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A comment on Build a do-it-yourself home air purifier for about $25. Parent comment
They are hard to find and buy in the US, but very popular in China where many cities have major air quality issues. I picked one up on ebay.
Most of these consumer-grade PM2.5 monitors seem to use the same basic laser scatter sensor that measures 0.3um+ particles.
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They are hard to find and buy in the US, but very popular in China where many cities have major air quality issues. I picked one up on ebay.
Most of these consumer-grade PM2.5 monitors seem to use the same basic laser scatter sensor that measures 0.3um+ particles.