NASA NTRS · 19940000205
Improved Bubble-Point Test
Abstract
Improved bubble-point test devised for large pleated filter elements. Sizes of pores in filters determined more accurately. Test method replaces older test accurate for pore sizes of 20 microns or less, but subject to gross inaccuracy for filter elements with pores of 70 microns or larger. Unlike older test, no measurement of pressure is necessary. Also no need to estimate average depth of filter-element pleats below surface of liquid.
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Welch, Peter J., Rhodes, Russell E., Aman, Robert, Nagy, Zoltan. 1994-04-01. Improved Bubble-Point Test. https://ntrs.nasa.gov/citations/19940000205
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