Module Clean Technology Co., Ltd.

Clean Room Equipmet Series

Biosafety Operation Room

A biosafety laboratory, also referred to as biological laboratory, is a site for purpose to perform biological experiments. Schools generally possess biological laboratories,blood test laboratories in hospitals are also biosafety laboratories. Biological laboratories are usually for study and research purposes, which are classified into four classes according to research subjects.

Comparison Table for Microorganism Hazard Classes by Corresponding Biosafety Level, Operation and Equipment:

Hazard	Biosafety Level	Laboratory Category	Laboratory Operation	Safety Facilities
Class 1	Basic laboratory- Class 1 biosafety level	Basic instructions and research	GMT	Not required; open laboratory bench
Class 2	Basic laboratory- Class 2 biosafety level	Primary health service; diagnosis and research	GMT plus protective clothing, biohazard symbol	Open laboratory bench, and additional BSC is required to protect from possible aeroaol generated
Class 3	Protective laboratory- Class 3 biosafety level	Specific diagnosis and research	Special protective clothing, entry policy and unidirectional airflow in addition to Class 2 biosafety protective operation	BSC and/or all other basic equipments required for laboratory works
Class 4	Highest protective laboratory- Class 4 biosafety level	Hazardous pathogen research	Airlock entrance, exit shower and special treatment for contaminated objects in addition to Class 3 biosafety protective operation	Class III BSC or class II BSC along with positive pressure clothing, double-door high pressure sterilizer (across the wall body) and filtered air

Note: BSC-Biological Safety Cabinet; GMT-Good Microbiological Techniques

Classification for BSC （CLASS）	Surface Velocity(m/s)	Airflow to Room Circulation Ratio	Exhaust	Air Extraction System
CLASS I	0.36	0	100	Closed connection to exhaust conduit
CLASS II A1	0.38-0.5	70	30	Room exhaust or connected to exhaust system
CLASS II A2	0.5	30	30	Room exhaust or connected to exhaust system
CLASS II B1	0.5	0	70	Closed connection to exhaust conduit
CLASS II B2	0.5	0	100	Closed connection to exhaust conduit
CLASS Ⅲ	NA	0	100	Closed connection to exhaust conduit