The APS 3321 Aerodynamic Particle Diameter Analyzer provides real-time high-resolution measurements in the 0.5 - 20 µm size range. The spectrometer also allows you to measure the intensity of light scattering equivalent to the optical particle size in the range of 0.5 - 20 μm.
The spectrometer uses a patented optical system that provides one two-peak signal from each particle entering the system, which determines high measurement accuracy.
A particle moving in space passes successively two beams of light from a laser source, due to which two signals are formed due to light scattering on the particle, spaced apart from each other in time equal to the time of flight of the camera.