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Laminar Flow Cabinets for Scientific Research

Introduction to laminar flow clean bench

A laminar flow cabinet is defined as enclosed workbench which is used to create a contamination free work environment through installed HEPA filters that capture all the particles entering the cabinet. A cabinet is used for work with substances which are not hazardous for the personnel health.

Desktop chambers, also known as clean benches, are similar to biosafety cabinets in the sense that they are equipments used to clean up the ambient air completely through a filtration process. Generally, laminar air flow is designed to prevent the contamination of semiconductor wafers, some sensitive materials, and even biological samples.

A cabinet has an industry-wide usage and can be applied in quite a lot of industries such as medical, research, pharmacy, educational, аnd also in electronics, optics, micromechanics, plastic industries, etc. since they carry out processes that require a clean and sterile environment. A cabinet is used for work with substances which are not hazardous for the personnel health, and it does not provide personal protection. The best usage of a clean bench is for working on certainly specialized experiments in the labs that require a clean environment to design products that are nontoxic. Laminar flow hood creates clean air for an individual environment, which is necessary for smaller items - for example, sensitive electronic devices. Hence, laminar flow can be tailor-made under the specific requirements of the laboratory.

How does a laminar air flow unit work?

A cabinet is a workbench commonly used in research and medical laboratories that creates dust free abacterial air environment.

Air from the room passes through the HEPA (High Efficiency Particulate Absorbing) filters and is fed into the working chamber by a unidirectional vertical descending flow. From the working area and the workbench itself the air is moved back to the environment in the following way: partly – through the perforation in the bottom rear area of the cabinet, but most air – through the space between the working surface of the table and the protecting glass.

Flow hood involves a unidirectional exhaustion of air to the workplace and personnel whereby filtered air is discharged with a regular and fixed velocity.

Some of the basic components of a chamber include UV light, glass shield, an air intake fan, a protection plate, windows, etc. Each of the components of a clean bench plays an important role in creating and maintaining sterile conditions. The laminar flow hood fan pulls the air through the filter pad where the dust is pinned down; then, the HEPA filter pulls out all airborne contamination to maintain sterile conditions.

Types

The direction in which the air moves around the workspace and a clean bench is based on the specific cabinet that is being used. The type of cell culture hood needed depends very much on the requirements of the laboratory, the kind of airflow needed, working laminar air flow principle, and the type of operation. Two main types of flow hoods differ according to the functions they can perform: horizontal airflow hood and vertical airflow hood.

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