03/11/2022
The Class III biological safety cabinet provides an absolute level of safety, which cannot be attained with Class I and Class II cabinets.
All Class III cabinets are usually made of welded metal construction and are designed to be gas tight and work is performed through glove ports in the front of the cabinet.
Class III cabinets usually exhaust air back to the laboratory; however, air may also be exhausted via a dedicated ductwork system to the external environment. When a dedicated ductwork system is employed, they are also suitable for work employing toxic chemicals as an adjunct to microbiological processes.