一级生物安全柜
Level of biological safety cabinet is all biological safety cabinet is the most basic, the most basic design. The airflow into the enclosure aerosols containing microorganisms during the process of operation. And then, airflow through the filtration system, filter all the particles and pollutants in the air. Finally, clean, pollution-free air is discharged from the cabinet. Filter system usually consists of the pre-filter and HEPA (high efficiency particulate air filter.
Although I ark can protect the operator and the environment from biological hazards, but it cannot prevent ark processing of samples and the possible existence of air pollutants in indoor air contact. Of course, there is the possibility of cross contamination, which may affect the consistency of the experiments. Therefore, limits the scope and application of grade I ark, and in the very great degree is considered to be out of date.
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一级生物安全柜
一级生物安全柜保护操作人员和环境免受生物危害的暴露。它不能防止在机柜中处理的样品接触到可能存在于室内空气中的污染物。
二级生物安全柜
二级生物安全柜同一级生物安全柜一样，气体也是从外部流入二级生物安全柜，通常称为进流。进流能够防止微生物操作时产生的气溶胶从安全柜前面操作窗口逃逸到实验室内。
三级生物安全柜
III级机柜是漏气密封、完全封闭但通风的机柜，所有进入或离开设备的空气都要通过高效空气过滤器。
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