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Contact SupplierApart from performing the functions of the regular laminar airflow equipment, it also protects the operator from the toxic / pathogenic contamination created during the research activities and also protects the atmosphere from such contaminations. For example, if an operator performs research on HIV virus or any other very hazardous / toxic materials, the operator needs to protect from the possible contamination /infection due to the virus he handles in his laboratory. A bio-safe hood does the job of protecting the not only the operators but also the environment by removing those viruses from the air-stream by means of High Efficiency Particulate Air Filters.
The biological safety cabinets (BSCs), enclosed containers and other engineering controls designed to remove or minimize exposures to hazardous biological materials. The biological safety cabinet (BSC) is the principal device used to provide containment of infectious splashes or aerosols generated by many microbiological procedures. Three types of biological safety cabinets (Class I, Class II (A1, A2, B1, & B2 ), Class III used in microbiological laboratories application. Open-fronted Class I and Class II
biological safety cabinets are primary barriers which offers significant levels of protection to laboratory personnel and to the environment when used with good microbiological techniques. The Class II biological safety cabinet also provides
Biological Risk Assessed | Protection Provided | BSC CLASS | ||
Personnel | Product | Environment | ||
BSL 1-3 | YES | NO | YES | CLASS I |
BSL 1-3 | YES | YES | YES | II TYPE A1, A2, & B2 |
BSL 1-4 | YES | YES | YES | III B1, B2 |
Type | Face Velocity(1fpm) | Airflow Pattern | Radio-nuclides / Toxic Chemicals | Bio-safety Level(s) | Product Protection |
Class I Open Front | 75 | In at front; rear and top through HEPA filter | NO | 2,3 | YES |
Class IIType A | 75 | In at front; rear and top through HEPA filter | NO | 2,3 | YES |
Type B1 | 100 | Supply air 30% re-circulated through HEPA; remaining 70% exhaust through HEPA and hard ducted to atmosphere | Yes (Low levels / Volatility) | 2,3 | YES |
Type B2 | 100 | No re-circulation; total exhaust via HEPA and hard ducted | YES | 2,3 | YES |
Type A2 | 100 | Same as type IIA, but plenum under negative pressure to room and exhaust air is ducted to atmosphere | YES | 2,3 | YES |
Class III B 1 &B2 | NA | Supply air inlets and exhaust through 2 HEPA filter | YES | 3,4 | YES |