Biological Safety Cabinet Class 3
WEIBER Biological Safety Cabinet Class III are among the most effective and most commonly used primary containment devices in laboratories working with infectious agents. They act as primary barriers to prevent the escape of biological aerosols into the laboratory environment. The Biological Safety Cabinet Class 3, generally only installed in maximum containment laboratories, is specifically designed for work with pathogenic agents, providing maximum protection. The enclosure is gas-tight Gloves attached to the front prevent direct contact with hazardous materials (Cabinet Class III are sometimes called glove box). These custom-built cabinets often attach into a line, and the lab equipment installed inside is usually custom-built as well.
The BioSafety Cabinet Class III is a totally enclosed ventilated cabinet of gas-tight construction. Operations within the Class III cabinet are conducted through attached rubber gloves. When in use, the Class III cabinet is maintained through negative air pressure of at least 0.5 inches water gauge. Supply air is drawn into the cabinet through HEPA filters. The cabinet exhaust air is filtered by two HEPA filters, installed in series, before discharge outside of the facility. The exhaust fan for the Class III cabinet is generally separate from the exhaust fans of the facility's ventilation system.
