Electrical_aerosol_spectrometer
Electrical aerosol spectrometry (EAS) is a technique for measurement of the number-size distribution of aerosol using a combination of electrical charging and multiple solid state electrometer detectors. The technique combines both diffusion and field charging regimes to cover the diameter range 10 nm to 10 μm.[1][2]
Subsequent developments of the technique enable measurements faster than 1 Hz, although in each case with a reduced size range.[3][4]