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E-mail
changliu006@126.com
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Phone
18915420690
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Address
Room 402, Building 117, Shuangyin International, No. 1388 Dongfang Avenue, Wuzhong District, Suzhou
Suzhou Yikang Environmental Testing Co., Ltd
changliu006@126.com
18915420690
Room 402, Building 117, Shuangyin International, No. 1388 Dongfang Avenue, Wuzhong District, Suzhou
1. Purification workbench
Core function: Provide a locally clean environment, remove particulate matter (such as dust, microorganisms, etc.) from the workbench through filtered air (usually HEPA filters), and protect experimental samples from contamination.
Design purpose: Focus on "sample protection", without considering protection for operators or the environment.
1. Biosafety cabinet
Core function: While providing a clean environment, it achieves triple protection through specific airflow design and filtration system - protecting operators, protecting experimental samples, and protecting laboratory environment.
Design purpose: Mainly used for handling materials with biological hazards (such as pathogenic microorganisms, viruses, etc.) to prevent the leakage of harmful substances.
| Device Type | Characteristics of airflow direction | Protection scope |
| Clean Bench | Usually it is a vertical or horizontal laminar flow, where clean air is blown out from the top or back and flows directly towards the operator or environment. | Only protecting the sample, the airflow may blow microorganisms or harmful substances in the sample towards the operator, without protective effect. |
| biosafety cabinet | Adopting negative pressure design, the airflow flows into the cabinet from the outside, and the polluted air inside is filtered by HEPA filters and discharged (or circulated) to avoid leakage. | Operators (not in direct contact with airflow), samples (clean environment), and environment (filtered exhaust) are all protected. |
1. Purification workbench
Suitable for experimental operations without biological hazards, such as:
▪ Cell culture (non pathogenic cells), microbial inoculation (non pathogenic bacteria);
▪ Scenes that require a clean environment, such as electronic component assembly and precision instrument operation.
1. Biosafety cabinet
◦ Must be used for operations with biological hazard risks, such as:
▪ Handling pathogenic microorganisms (bacteria, viruses, etc.) and samples containing biotoxins;
▪ Testing of clinical samples (blood, body fluids, etc.);
▪ Experiments involving recombinant microorganisms in genetic engineering operations.
The purification workbench does not have a biological safety level classification, as it does not have protective functions and cannot be used for hazardous operations in biological safety laboratories.
Biosafety cabinets are classified into Level 1, Level 2 (A1/A2/B1/B2), and Level 3 based on their protective capabilities, with different levels corresponding to different risk levels of operations (such as Level 2 for most pathogenic microorganisms and Level 3 for highly pathogenic pathogens such as Ebola virus).
| comparative dimension | Clean Bench | biosafety cabinet |
| Protective object | Sample only | Operators, samples, environment |
| Airflow design | Laminar flow may cause outward diffusion of pollution | Negative pressure to prevent pollution leakage |
| Applicable samples | No biological hazards | Biological hazards (pathogens, toxins, etc.) |
| core function | Provide a clean environment | Safe+Clean, Control Biological Hazards |
The two cannot be mixed: using a purification workbench to handle biohazard materials may cause infection to operators; Processing ordinary samples with a biosafety cabinet will increase costs and operational complexity.
The biosafety cabinet needs to be regularly inspected (such as airflow velocity and filter integrity), while the purification workbench mainly maintains the cleanliness of the filter.
From the above differences, it can be clear that the core criterion for selecting equipment is whether the experimental material has biological hazards - if there is no hazard, a purification workbench is selected, and if there is a hazard, a biosafety cabinet must be used.