Mask Particle Filtration Efficiency (PFE) Tester is used to test the particle filtration efficiency (oil or non-oil particle) of face masks, mask raw fabric (meltblown non-woven), results in percentage level, such N95 means 95% filtration level, this tester complies with GB 2626, GB 19083, GB/T 32610-2016, YY 0469.