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PurpleAir: IoT Sensor Soars To 13,000 feet


Startup PurpleAir makes a living counting dust. Its consumer-level sensors measure particles of dust in air—airborne particulate matter (PM)—using laser particle counters that can count particle sizes 0.3µm up to 10µm. Add power, WiFi, the Internet, and PurpleAir pulls all the data from the devices into an online map showing extremely local air quality around the world, wherever devices a... » read more