the class II safety cabinet

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Originally designed by the Baker Company the class II msc is by far the most used class of microbiological safety cabinet in the world today.

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

As the performance is dependant on a continuing closed loop-cycle of inflow and downflow air being maintained it is very important that one sites the cabinet in a suitably surveyed location within the laboratory and that wherever possible the cabinet is left uncluttered with items that disrupt the downflow air patterns (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 and architects as hoods, flow hoods, safety cabinet, tissue culture cabinet and in the USA as a biohazard cabinet to name a few.

Our class II msc affords optimum performance, lowest noise levels, best ergonomics and build quality together with numerous other advanced features.