Laser Egg air quality meter?

[Thomas Crawford]

Anyone tried the Laser Egg? Can get it on Ebay for <$100.

Here is a review:
https://smartairfilters.com/en/blog/how-accurate-are-common-particle-counters-comparison-test/

Seems like it can give readings on >0.3um and >2.5um. Plus temp and humidity and a cute name.

[David L Morse]

You can find more evaluation data on that and many others here (http://www.aqmd.gov/aq-spec/evaluations/summary-pm).

[Thomas Crawford]

Thanks David.

The Laser Egg has great correlation to $20k+ meters at partical sizes 2.5um and smaller. (R^2 of >0.85). It tends to slightly overestimate the peaks. It's very close to the Dylos 1100. I'd rather have something that slightly overestimates.

The correlation to sizes 10um and larger is not great, it tends to completely miss the peaks. The reviews are average.

I'll probably just try to pick up a used Dylos.

[David L Morse]

Actually, that's a Dylos 1700 they're comparing. The 1100 doesn't give you PM2.5 and PM10 readings, only particle counts.