A Comparison of Different Laser Aerosol Spectrometers for Measurement of Particle Penetration through a Medium Efficiency Air Filter

概要

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In order to evaluate filter performance more accurately, penetration of submicron DOP (Dioctyl Phthalate) particles through a medium efficiency air filter were determined simultaneously by means of two different laser aerosol spectrometers, the PMS ASAS-X and the Royco LAS-236.In the measurement with the ASAS-X, it was found that the maximum penetrating particle size through the filter was approximately 0.15μm and maximum penetration was (5.7±1.1)×10-2. On the other hand, the LAS-236 could not clarify the existence of the maximum penetrating particle size. For particles in the first channel of the LAS-236 corresponding to the 0.15μm particle, penetration was determined to be (6.3±1.0)×10-2 by the LAS-236 measurement. Penetration obtained by the two instruments showed good agreement within the experimental error in the neighborhood of the size of maximum penetration.