Protective Filter in Front of Flow Meter

We Don't Assume

One thing about inhaler testing -- don't assume.  Sure, the equipment looks easy.  The users are smart people.  So, what could go wrong?

That is exactly the right question.  We ask it all the time; the sensible approach to training and methods is all about risk reduction.  Take a look at the picture on the left -- there is a good filter upstream of this high-quality flow meter.  Is the filter important (hint; yes!).  What does the filter do (hint, this is a hot-film flow meter).  Do smart users forget this filter sometimes (no hint needed)?

From the Ground Up

I got my start as a graduate student with one of the fathers of ambient particle behavior, Dr. Sheldon Friedlander.  I had the good fortune to work hand-in-hand with Dr. Virgil Marple in the development of the Next Generation Impactor, in a special project funded by the leaders of the pharmaceutical inhaler manufacturing companies, who called themselves the Next Generation Impactor Consortium.  I devised the manufacturing and inspection methods for the NGI during my 19 years at MSP Corporation (now a wholly owned subsidiary of TSI Incorporated, Shoreview, MN).

Daryl L. Roberts, Ph.D.

Founder & President