[andor]

The particulate sensor on my Xiaomi air purifier correlates really well with the numbers from my city's air quality network.

What doesn't work well for me is the auto mode, it barely does anything at less than 50µg/m^3, way too high even for the mediocre air in my area. So instead I use automation in their app to let it run at full speed for 30 or 60 minutes.

[5e92cb50239222b]

They use Chinese air quality standards, which are very high relative to most other countries for (probably) obvious reasons.

https://en.wikipedia.org/wiki/Ambient_air_quality_criteria