The purpose of this project is to develop a concept sensing

measurement system that will determine nanoparticle

concentration. The technique selected was, to make use of

changes in pressure differential across filter media which is

exposed to a sample of air to determine the particle count of

the air sample. A curve that relates the concentration of

particles on a filter with the differential pressure across the

filter will be developed. The concept is to have a diffusion

mobility analyzer (DMA) charge and sort out particles in a

preset size range based on the electrical mobility of charged

particles. The particles in the required size range sorted by

the DMA will then be introduced into a filter. It is hoped

that the particles will clog the filter that will change the

differential pressure and produce a reading which can be

compared to a curve to determine the particle concentration