The laboratory workplace is changing. More attention is being given to laboratory personnel, their work environment and ergonomics, the science of fitting the workplace to the worker. This cabinet, used in laboratory investigation and protocols involving agents of low and moderate risk, includes a number of design features that improve worker productivity and comfort while being used during repetitive tasks. A Baker Company design team was charged with researching ergonomics issues associated with biological safety cabinets and making recommendations as to a new cabinet design. The team considered cabinet shape, worker position, lighting, containment and a number of other issues in composing design criteria.
Air recirculates at that location rather than exiting the hood immediately.
The matter is of some concern, because the roll is close to the breathing zone of the scientist performing the work. The current project investigated a means of reducing the concentration of contaminants directly behind the sash. If this concentration is reduced, any leakage would be less hazardous to workers in the lab. The method, called the continuous-flow bypass, introduces a constant stream of air into the hood above the sash, delivering dilution air directly to the roll. Abstract Many research animals require isolation.