A vented enclosure known as a biological safety cabinet protects people, products, and the environment from aerosols created when potentially dangerous microorganisms are handled. A HEPA filter allows the constant airflow to be released into the atmosphere.

States of Protection: three

• Personal defence against dangerous substances within the cabinet
• To prevent sample contamination, use product protection.
• Environmental protection from the cabinet's internal pollutants.
• Chemical Protection Based on how well they can hold biological agents, cabinets are divided into three categories.

Class 1 cabinets

used when handling biological agents that provide a low to medium risk.

Biosafety levels: 1, 2 and 3

Class 2 Cabinets

used when handling biological agents that provide a low to medium risk.

Biosafety levels: 1, 2 and 3

Class 3 Cabinets

a "glovebox" in a highly specialised laboratory The highest level of protection for the environment, the product, and the user is offered by a Class 3 cabinet, which offers the same protection as a Class 2 but is made for working with Biosafety Level 4 highly contagious substances.

used when working with biological substances that pose an extremely high risk.

Biosafety Level: 4