The PAMS from Kanomax USA, is a particle size analyzer and counter that is designed for portable and mobile aerosol sampling applications. The PAMS provides number-weighted diameter distribution of aerosols over the entire submicrometer range (10 nm to 863 nm) in a single scan. It employs nonradioactive bipolar aerosol charger, which enables convenient access to sampling sites with extreme caution. It can also be used for workplace protection factor measurement of respirators.