Class 2 Biosafety Cabinet: Everything You Need to Know Before Purchasing It

Working on potentially infectious samples without the right containment system is never going to be an explanation that any laboratory manager wants to give afterwards. And this is precisely why Biosafety cabinet class 2 is found right at the heart of most laboratories involved in microbiology, virology, and cell culture – it provides protection for the worker behind the desk, for the sample, and the lab itself as well.

Class 2 Biosafety Cabinet’s Defenses

A Class 2 biosafety cabinet is also known as Class II BSC and has been made to be a triple protected piece of equipment – it ensures personnel, product, and environmental protection. It does so by ensuring that there is inward air flow, thus, preventing the aerosols from moving toward the operator, HEPA-filtered air flow from above to ensure the workbench is not contaminated, and HEPA-filtered exhaust air to prevent the contaminated air from being dispersed either in the laboratory or in the environment. It should also be noted that Class 2 BSC is different from a laminar flow hood, because laminar flow hood only provides protection for the product.

Reasons Why this Equipment is Unavoidable in Some Labs

All the labs that deal with biological agents of Risk Groups 2 and 3, cells, or other infectious materials require a functional Class 2 hood because it is not only mandatory but also a necessity in accordance with biosafety levels. All the labs for microorganisms' cultivation, labs dealing with live viruses, and also diagnostics labs of hospitals use this equipment because aerosol-producing procedures should be prevented from becoming a source of contamination. Pharmaceutical and biotechnological companies also use Class 2 hoods in vaccine development and cell-based therapies.

Types A2, B1, and B2: What Sets Them Apart

Buyers tend to be confused about different types of cabinets, but it is quite essential to know for both safety and ducting requirements. Cabinets of type A2 recycle a part of the filtered air back into the laboratory and represent the most frequently used option for microbiology research. Cabinets of types B1 and B2 have more efficient external air exhaust using hard ducting and represent the better option when volatile chemicals or trace radionuclides are used in addition to biological materials. The wrong type chosen will cause either additional ducting expenses or even insufficient protection of the processes performed.

What Features Should You Look for?

It is important that the quality Class 2 biosafety cabinet provides HEPA filtration efficiency, constant inflow velocity, and UV sterilization for the work surface decontamination. Digital monitoring of the airflow with alarms when filters are full or there are deviations from the standard is an additional safety feature because the cabinet functioning outside its validated limits gives a false sense of security.

Selecting the Appropriate Manufacturer

Before signing off on your decision to buy, verify that the manufacturer supplies performance validation documentation, such as airflow velocity testing and HEPA filter integrity certification, as this information is usually requested when undergoing lab accreditations. It would also be prudent to look into their support for installation and yearly certification, as a biosafety cabinet’s effectiveness lies in how recently it was validated.

Conclusion

It must be understood that a Class 2 biosafety cabinet is not just an appliance with a fan built in, but rather it is the main line of defense against a real biological threat. Purchasing and maintaining an effective cabinet is an investment well worth making.