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A comment on Build a do-it-yourself home air purifier for about $25.

Re:Build a do-it-yourself home air purifier for about $25 by peepopeep on Tuesday November 13, 2018 @06:40PM (#18445938)
I was looking up air quality monitors but can't seem to find any on amazon with a calibration certificate that will accurately measure 0.3 micro particles. Am I the only one who thinks this is a great opportunity for a smart product with an app that has the features of a professional air quality monitor and simple UI / UX? If such product exists, does anyone know where I can find it?
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Re:Build a do-it-yourself home air purifier for about $25 by pwarner on Tuesday November 13, 2018 @06:49PM (#18445992)
https://www.purpleair.com/ seems to work great for me!
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Re:Build a do-it-yourself home air purifier for about $25 by peepopeep on Tuesday November 13, 2018 @06:59PM (#18446049)
Can the sensor be used indoors or does it have to be their "indoor sensor"? The products look interesting but the site does not inspire confidence.
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Re:Build a do-it-yourself home air purifier for about $25 by pwarner on Tuesday November 13, 2018 @08:15PM (#18446521)
Their site is simple but it works great. I "installed" my outdoor sensor by laying it on my desk inside and plugging it in. Will move outside when fires end.
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Re:Build a do-it-yourself home air purifier for about $25 by jryan49 on Tuesday November 13, 2018 @07:48PM (#18446358)
I'm using their indoor sensor, works well
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Re:Build a do-it-yourself home air purifier for about $25 by jly on Wednesday November 14, 2018 @11:27AM (#18451067)
I bought one of these earlier this year: https://kaiterra.com/products/laser-egg-2-plus/

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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Re:Build a do-it-yourself home air purifier for about $25 by io_io on Tuesday November 13, 2018 @06:45PM (#18445966)
With the recent California fires, I've been looking for a decent option. Unfortunately the Elgato Eve sensor is no longer sold, and the few other consumer products still hover in the $100+ range with poor reviews.

PurpleAir sells an indoor sensor, but it appears to be limited release and somewhat 3D printed. https://www.purpleair.com/

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Re:Build a do-it-yourself home air purifier for about $25 by pat2man on Wednesday November 14, 2018 @12:17AM (#18447688)
The new version of the Eve Room sensor seems to be out: https://www.amazon.com/Elgato-10EAM9901-Generation-Technolog...
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Re:Build a do-it-yourself home air purifier for about $25 by lprd on Wednesday November 14, 2018 @04:42AM (#18448664)
How does Eve Room compare to the Netatmo Home Coach?
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Re:Build a do-it-yourself home air purifier for about $25 by mmagin on Tuesday November 13, 2018 @06:58PM (#18446045)
Having both, I'd say that the indoor sensor is not worth it. It doesn't have both sensors so it isn't equipped to test them against each other. I do like the outdoor sensor though.
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Re:Build a do-it-yourself home air purifier for about $25 by peepopeep on Tuesday November 13, 2018 @06:59PM (#18446053)
What are you using for indoors?
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Re:Build a do-it-yourself home air purifier for about $25 by ip26 on Tuesday November 13, 2018 @07:35PM (#18446277)
I don't know about 0.3 micron, but all the different sizes tend to come together. Presence of PM2.5 implies PM0.3

I've got a foobot, I like it. It was benchmarked by some gov't agencies and found to track pretty well.

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Re:Build a do-it-yourself home air purifier for about $25 by wildfire_smoke on Tuesday November 13, 2018 @10:12PM (#18447160)
Just got one of these - seems to correlate pretty well with the airnow.gov outdoor measurements https://shop.hellowynd.com/
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Re:Build a do-it-yourself home air purifier for about $25 by zzzcpan on Tuesday November 13, 2018 @07:20PM (#18446183)
Why do you need an accurate measurement for consumer air quality monitoring? I believe even a DIY arduino project with cheap optical dust sensor, like PPD42NS or GP2Y1010AU0F, would be enough.
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Re:Build a do-it-yourself home air purifier for about $25 by blattimwind on Tuesday November 13, 2018 @07:59PM (#18446436)
Why use a measurement device at all? Your nose is quite good enough, as long as it's neither clogged nor "calibrated" to city air. Putting a dust mask with a P3+carbon filter on for an hour or so tends to fix the latter.
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