Air Sensors
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](https://www.epa.gov/sites/production/files/2016-06/documents/air_sensors_webinar_slides_06-29-16.pdf) from an EPA [Air Quality Monitoring and Community Science webinar](https://www.epa.gov/sites/production/files/2016-06/documents/air_sensors_webinar_slides_06-29-16.pdf) 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](http://tdenviro.com/wp-content/uploads/2017/09/4-questions-when-buying-air-sensors.pdf)” neatly summarizes what to consider when choosing an air sensor. + [Snuffle.org](http://www.snuffle.org/): lots of information on low-cost sensors for various air pollutants. + [Air Quality Sensor Performance Evaluation Center (AQ-SPEC)](http://www.aqmd.gov/aq-spec/evaluations): 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](https://www.epa.gov/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
asampra "I did this! Don't forget the springs. There are 3 sizes and four springs. So far the device corresponds to a duplicate system. Was reading very ..." | Read more » over 4 years ago
566303 "We are having some issues with our sensor. It does turn green around clean air, but it only turns blue around unclean air (smoke, etc.), not red or..." | Read more » over 4 years ago
justcare "Thank you for sharing useful information. " | Read more » over 4 years ago
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liz "Wow this is awesome! Thank you for these contributions @wu_ming2 " | Read more » over 4 years ago
wu_ming2 "I just updated https://repo.or.cz/purpleair-notify.git It's a complete re-write adding Discord !start and !stop commands. Also: messages if Pur..." | Read more » over 4 years ago
alexandretrio1992 "Hi I think we can detect Ethylene Oxide through air quality sensor, but i am not sure how effective it is, but I am sure some gas detectors will de..." | Read more » over 4 years ago
gccummings25 "Thank you for your response! You're right in that I need to refine the logistics and parameters. There's no real budget, but because I'm a student ..." | Read more » over 4 years ago
nshapiro "Hi Grace, Glad you are bringing attention to this issue! I was unaware of this until an attorney friend in ATL forwarded this story to me the other..." | Read more » over 4 years ago
natevw "Nice kit! Main constructive feedback I would offer is that the cable that came ahead of the "Make" livestream event would have been hard to breadb..." | Read more » over 4 years ago
warren "That's awesome, we'd love to see it in a post on PublicLab.org if you're interested in sharing! " | Read more » over 4 years ago
wu_ming2 "If anyone is interested I have completely re-written the micro-service that notifies you while a sensor PM2.5 reading crosses a threshold. With s..." | Read more » over 4 years ago
panicpuri "I have worked with If-This-Then-That (IFTTT)* systems in the past, and they were simple, yet effective. A system that routinely sends text message ..." | Read more » over 4 years ago
liz "wow great to hear and thanks for the timeline update! We're cheering for you and the team. What system are you thinking about for "prompts and remi..." | Read more » over 4 years ago
panicpuri "Things are advancing (although a bit slower than I hoped, but I guess that's to be expected). I am still designing a plan for the entire system (in..." | Read more » over 4 years ago
liz "How are things advancing? Quite well, i hope! " | Read more » over 4 years ago
eustatic "Perhaps that's easy for me to say, since i work not for the university, but for a membership based organization where the dues paying members influ..." | Read more » over 4 years ago
eustatic "I think you could find residents who want to participate, and could double as field inspectors for your units, if you got them on board to install ..." | Read more » over 4 years ago
panicpuri "Thank you for your response, @cfastie ! The SensorShip looks like a really interesting device and I will definitely consider using that in a part o..." | Read more » over 4 years ago
joyofsoy "We shared this on Public Lab's social media. The Facebook post received this reply: Is there already a community of folks interested in collecting ..." | Read more » over 4 years ago
liz "Fascinating! " | Read more » over 4 years ago
cfastie "It looks like you have made a really good start with this project. I agree that a challenge will be to avoid scaring away the neighborhood resident..." | Read more » almost 5 years ago
david_uwi "I am in Trinidad and Tobago. I have located the sensor outside, but sheltered from the weather. I am towards the eastern side of Trinidad and with ..." | Read more » almost 5 years ago
liz "Where is this sensor located? " | Read more » almost 5 years ago