guolivar 1 research notes and 1 wiki edits | Joined almost 5 years ago

Problem finder and solver, air quality scientist by day, tinkerer by night and sci-fi fan later in the night! The one and only "El Gus" (or "Gusen" while in the land of the vikings).






Thoughts on Low Cost air quality sensors

by guolivar over 1 year ago | 14 | 2,436 views | 7



How good is the PurpleAir sensor and what does it detect?

Accepted

warren asked about over 1 year ago

Answers

answered on Jan 04, 2018 4

answered on Jan 05, 2018 1

answered on Jan 09, 2018 2

answered on Jan 11, 2018 0

answered on Oct 17, 2018 1

Show all 5 answers »

How big are smoke particles, in microns?

Accepted

warren asked about over 1 year ago

Answers

answered on Aug 30, 2017 1

answered on Sep 01, 2017 1

answered on Sep 30, 2017 1

answered on Sep 30, 2017 1

Show all 4 answers »

Is CALPUFF a good air quality modeling tool

marlokeno asked about over 2 years ago

Answers

answered on Sep 16, 2016 0

answered on Sep 19, 2016 2

answered on Sep 22, 2016 0

answered on Sep 22, 2016 0

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View these maps at MapKnitter.org »

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Comments

Comment Last activity Moderation
" The particle size distribution (mass, volume or number) is very variable and even though "on average" it's fairly stable, the day-to-day variabili..." | Read more » about 1 month ago
"Short answer ... No. Long answer ... Absolutely no! I'll try to explain why, even though it sounds possible, the uncertainties are so large that t..." | Read more » about 1 month ago
" Quickly to your question of: For example, the first 6 are two sets of PM1, PM2.5, and PM10 concentrations. the first set are labeled "standard", w..." | Read more » about 2 months ago
" All the way in New Zealand we also use Gradko for all our passive tubes needs. " | Read more » 3 months ago
" It all depends on what your objectives are. You'll notice that most air quality monitoring stations (the regulatory ones) have wind measurements w..." | Read more » 4 months ago
"Following on @jeffalk answer, please expand on your question. In my opinion (and I've worked in aerosol science for a number of years) the main poi..." | Read more » 6 months ago
"As far as I know Plantower hasn't disclosed that (to be fair, I don't think any of the low-cost manufacturers has done either). From the field test..." | Read more » 6 months ago
"Here is a page about the PMS5003 and 7003 ... https://aqicn.org/sensor/pms5003-7003/ The difference seems to be in their internal layout. In that ..." | Read more » 7 months ago
"I'll try to unpack a couple of things here. The use of zero filters is standard practice as a quick check of particle instruments. It is used to t..." | Read more » 9 months ago
"I'm sorry, this got buried in my inbox ... I don't even remember seeing a notification about the original question! The short answer is that I don'..." | Read more » 11 months ago
"Great work @sagarpreet! This might get rambly because there is no right answer but I'll try to explain why and what then. The first thing you nee..." | Read more » 11 months ago
"The description of the operating principle can be misleading. Optical particle measurements rely on intensity of scattering rather than "amount of..." | Read more » about 1 year ago
"Some colleagues from Australia have been working on AirRater (https://airrater.org/) and we're working towards adapting it for specific projects. I..." | Read more » about 1 year ago
"I tried to put a long answer here but it kept throwing errors so I wrote a note with my thoughts on this issue: https://publiclab.org/notes/guoliv..." | Read more » over 1 year ago
"Smoke particles (and by smoke I mean combustion products) come in sizes all the way down to 1nm (0.001micron) and in shapes that make it very trick..." | Read more » over 1 year ago
"You're right, the effect of humidity would be to change the "apparent" size but it's not just increasing the number of particles that now fall in t..." | Read more » almost 2 years ago
"Yes, environmental conditions do affect the ability of an optical sensor, not too much to "see" a particle but rather to "size" it. All of these o..." | Read more » almost 2 years ago
"The question if "which model is best" is not easy to answer as it is always dependent on what the results are used for. There have been a few studi..." | Read more » over 2 years ago
"Hi there @tomtobback ! Just to clarify ... I'm in no way associated with the DustDuino team ... I'm just a "concerned citizen" ;-) I am an air qu..." | Read more » over 3 years ago
"You first need to remember that PM10 and PM2.5 are measures of "mass" of particles in the air (micrograms/m3) while P1 and P2 give "counts" per vol..." | Read more » over 3 years ago

guolivar was awarded the Basic Barnstar by warren for their work published in Thoughts on Low Cost air quality sensors.



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