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Class III Cabinets:
Class III Cabinets are defined as a totally enclosed ventilated unit of gas-light construction. Operations in the cabinet are conducted through hand-holes with rubber gloves. The cabinet unit is maintained under negative air pressure of at least 0.5 inch water gauge (12.7mm WG).
Supply air is drawn into the cabinet through HEPA
filters. The exhaust air treated by double incinerations. The Class III Cabinets are suitable for work with agents that require biological safety level 1, 2, 3 or 4 containment.
Class III biological safety cabinet systems aid in the control of airborne particulate contaminants generated during various procedures, including weighing and diluting chemical carcinogens, working with high risk agents or high concentrations of low or moderate risk agents, or when there equipment which generates high volume aerosol is used.
This type cabinet system provides the means to control airborne particulate contaminants, including micro-organisms determined to be potentially harmful to personnel, the product and the environment.
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