Measuring number, mass, and size of exhaust particles with diffusion chargers: The dual Pegasor Particle Sensor

The application of the dual PPS with polydisperse soot as well as diesel exhaust demonstrates a good agreement with reference instruments for particle size, number and mass. The dual PPS offers significant improvement over the single PPS which is based on a fixed calibration. The prototype concept presented here can likely be optimized by using a single unit with two integrated measuring cells instead of two separate units, along with continuously measuring the inlet flowrate.