monitors

For indoor residential use:

• reviews at: https://breathesafeair.com/air-quality-monitors/#Best_Indoor_Air_Quality_Monitors
  • AirGradient ONE — Open-source. Pretty affordable, if you can plug a few pieces together. $140
  • Qingping Air Monitor Lite   [amazon] — Most bang for the buck. It has an 8-hour battery, which isn't much compared to most portable monitors, but I personally consider it "minimally portable". $75 minus a $15 coupon
    • the app gets very low reviews
  • Air-Q Basic — Very expensive, but also highly rated. 410 €   (a little less than $500)
  • Atmotube Pro — Portable. $250
• reviews at: https://www.consumerreports.org/home-garden/indoor-air-quality-monitors/c200861/
  • Airthings View Plus 2960 — Clearly the top-ranked by ConsumerReports and by Amazon reviewers.
  • uHoo Smart Air Quality Monitor UHO-OT-000001
  • Temtop Air Quality Monitor M100-US — Cheap, but maybe not too bad?
• list at: https://housefresh.com/air-quality-monitors/
• list at: https://www.nytimes.com/wirecutter/reviews/best-home-air-quality-monitor/

For indoor industrial use:

• https://www.plymovent.com/us/products/smart-solutions/aeroguard-industrial-air-quality-monitor
• list at https://www.reddit.com/r/AirQuality/comments/1inbc5r/accurate_commercial_air_quality_monitoring/ (woah, those are way beyond my price range)
• list at https://sperdirect.com/collections/indoor-air-quality
• background info: https://learn.kaiterra.com/en/resources/types-commercial-air-quality-monitors

Considerations

• VOC is always going to be inaccurate at this price.
• PM10 is always going to be inaccurate at this price.