The DMA consists of a cylindrical chamber with a central rod and an outer cylinder. An electric field is established between the central rod and the outer cylinder. Aerosol particles are introduced into the chamber, where they are subjected to both an electric field and a flow of clean, particle-free air. Particles then migrate towards the central rod based on their electrical mobility, which is a function of their size and charge. By adjusting the electric field and the flow rate, particles of different mobilities can be classified and collected.
