Provide a variety of filter test system with high precision and easy to use. It is used to test air filters for clean rooms, vehicles and civil buildings, filter elements of air purifiers, floor sweepers and medical anesthesia machines, etc. The types of filters can be tested include flat plate, W-type (V-type), bag filter, cylinder (cartridge), irregular shape, etc. Test indicators include filter efficiency, resistance, air volume-resistance curve and ePM2 5, leakage by scan method, etc.