HEPA filter

The producer of the DOP aerosol, the measuring instrument for the size and uniformity of the generating particle, the fixing instrument of the filter, the dispersion photometer and the measuring instrument for the resistance of the filter at certain quantity of the wind. This test makes the 0.3? of the particle in the single dispersion DOP aerosol pass into the HEPA filter with a range of quantity of the wind at 0~2,500cfm. And it measures the permeating efficiency with comparing the density of the parcel between upper and lower.