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Laminar Flow Hoods protect samples against particulate contamination by providing a vertical or horizontal flow of micro-filtered air across the work area.

Laboratory Fume Hoods protect operators and the outside environment against fumes and particles, including germs and aerosols, generated by work in process.

Biological Safety Cabinets protect both samples and the external environment (including operators) by providing a laminar flow of micro-filtered air that is contained and either exhausted, recirculated through filters, or both.