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Protection for the user is provided by means of an inflow air curtain whilst the sample material in the cabinet is protected from the dirty laboratory environment by a constant stream of hepa filtered air (airflow velocities  inflow > 0.4 m/s & downflow between 0.25 and 0.5 m/sec).

The cabinet's performance is dependant on this looped cycle of an inflow & downflow air being maintained, it is vital that one sites the cabinet in a suitably surveyed location (& if at all possible in accordance with current standard recommendations) within the laboratory & that wherever possible the cabinet is left uncluttered with items that will disrupt the downflow air flow (provisions can often be made when large items have to remain in the cabinet or when, say, a microscope is to be used). 

Note; both BS en12469 2000 and ACDP (advisory committee for dangerous pathogens) recommend that natural gas should not be used (as this will have an impact on the cabinets airflow, the downflow filter integrity and could possibly prove to be a fire hazard - several cabinets have been set alight this way), as such this should not be offered as a standard fixture on the class II msc. If, after a risk assessment it is deemed necessary to have natural gas then a special gas solenoid type tap together with a low profile, foot operated ignition type burner should be used.

Seldom called 'a class II microbiological safety cabinet' and more commonly known amongst scientist, engineers, consultants & architects as hoods, flow hoods, safety cabinet, tissue culture cabinet and in the USA as a biohazard cabinet to name a few.

SCS Ltd can advise on a consultancy basis (free of charge should products be purchased through SCS Ltd) on any concerns a perspective purchaser may have.

SCS ltd safety cabinet recommendations

The class II msc provides optimum performance, lowest noise levels & several other advanced features.

The finest class II safety cabinets available today