Top air biosafety cabinet

  • How high is a biosafety cabinet?

    The applicable guidance for a BSC would be: The BSC work surface must be from 28 inches (710 mm) to 34 inches (865 mm) high..

  • What is the airflow rate of a biosafety cabinet?

    Type A1 BSCs (formerly known as Type A)
    Type A1 cabinets have an inward airflow of 75 feet per minute (fpm), and recirculate approximately 70% of discharge air through the supply HEPA filter back to the work zone..

  • What is the direction of airflow in a BSC PTU?

    BSC's have a sash in the front and the air is drawn away from you through the grill-work along the edges..

  • What is the highest level of biosafety cabinet?

    The four biosafety levels are BSL-1, BSL-2, BSL-3, and BSL-4, with BSL-4 being the highest (maximum) level of containment..

  • What type of air current is used in biosafety cabinets?

    The laminar (unidirectional) downflow air pattern helps prevent cross contamination within the cabinet, between samples..

  • Which direction is the airflow on a biological safety cabinet?

    To protect the work product, the cabinet's downward air is cleaned by a high efficiency filter within the cabinet.
    Upon reaching the work surface, roughly half of the downflow air moves toward the front grille and the other half moves towards the back grille..

  • Type A1 BSCs (formerly known as Type A)
    Type A1 cabinets have an inward airflow of 75 feet per minute (fpm), and recirculate approximately 70% of discharge air through the supply HEPA filter back to the work zone.
The TopAir Biosafety Cabinet provides a Class II A2 work area to protect users, the lab environment, and applications using biological agents. This biological safety cabinet protects users with two layers of HEPA filtration and a 70/30 circulation/exhaust airflow pattern.
TopAir's Class II Biological Safety Cabinets protect staff, the environment, and sensitive work processes in which biological agents are applied, 

What is a Class II Biological Safety Cabinet?

TopAir’s Class II Biological Safety Cabinets protect staff, the environment, and sensitive work processes in which biological agents are applied, typically in the biological and microbiological industries.

What is the difference between A2 and B1 biological safety cabinets?

In the A2 cabinet, about 70% of air from the positive plenum is recirculated as downflow, and the remaining 30% is discharged to the lab through the exhaust filter.
The Class II Type B1 biological safety cabinet has a common plenum from which 70% of air is exhausted, and 30% re-circulated to the work area as the downflow.


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