Particle size distribution measurement is normally used in order to measure nanosized particle distribution. While Differential Mobility Analyzer (DMA) classifies particle by particle size utilizing electrostatic force, APM classifies particles by mass based on entirely new classification principles.
Desktop and lightweight unit
APM 3602 classifies aerosol particles of 0.01 to 100 femtograms
Particle density distribution can be attained by combining the APM and DMA