Patent ID: 8044350
Filing Date: 2011-10-25
Classification: G01N,Y10T

Abstract:
1. An apparatus for measuring particle size distribution, said apparatus comprising: a charging device comprising a corona tip and a charger body, said corona tip configured to generate charged ions in response to a first applied voltage, said charger body configured to generate an electrical field in response to a second applied voltage to channel the charged ions out of said charging device in a direction, wherein the second applied voltage is lower than the first applied voltage, said corona tip and said charger body being arranged coaxially relative to each other to direct a flow of a plurality of particles through the electrical field in a substantially parallel direction relative to the direction of the charged ions channeling out of said charging device; and a precipitator for receiving the plurality of particles from the charging device, said precipitator comprising a disk comprising a top surface and an opposite bottom surface, wherein a predetermined voltage is applied to said top surface and said bottom surface to precipitate the plurality of particles, wherein said precipitator further comprises an upper plate and a lower plate, said disk being arranged between said upper and lower plates.