The PA-II is an air quality sensor that measures real-time PM2.5 concentrations for residential, commercial, or industrial use. Built-in WiFi enables the sensor to transmit data to the PurpleAir map, where it is stored and made available to any smart device.
Full specs on the PurpleAir website.
PurpleAir PA-II (Purchase Your Own)
By selecting this product, the Tomorrow Foundation will purchase one or more PurpleAir PA-II air quality sensors on your behalf. The sensor will be yours to keep and use as you see fit. You will not receive a charitable tax receipt.
Available on backorder