What is a PurpleAir sensor?
PurpleAir sensors are an “Internet of things” (IOT) air quality sensor or particulate sensor consisting of a network of elements. Laser Particle Counter: PurpleAir uses PMS5003 and PMS1003 laser particle counters. These sensors count suspended particles in sizes of 0.3, 0.5, 1.0, 2.5, 5.0, and 10um.
Can you download PurpleAir data?
From the PurpleAir map, click the download button in the bottom right corner after selecting an area of interest. Or click on a sensor on the PurpleAir map, then mouse over the ‘Get this widget’ link. A download link will then be displayed for that individual sensor.
How many PurpleAir sensors are there?
Purple Air has two sensors, which are both graphed on the timeseries. If the sensors are reading differently, very low, or very high, then one or both may be broken. You can see current air quality data on our website.
Where do PurpleAir sensors come from?
Users of PurpleAir can toggle between real-time data and readings averaged over the last 10 or 30 minutes. The data comes from the commercial sensors the company sells, which members of the public install on porches, yards and other neighborhood sites.
Is there an app for PurpleAir?
Although PurpleAir currently does not have an app, there is a free iOS app called Local Haze which supports PurpleAir’s monitors. The app detects the nearest sensor to you and displays some basic data for the PM2. 5 concentration in real-time.
How good is PurpleAir?
For the national data set of sensors collocated with regulatory-grade monitors, results show that PurpleAir sensors, when corrected, accurately report NowCast AQI categories 90% of the time as opposed to uncorrected PurpleAir data, which are accurate only 75% of the time.
Does PurpleAir have an API?
PurpleAir provides access to our real time data in a JSON format. … Accessing data directly from Thingspeak: Another way to get the data is to use ThingSpeak.com and to do this, you will need the API Key and channelID.
How do I get a PurpleAir API key?
Documentation is at https://api.purpleair.com and please email [email protected] for keys if you want to play. It includes a cool “groups” feature where you can create your own lists of sensors that you are interested in.
What does Lrapa mean on PurpleAir?
LRAPA PurpleAir Monitor Correction Factor History. In 2017 Lane Regional Air Protection Agency (LRAPA) began investigating the idea of using low-cost particulate matter (PM) sensors to supplement our PM2. 5 monitoring network and as a possible tool for use by citizens concerned about the PM levels in their neighborhood …
What AQI is unhealthy?
An AQI over 150 is considered unhealthy for the general population. AQI over 101 can be unhealthy for sensitive groups and some workers with asthma and other conditions may feel unhealthy when the AQI is below 150.
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Why are PurpleAir and AirNow so different?
Why does the AirNow Fire and Smoke Map look different than the PurpleAir Map? … AirNow identifies potentially malfunctioning sensors based on a comparison of readings from the two fine particle sensors each PurpleAIr sensor contains, or from user reports.
How do you reset PurpleAir?
There is not a button to reset the WiFi network connection. To make the sensor network, AirMonitor_xxxx, visible again you will need to turn off the WiFi network or take the sensor out of range of the WiFi network the sensor is currently configured to.
Why should I buy a PurpleAir sensor?
Real-time air quality monitoring for people who care about the air. PurpleAir makes sensors that a community of citizen scientists use to collect hyper-local, real-time air quality data and share it on a map that is accessible to everyone.
Do PurpleAir sensors measure temperature?
The PurpleAir counts the numbers of particles in several size classes and converts them to estimates of mass concentration. In addition to PM2.5 and PM10, the PurpleAir reports the concentration of particles less than 1.0 µm in diameter, called PM1.0. The PurpleAir also measures temperature and relative humidity.
Why are PurpleAir readings higher?
Smoke pollution requires an adjustment on the PurpleAir app for accurate readings. Adrian Dybwad, founder of Purple Air, explained to UC Berkeley computer science Prof. Josh Hug that because wood smoke particles are less dense (1.5 g/cm³) than typical PM 2.5 particles, the resulting AQI values spike too high.