一級生物安全柜
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 Therefore, limits the scope and application of grade I ark, and in the very great degree is considered to be out of date.
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一級生物安全柜
一級生物安全柜保護(hù)操作人員和環(huán)境免受生物危害的暴露。它不能防止在機(jī)柜中處理的樣品接觸到可能存在于室內(nèi)空氣中的污染物。
二級生物安全柜
二級生物安全柜同一級生物安全柜一樣，氣體也是從外部流入二級生物安全柜，通常稱為進(jìn)流。進(jìn)流能夠防止微生物操作時(shí)產(chǎn)生的氣溶膠從安全柜前面操作窗口逃逸到實(shí)驗(yàn)室內(nèi)。
三級生物安全柜
III級機(jī)柜是漏氣密封、完全封閉但通風(fēng)的機(jī)柜，所有進(jìn)入或離開設(shè)備的空氣都要通過高效空氣過濾器。
