The borders between each Zone exhibit turbulence due to flowing of air at different speeds. Each zone, or column, of airflow is defined and has its own range in airspeed. Zoned airflow is used when equipment cannot achieve all of the protection required of a Class II biosafety cabinet with standard laminar airflow. ![]() Zoned airflow is a classification used to describe air currents within Class II BSCs that are not truly laminar or uniform. Video demonstration, laminar airflow in action: ![]() (Note that some categories of laboratory equipment, like Class I enclosures with perforated baffles or certain high performance fume hoods, employ laminar-like flow Watch: Airflow in a Class I Enclosure.) A UV light is included that can help denature genetic material (DNA, RNA, etc.), providing secondary decontamination.
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