Question: Where can I find good low-cost air quality sensors?

mgoodwin is asking a question about air-quality
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by mgoodwin | April 01, 2020 20:49 | #23277

I work with community groups that are frequently looking to measure air quality - most often particulate matter. What sensors are recommended? (The lower the cost, the better.) Use may be for indoor or outdoor monitoring.


We use purple air monitors. You can find them at

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I wanted to share this research note from @jiteovien on how to evaluate low cost air monitors.

I've also been looking into this Pocketlab air sensor myself, but haven't had the time to test one yet.

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Hi! The EPA also has an Air Sensor Toolbox here:

Someone mentioned the PurpleAir, there's more info on that tool here:

There's also a lot of info about PM on the PM wiki page:

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