AMI

Aerosol Mobility Imaging

What it Does:

AMI is a instantaneous electrical mobility particle sizing system, providing high-resolution, 1-sec size distribution measurements for particles between 10 nm to 300 nm in diameter.

Objectives:

Objectives are to provide rapid measurements, such as for aircraft studies, and to speed measurement of particle hygroscopicity.

How it Works:

AMI separates particles based on electrical mobility, then enlarges the particles along their flow trajectories, and photographs them. Images of particle positions within the gap , after mobility separation and condensational growth, are captured by a digital camera operating at 10 frames/sec. The images are analyzed to give the position, and hence mobility size, of each particle, from which the particle size spectrum at a time resolution of 1 Hz is derived