1. A miniature electrical-mobility aerosol spectrometer comprising: a single inlet section that receives particles to be evaluated and is coupled to a multi-channel electrostatic precipitator section; said electrostatic precipitator section coupled to a classifier section; said classifier section coupled to an output; said an outlet is a single flow outlet; further comprising: a plurality of upstream plates within said electrostatic precipitator section and a plurality of electrostatic precipitator plates within said precipitator section; and further comprising: a high voltage classifier plate; and one or more collection plates within said classifier section.