We measure indoor air quality by a sensor known as Laser Eggs. They monitor air quality based on a measurement called the Air Quality Index (AQI). This is an automated device which converts the concentration of dust particles in to the digital reading that is displayed in the screen. It measures the air quality in particulate matter 2.5 (PM 2.5). The Laser Egg was selected for this citizen science project because of its affordability, user-friendly interface, and real-time data display on the Laser Egg sensor, as well as a built-in application that can be accessed easily through a download on a smart device.

For outdoor air quality purple air air monitors are used. Purple air sensors are automated laser particle counters that enumerate particles causing air pollution. It counts the particles between 0.3µm to10 µm in diameter presents in air which help us to find the level of pollution in the respective locality. As a part of DEMP initiative, we are using the outdoor purple air monitor to find out the level of pollution in urban cities like Bhairahawa and Butwal. The data are automatically uploaded in the purple air site which could be downloaded for further scientific study and analysis.