“Airbeam” by Aircasting (2014)
Aircasting is a company that has developed an end to end system for monitoring, tracking, and displaying data to do with air quality.
The Airbeam uses a laser inside of an air intake chamber to measure how scattered the light becomes by particulate matter. It then analyzes this data, combines it with other data sets being generated, and maps the air quality in the area through a mobile app.
Users can optionally wear a display device that indicates the local quality of air at the time.