Categories of Bio-Safety Cabinet

The Bio-Safety Cabinet is a completely closed cabinet that isolates the operators or objects to avoid damage by harmful substances, it is often used in high-polluting, high-toxicity, high-hazard jobs. ACDT's Class II A2 BSC is certified with EN 12469, welcome to contact us for more information.

The categories of Bio-Safety Cabinet

◎ Class I

The Class I BSC is designed to provide personnel protection.

BSC Categories	Inlet Air Velocity	% of Air Flow		Exhaust system	Applications
	m/s	Internal re-circulated	Exhausted
Class I	0.38	0	100	External (hard duct)	It is used for laboratories that work with nonvolatile, radionuclide/chemical protection, and microorganisms at Risk.

◎ Class II: A1, A2, B1, B2

The Class II BSC is designed not only to provide personnel protection but also to protect work surface materials from being contaminated by the room air which is drawn into the cabinet. And it is used for protecting the laboratory environment as well. It is acceptable for working with medium-level risk tests. According to the National Sanitation Foundation Standard, NSF/ANSI 49(2002), it can be defined and classified into 4 types. Their features are compared below.

BSC Categories	Inlet Air Velocity	% of Air Flow		Exhaust System	Applications
	m/s	Internal re-circulated	Exhausted
Class II A1	0.38	70	30	Internal or external (Exhaust hood)	It is used for laboratories which are work with nonvolatile, radionuclide/chemical protection,microorganisms in Risk.
Class II A2	0.5	70	30
Class II B1	0.5	30	70	External (Hard duct)	It is used for laboratories which are work with lightly volatile, radionuclide/chemical protection,microorganisms in Risk.
Class II B2	0.5	0	100

◎ Class III

The Class III BSC is suitable for work in Bio-safety Level 3 and 4 laboratories and protects the highest hazardous level of Risk Group 3, Risk Group 4, or above. It virtually is a sealed gas-tight cabinet. Moreover, its supply air is HEPA-filtered, and exhaust air passes through two HEPA filters, which keep the cabinet interior under negative pressure consequently. The only way of accessing the work surface for operation is using heavy-duty rubber gloves, which are attached to ports in the cabinet virtually.

BSC Categories	Inlet Air Velocity	% of Air Flow		Exhaust System	Applications
	m/s	Internal re-circulated	Exhausted
Class III	N/A	0	100	Exhaust air should pass through two filters.	It is used for laboratories that work with lightly volatile, toxic, radionuclide-protection microorganisms at Risk.

2024-08-08