I was hoping someone who knows more about how these sensors work could help me. I have my Purpleair sensor installed and it's been working great, but there are active wildfires in my area (Southern California). When outside you can easily smell smoke but my purpleair sensor along with at least 50+ others in the area are all reading below 10 AQI. The aqmd.gov website states "In any area where you can see or smell smoke, everyone should avoid vigorous exertion and limit outdoor exposure."
Why is it that I can smell smoke but all the purpleair units are showing the air is the cleanest it's been all year?