三級生物安全柜
Class III cabinets are leak-tight, totally enclosed but ventilated cabinets, where all air that either enters or leaves through the facility pass through a HEPA filter.
The cabinets are provided with rubber gloves that are attached to the system to be used during operations in the cabinet. This is why these cabinets are also termed ‘glove boxes’.
The cabinet even has a transfer chamber that facilitates the sterilization of materials before they leave the glove box.
Even though the gloves restrict the hand movement of the operator inside the cabinet, it prevents direct contact between the operator and the samples.
The exhaust air is treated with double HEPA filters or HEPA filters in combination with incineration.
These cabinets can be used for all four Biosafety levels (1, 2, 3, and 4). But these are the most important for the manipulation of biological materials in the Biosafety level 4.
These cabinets are mostly custom-built for specific laboratories with lab equipment built inside the chamber.
All of these structural and design features provide maximum protection to the operator, the environment, and the sample against the high-risk group 4 pathogenic organisms.
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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產(chǎn)生的氣溶膠從安全柜前面操作窗口逃逸到實驗室內(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。
