Air Sensors

## Choosing Sensors Often the first step is to look for a sensor for what you're hoping to measure. In the community posts below, we're collecting info on different kinds of air quality sensors, and their: * cost * sensitivity/accuracy * links and documentation Can you afford a sensor? Can it detect what you're looking for? Where can you learn more about it? ### Posts about choosing and evaluating an air sensor [notes:grid:air-sensor-eval] ### Expected ranges and useful detection limits for pollutants of interest This [table]( from an EPA [Air Quality Monitoring and Community Science webinar]( lists the six criteria air pollutants and a couple additional pollutants, with background levels you might see in the environment in the “Range to Expect” column and useful detection limits for sensors. **** ## Wikis about air sensors [wikis:air-sensors] ## Air sensor projects Public Lab pages and posts tagged `air-sensor-projects` will appear here [nodes:air-sensor-projects] ## Questions [questions:air-sensors] ## Further reading and resources + Environmental consultant Tim Dye’s “[4 questions to ask before buying an air quality sensor](” neatly summarizes what to consider when choosing an air sensor. + []( lots of information on low-cost sensors for various air pollutants. + [Air Quality Sensor Performance Evaluation Center (AQ-SPEC)]( from the South Coast Air Quality Management District, this program tests and evaluates air sensors “in the field, under ambient conditions, and in the laboratory under controlled environmental conditions.” + [Air Sensor Toolbox]( from the US Environmental Protection Agency, this toolbox includes guidance on how to use air sensors and their data, plus information on sensor performance and evaluation results. ...

Author Comment Last activity Moderation
warren "Just noting also a big round up of notes on humidity and fog with optical sensors here:" | Read more » about 2 years ago
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bhamster "Thanks so much for your reply, Chris. I might give the build a try in the future, and in the meantime will dig around a bit more for existing infor..." | Read more » almost 3 years ago
cfastie "I have not used a CCS-811 VOC sensor outdoors. That's mostly because I live in the woods in Vermont and the data would be boring. However the senso..." | Read more » almost 3 years ago
eustatic "thanks for any answers! " | Read more » almost 3 years ago
bhamster "@cfastie @sarasage The conversation you had in the comments of this post mentioned above was very helpful. Do you happen to have any updates from t..." | Read more » almost 3 years ago
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liz "Hi @Katie, i believe we have done something related, but not exactly what you are inquiring about. We have used video interviews to learn how peopl..." | Read more » over 3 years ago
Ag8n " The only other thing to point out- all these calculations assume the particles are spheres. We had particle surface area measuring equipment. T..." | Read more » over 4 years ago
wu_ming2 " I believe your first question was answered in general terms here:" | Read more » over 4 years ago
warren " @nanocastro @cbarnes9 @ag8n @wu_ming2 @bigmit37 might also know a bit about this? " | Read more » over 4 years ago
stevie " Hi all, great questions here. Pinging in a couple people who might be able to help provide some insight @cfastie @guolivar Best, Stevie " | Read more » over 4 years ago
jeffalk " Hi @OrionAllgaier, It's great to be curious and I'm sorry I can't answer your questions. But I am also curious. To my mind if one is trying to pr..." | Read more » over 4 years ago
midol "some PMS5003 distributors specify that Mie scattering is used " | Read more » over 4 years ago
guolivar " 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 » over 4 years ago
Ag8n " Normally, in an open location, the national weather service (NWS) wind direction would be ok. But as you get into more urban locations, where bu..." | Read more » over 4 years ago
Ag8n "Please look at the data sheet for the purple air sensors. Specifically, the r2 data for the pm1.0, pm2.5, and pm 10. At least in the medical fiel..." | Read more » almost 5 years ago
warren "Just as we're speaking, @cfastie posts :smiley: ! " | Read more » almost 5 years ago
warren "@Cbarnes9 are you at all interested in something like this, where it'd be a PMS7003 connected to an Arduino to just get the data off as quickly as ..." | Read more » almost 5 years ago
warren "I agree, i think it's laser scatter -- you can read @guolivar's post here for a bit more!" | Read more » almost 5 years ago
warren "Hi! I had to look up "adsorb" -- (it means accumulating on the surface rather than interior) but that makes sense -- basically @guolivar, you're sa..." | Read more » almost 5 years ago
Cbarnes9 "Hello everyone, sorry for the late replies; I am posting the field study results from AQMD that I was referencing. Their tests indicate that the PM..." | Read more » almost 5 years ago
jeffalk "@cfastie is certainly correct in his comments that each of the purple air devices reads, in general, higher than the Grimm. (Almost all slopes (coe..." | Read more » almost 5 years ago
cfastie "The field evaluation report linked above includes 78 graphs comparing the results of a Purple Air sensor with a $25k GRIMM optical particle counter..." | Read more » almost 5 years ago