PurpleAir: Real Time Air Quality Monitoring. An air quality monitoring network built on a new generation of "Internet of Things" sensors. A proven air quality monitoring solution for home enthusiasts and air quality professionals alike. Using a new generation of laser particle counters to provide real time measurement of PM1.0, PM2.5 and PM10. PurpleAir sensors are easy to install and only require a power outlet and WiFi. They use WiFi to report in real time to the PurpleAir Map.