Biological Safety Cabinets
There are three classes of biological safety cabinets (BSCs), class I, II, and III (see schematic below).
All BSCs provide personnel and environmental protection, with Class II and Class III BSCs also providing product protection.
Personnel protection is achieved by inward airflow through the front of the cabinet; product protection is achieved by .
Certification of Bscs
Commercial BSCs are tested by the cabinet manufacturer in accordance with National Sanitation Foundation (NSF) criteria.
Cabinets that meet the NSF criteria for performance characteristics including biological containment, ventilation, cabinet leakage, and HEPA filter leakage are NSF certified.
Field certification of BSCs is also required to ensure.
Horizontal Laminar Flow Clean Bench
With horizontal laminar flow clean benches, HEPA filtered air flows horizontally across the workspace directly toward the user (see diagram at end of this chapter).
These clean benches provide product protection and were originally designed to provide a particulate free environment for manufacture of semiconductor components.
Clean benches do provi.
What are the different types of biological safety cabinets?
There are three classes of biological safety cabinets (BSCs), class I, II, and III (see schematic below).
All BSCs provide personnel and environmental protection, with Class II and Class III BSCs also providing product protection.
