The "Laboratory Biosafety Manual" clearly states: "Biosafety cabinets can effectively reduce laboratory infections and cross-contamination of cultures caused by aerosol exposure, and biosafety cabinets can also protect the working environment." Biological safety cabinets (Biological safety cabinets, BSCs) are used to protect infectious experimental materials such as primary cultures, bacterial strains, and diagnostic specimens, to protect workers, laboratory environment, and experimental products from Designed for exposure to infectious aerosols and spills that may be generated during the above operations.
The fume hood is designed to remove corrosive chemical gases and toxic fumes during chemical experiments. It is divided into external duct fume hood and clean gas fume hood. Air purifying fume hoods are mainly used to protect laboratory personnel from toxic chemical gas and smoke inhalation hazards, and can also be used to prevent powder inhalation hazards.
The ultra-clean workbench is designed to protect the test article or product, and prevent the test article or product from being contaminated by dust or bacteria outside the work area by blowing vertical or horizontal laminar air through the work area. Once the microbial sample is placed in the work area, laminar air will blow the air with the microbial medium to the front desk staff and cause danger.
Fume hoods and ultra-clean workbenches are not biological safety cabinets and should not be used in experiments or production processes involving microbial materials.
The fume hood ultra-clean workbench biological safety cabinet has the function of protecting the person, not protecting the sample, protecting the sample, not protecting the person and the working principle of the sample. The negative pressure form is different, the wind is drawn from the bottom up
Combination of positive pressure and negative pressure 
The selection of the biological safety cabinet is basically determined by the type of test article used in the biological test:
1. If microbiological samples and trace chemical reagents (non-corrosive) are involved in the biological test, it is necessary to use a safety cabinet equipped with an external discharge pipe. Because the HEPA filter cannot effectively filter and remove chemical gases, if it cannot be discharged, it will pose a threat to the laboratory staff and the environment;
2. Only microbiological samples are involved in the biological test, the basic type of biological safety cabinet can be used;
3. If biological tests involve cytotoxic drugs, such as various types of cancer treatment drugs, a cytotoxic safety cabinet must be used.
Shanghai Guning Instrument Co., Ltd. provides ductless fume hoods, ultra-clean workbenches and biological safety cabinets.
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