Aerosol Sampling with a Side Port Probe

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Abstract
A most important consideration in determining particulate concentration in a gas stream is that of obtaining a true sample. This report describes an experimental investigation of a side port probe and a conventional sampling probe for obtaining aerosol samples from a duct. Sampling bias for both types of probe was determined experimentally over a wide range of test conditions using monodispersed aerosols from 0.5 to 10 microns in diameter. Sampling bias was shown to be a function of the inertial impaction parameter and duct to probe velocity ratio. Experimental results are presented. Operational limits over which a sampling probe can be used are shown as a function of the permissible sampling error.

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