Mask Particulate Filtration Efficiency Tester Test principle:

The aerosol generator converts the 2% sodium chloride solution into particles with a concentration of 30mg/m³ and a diameter of 0.075μm. According to different standards, the particles are transported into the closed cavity by adjusting different air flows. The test starts when the concentration of the upper cavity and the lower cavity of the cavity reach equilibrium, because particles will continuously enter the cavity, so when the filter material is filtered, the concentration of the lower cavity will decrease, and the concentration of the upper cavity will remain at equilibrium status. Therefore, the computer will calculate the filtration efficiency according to the concentration difference between the upper and lower chambers.

Filtration efficiency index role Filtration efficiency is to determine whether the filter material of a mask has the function of filtering particles and bacteria; the higher the filtration efficiency, the better the protective effect of the mask.

GESTER Mask Tester recommendation:

Automatic Particulate Filter Efficiency PFE Tester GT-RA09