![]() 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. PCR stations, enclosures that are specifically designed to house polymerase chain reaction experiment, utilize vertical flow of HEPA-filtered air to maintain a particulate-free work environment.In both instances, laminar flow provides a particulate-free work area In a vertical clean bench, laminar air is then projected vertically over the work area. In a horizontal clean bench, laminar air is projected horizontally towards the operator. This is a type of tissue culture hood that can be used with non-hazardous biological samples. Air is drawn in through a prefilter located at the top of the clean bench before being pulled through a HEPA filter. Clean benches are sometimes referred to as laminar flow hoods or laminar airflow workstations. ![]() Laminar flow clean benches are suitable for applications that require product protection, such as media plate preparation or tissue culture maintenance. Whichever model suits your application, safe operation within biological safety cabinets is imperative to protect the integrity of your work and your personal safety.
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