Class 2 Biosafety Cabinets are designed to provide protection to operator, environment and materials inside the workspace. These Class II BSCs are utilized for containing low-to-moderate risk biohazardous materials. These cabinets have downward airﬂow and HEPA ﬁlters that re-circulate air providing required level of protection from microorganisms and aerosols. As these cabinets are extensively used in drug preparation, chemotherapy preparation, clinical research, medical and pharmaceutical sectors, life science and industrial laboratories etc. it must follow relevant application speciﬁc standards.- Types of Class 2 Biosafety Cabinet:
In order to meet varying research and clinical needs, Class II Biosafety Cabinets are designed mostly in 3 types i.e. Type A2, Type B1, and Type B2. Regardless of type, each cabinet provides the same level of protection. According to international sanitation standards, there are exactly same pass and fail criteria for all of them.- Biosafety Cabinet Class 2 Type A2:
In this type of Class II BSC, approximately 70% of the HEPA ﬁltered air is circulated through the cabinet, while 30% passes through an exhaust HEPA ﬁlter and is discharged.- Biosafety Cabinet Class 2 Type B1:
This Class II BSC, exhausts 60% - 70% of the HEPA ﬁltered air, while 30% - 40% air is re-circulated inside workspace through HEPA ﬁlter.- Biosafety Cabinet Class 2 Type B2:
It is total exhaust type BSC, no re-circulation inside workspace; blower exhausts 100% of the ﬁltered air.