Labconco Purifie Horizontal Clean Benches 36125 Series - Manual (Page 29)

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Chapter 4: Theory Of Operation And Safety Precautions
Laminar Airflow
Laminar airflow is defined as the movement of a body
of air in a single direction, with a uniform velocity. In
practice, the horizontal laminar flow of air in the bench
captures any aerosol generated in the work area of the
bench, and directs it out of the enclosure. In order to be
true laminar flow, a number of individual velocity test
points (The Velocity Profile) must be +/- 20 % of the
average of all the test points. This is shown graphically
in Figure 4-2.
Figure 4-1