Fall 2011 Conference
September 21 - 23

Plenary 9: Frederick Doering


Mobile Airborne Particulate Matter Monitor for Cellular Deployment

This project develops an air pollution sensor that quantifies the mass per unit volume of particulate matter having aerodynamic diameters less than 2.5 microns. The sensor uses an air microfluidic channel to filter the particles with a virtual impactor, delivering the small particles to a film bulk acoustic resonator (FBAR) that serves as a mass sensor (the larger particles travel directly to the exhaust port). The rate of resonant frequency decrease of the FBAR is proportional to the mass concentration of filtered particles, allowing us to report on the concentration in the surrounding air.