David W. Crosby, IEST Fellow

IEST members were deeply saddened to learn of the passing of David W. Crosby on April 23, 2015. David’s jovial spirit and willingness to share his vast knowledge made him an immensely popular member of IEST and a friend to countless colleagues. David was awarded the title of IEST Fellow in 2012 with the citation: “David was instrumental in the development of HEPA filter testing procedures and refinement of techniques and standards involving filter test challenge and leak testing integrity. He shared his substantial knowledge of all phases of filter testing and leak testing with IEST working groups, thus providing the WGs with a solid technological base for producing top-quality Recommended Practices.” David’s many honors included the IEST Willis J. Whitfield award (for substantial contributions to the field of contamination control) and Robert L. Mielke award (presented to a member of the IEST Working Group program who has made significant and substantial contributions to the development of Recommended Practices in the Contamination Control Division). He also received the prestigious Mel First award from the Controlled Environment Testing Association (CETA). David was active in the air filtration and respirator industry for more than 50 years. He began his career with Air Techniques International (ATI) in 1962 and retired in 2010, but remained on with ATI as a consultant. David was involved in the design of the first portable aerosol photometer and held several patents on photometers. He was a contributing author for various trade publications, wrote and presented many technical papers, and lectured on HEPA filtration theory, aerosol generators, and aerosol photometers. Donations may be sent to the Zion Church of Baltimore (www.zionbaltimore.org).


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