SX-BHC series Biosafety cabinet belongs to Class II Biosafety cabinet. The negative pressure air flow inhaled from the front opening area is used to protect the safety of personnel, the vertical air flow through the HEPA is used to protect the safety of the tested samples, and the exhaust air flows through the HEPA filter to protect the environment from pollution.

SX-BHC series Biosafety cabinet are designed and produced in strict accordance with NSF-49, JG170-2005 and other standards. In addition to the usual floating layer analysis and particle counting methods, microbial methods are also used to evaluate the performance of Biosafety cabinet.

1、 Working principle
When the fan is started, the airflow that flows into the cabinet from the previous working area is called inflow airflow and contains airborne aerosol substances generated during microbial experimental operations. The inflow airflow is sucked into the inflow airflow fence net in front of the nearest working platform to the operator. There is no unfiltered inflow airflow entering the actual working area of the safety cabinet, so there is no need to worry about sample contamination. The unique feature of the Biosafety cabinet is that there is a vertical downward airflow layer (air curtain airflow) filtered by HEPA inside the cabinet. The falling airflow layer will take away the pollutants in the air inside the cabinet, thus protecting the experimental samples from pollution. This downward airflow layer is called downflow gas (downflow). When the downward airflow is close to the workbench, it will be divided into two streams: one stream enters the air barrier net at the back of the cabinet, and the other stream is sucked into the air barrier net closest to the operator. All gases inside the cabinet are treated as a whole, with some being discharged outside the cabinet through HEPA filters, while the other part is circulated as a downflow inside the cabinet after being filtered by HEPA. Since the air flow in the cabinet is always in a negative pressure state, the operators and the environment are not exposed to harmful Biogenic substance, which is applicable to the work of biological reagents in the biosafety standards of Class I, II and III.

2、 Performance characteristics
（1）Designed with a 10 ° tilt angle that conforms to ergonomic principles, providing a better operating experience;
（2）The shell is made of high-quality cold-rolled steel plate and electrostatically sprayed; The three sides of the safe cabinet operation area adopt a stainless steel (SUS304) integrated structure, and the interior is treated with 8mm large rounded corners for easy cleaning;
（3）Vertical laminar negative pressure model, with 30%/100% filtered and discharged return air;
（4）Unique internal cavity safety negative pressure design, air curtain isolation, ensuring no leakage during normal use and ensuring the safety of operators
（5）A bracket type safety cabinet, which can be separated from the upper box body for easy handling and positioning;
（6）The exhaust has a dedicated high-efficiency filter to ensure that the discharged air meets the requirements of national standards;
（7） Integrated sliding safety sliding door, can be positioned arbitrarily, easy to operate, and can be fully closed for sterilization;
（8）Equipped with filter failure alarm, forced draft fan overload alarm, and work window opening limit alarm system;

3、 Product Features
This Biosafety cabinet is designed and produced in strict accordance with the standards of NSF-49 and JG170-2005. In addition to the usual floating layer analysis and particle counting methods, the microbial method is also used to evaluate the performance of the Biosafety cabinet.

4、 Technical parameters

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