Lots of domestic and foreign scientific researches prove that cleanliness in clean room is largely determined by efficiency of the high-efficiency filter and flow pattern.

Indication of inlet-outlet pressure difference between master cyclone inlet and outlet; local indication of pressure difference between high-efficiency filter inlet and outlet.

Objective To evaluate the protective efficacy of protective equipment, such as gas-filtering can, high-efficiency filtering material and high-efficiency filter, against microorganism aerosol.