Horizontal Laminar air flow supply purified airflow across the work area to shield the sample from airborne contaminants. These are appropriate for a wide range of applications, but they are particularly useful in settings where sterility and clean air are essential. horizontal laminar air flow enables operating in sterile and particle-free environments because a horizontal micro filtered air flow continuously flushes the working area. The work area is protected from ambient air infiltration because of the favourable pressure inside the cabinet.