Clean benches - also called laminar flow cabinets - are used in applications where sample protection is required. They are enclosed laboratory bench that is designed to prevent pollution and contamination by controlling and keeping the air cleanliness level at a certain point. Horizontal laminar flow technology filters the air before it reaches the work area to provide a clean (aseptic) space for sample handling. Clean benches are used in a variety of industrial, clinical, and pharmaceutical applications. It is a type of laminar airflow cabinet (also known as a tissue culture hood).