Difference between B2 biosafety cabinet and A2 biosafety cabinet

Difference between a2 type biosafety cabinet and b2 type biosafety cabinet
1、 Emission difference of air flow:
1. The exhaust air of A2 type safety cabinet returns to the room after high-efficiency filtration;
2. The exhaust air of B2 type safety cabinet is discharged to the outside after efficient filtration.
2、 The use of safety cabinets is different:
1. If the test object is likely to escape radioactive gas, toxic and irritating gas, please select B2 type safety cabinet.
2. Otherwise, A2 type safety cabinet can be selected.
3、 Difference of air change rate:
1. If B2 type safety cabinet is selected, please ensure that the laboratory has sufficient air exchange capacity, otherwise it will cause low suction wind speed of the safety cabinet, cause alarm and seriously reduce its biological safety.
2. A2 is not required.
matters needing attention:
Biosafety cabinets usually refer to secondary biosafety cabinets
Class II biosafety cabinets are divided into A2 and B2 types
A2 biosafety cabinet is used for ordinary microbiological experiments, which can protect personnel  samples  environment. The operating space can reach 100 level purification level
B2 biosafety cabinet is used to conduct experiments on samples with trace radioactivity and high infectivity. It can protect personnel  samples  environment. The operating space can reach 100 level purification level
Type applicable experiment
B2
Medical treatment: HIV (AIDS), PCR and tumor drug allocation laboratory
Pharmaceutical: positive control room

A2 B2 The laboratory outside the applicable place can be used.