Simple Air Sensor

**The Simple Air Sensor is an arduino-based prototyping kit for studying air quality.** The SAS is a bare-bones air sensor, roughly modeled off of the [Purple Air]( system. This sensor circuit uses the same type of particle detector as the #PurpleAir sensor, but only one as compared to #PurpleAir's two. It does not include a temperature, humidity and pressure sensor while the Purple Air does. Instead of logging results to the cloud or to the device itself, the Simple Air Sensor displays a red/yellow/green light that illustrates the PM2.5 levels it detects, but it does not convert these results into an Air Quality Index (AQI). This is a version that is easy to assemble (no soldering, just push wires into a breadboard), and it comes pre-programmed. We also offer this kit [assembled and ready to go, straight out of the box]( ""). **Parts List** 1. 1 [Arduino]( 2. 1 [RBG LED Light]( "") 3. 1 [Sensor]( "") with cable[]( 4. 1 [Breadboard]( ## Air Quality Monitoring The Simple Air Sensor can be used: * to see immediate qualitative differences in air quality by displaying a realtime colored light readout. * to examine how the particulate sensor used in the closed source #PurpleAir responds to varying air conditions * to build familiarity with the electronic components used in air sensors without having to program * to use in groups (with 3+ sensors) to plan out placement of a PurpleAir or other more expensive sensor, with consideration for wind direction and spacing, for example. [![55894473-266f0280-5b88-11e9-9714-f945378af5fc.gif](/i/35143)](/i/35143?s=o) **NOTE: The colored light displayed by this sensor is not related to the [Air Quality Index (AQI) colors]( in any way.** #Design Goals Public Lab’s Simple Air Sensor is part of an effort to develop an open source project and community monitoring network that functions similarly to #PurpleAir . Our goal is to create an open-source repository of Purple Air user’s knowledge and expertise regarding installation and troubleshooting, while creating a space for Purple Air users to communicate their findings and organize with others within the air quality monitoring network. In this way, this kit offers an "offramp" from a corporately controlled, closed source project that lacks public forums for asking and answering questions, or for organizing and advocating around the data collected. This project emerged from observations that while many people share an understanding of the importance of "right to know" laws and of the purpose that transparency serves in a society, here is much less awareness of the fragility of technology, and the (inadvertent) gate-keeping role of expertise that leaves people without a pathway to "knowing how they know." This project is part of a long term effort to encourage a culture of empiricism. Quite a few people have built simple open source, Arduino-based devices around the cheap #plantower particulate air sensor [datasheet](, see: * @julieta's work on (and [blog post]( * @guolivar's work: and blog * ## Activities [notes:grid:activity:simple-air-sensor] Add an activity or request an activity guide you don't see listed ## Questions [questions:simple-air-sensor] **** [![IMG_20190304_170244_490.jpg](/i/30002)](/i/30002?size=original) ...

Author Comment Last activity Moderation
silentsairam "Great @warren : My responses, 1. planning the placement of sensors on a site: a) The site can be Indoor places(schools, office or outside space, ..." | Read more » over 3 years ago
mimiss "This could be a great way to plan where to put your Simple Air sensor! You could build a mini model of the area you'd like to study with something ..." | Read more » over 3 years ago
crispinpierce "Hi Jeff (@Warren), I think these transitions are governed by cost, convenience and accuracy. As you know, we're moving in the opposite direction, h..." | Read more » over 3 years ago
nanocastro "hi @warren I really like your setup... it remind me of these cool projects of visualization by Nerea Calvillo" | Read more » over 3 years ago
warren "@molangmuir10 @sadieprego @zengirl2 @nanocastro @mimiss I thought you might be interested in this! " | Read more » over 3 years ago
warren "@crispinpierce @OrionAllgaier I was thinking of how people may bridge from a Simple Air Sensor (or similar) to a Purple Air (#purple-air) or even a..." | Read more » over 3 years ago
exoticbuz "Wow amazing article dear, I found what I was looking for, thanks for sharing this information " | Read more » over 3 years ago
warren "Hi @crispinpierce - that's great to hear about your interest in the SD card logging. I'll see what we can get together. The images showed up perfe..." | Read more » over 3 years ago
crispinpierce "Hi @Warren, Thanks so much for the quick follow up. Here are photos of the unit fully plugged together, showing white after several minutes of warm..." | Read more » almost 4 years ago
exoticirfan "Medicines to get periods " | Read more » almost 4 years ago
warren "Hi, @crispinpierce - can you check that the white connecter is fully inserted? I noticed the white light happens also when that cable comes loose. ..." | Read more » almost 4 years ago
crispinpierce "Thanks @Warren (and @Stevie) for this info. Recently I fully charged the battery bar but after plugging in the "traffic light" sensor, the display ..." | Read more » almost 4 years ago
stevie " I'm not sure the white one is always an error. I've gotten it a couple times between yellow and red. " | Read more » almost 4 years ago
warren "Wow, I wouldn't have guessed that it'd show green with low power (i.e. no reading from the sensor, i'd imagine), so hearing that it turned white in..." | Read more » almost 4 years ago
OrionAllgaier "Hi Stevie, I was was there for that. To the best of my memory the simple air sensor turned on and displayed white light compared to the normal gre..." | Read more » almost 4 years ago
warren "I haven't seen this happen in part because it runs a /long/ time on a battery, but I have seen it when running on a solar panel without enough sunl..." | Read more » almost 4 years ago
stevie "@OrionAllgaier were you there for this? can you shed some more light on what happened? " | Read more » almost 4 years ago
stevie " I recently heard from a community member that "we had another embarrassing moment when the “power bar” battery apparently didn’t have enough energ..." | Read more » almost 4 years ago
warren "OK, update - since the B sensor was covered yesterday, it's now showed as "downgraded" just as the A was yesterday: My question now, is apart fr..." | Read more » almost 4 years ago
warren "OK! After now blocking the B sensor instead, it's accepting A data once more, and hasn't yet flagged the B sensor. Interesting! " | Read more » almost 4 years ago
warren "Aha! One day later, my sensor A has been "downgraded"! I'll move the tape to the other sensor and see what happens. " | Read more » almost 4 years ago
warren "i'll post more soon, but one is now totally blocked and it shows on the graph, but it's not rejecting the data. I'll let this run for a day. Then ..." | Read more » almost 4 years ago
warren "OK, i covered it more thoroughly and will wait a while to report back on what happens. " | Read more » almost 4 years ago
warren " OK testing this out now. Here's our sensor, on Cromwell St at our office:|582421#13/41.81161/-71.41883 Note ..." | Read more » almost 4 years ago