5: Performance Features; Laminar Airflow - Labconco Cell Logic A2 User Manual

5: Performance Features

The Cell Logic Type A2 biosafety cabinet protects items placed on the work surface, the
personnel working with material inside the cabinet, and the lab environment, when
operated to manufacturer's specifications and proper aseptic techniques are employed.
This protection is provided through the use of laminar airflow, HEPA filtration, careful
TM
cabinet construction, and Constant Airflow Profile (CAP) ECM motors. Each of the
key performance features are detailed in this section.

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 laminar downflow of air in the cabinet captures any
aerosol generated in the work area of the cabinet, and directs it to the HEPA filters. In
order to be true laminar downflow, a number of individual downflow velocity test points,
commonly referred to as the Downflow Velocity Profile, must be +/- 16 feet per minute
(0.08 m/s) of the average of all the test points.
Figure 5-1
Laminar
downflow of air
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