INSTRUMENT FOR SIZING NANOPARTICLES AND A COMPONENT THEREFOR

摘要

An improved nanoparticle sizing apparatus comprised of a unipolar charger operatively coupled to a radial differential mobility analyzer in combination with a condensation particle counter and powered by a power source such as a battery or solar cell, thereby providing a portable sizing device.

主权项

1. A particle sizing instrument, comprising:
an electrical charging device adapted to bring ions into contact with a particle laden aerosol stream to effect a charging of the aerosol stream to produce electrically charged particles; a differential mobility analyzer operatively coupled to said electrical charging device and adapted to electrostatically remove excess ions and to selectively remove high electrical mobility particles from the aerosol stream; a condensation particle counter operatively coupled to said differential mobility analyzer and adapted to measure a number of particles in the aerosol stream flow; and a manifold assembly operatively coupled to the charging device and adapted to serve as a conduit for a sheath air flow to said electrical charging device and to provide an exhaust conduit for the particle laden aerosol stream exiting said condensation particle counter.