The medical face mask particle protection effect meter, medical face mask particle protection effect test machine and medical face mask particle protection effect tester for prodcut is  used to test face masks. The Particle Filtration Efficiency (PFE) test evaluates the nonviable particle retention or filtration efficiency of filter media and other filtration devices at sub-micron levels. This test is performed on face masksand all filter material that allows 1 cubic foot per minute (CFM) flow to pass through it.