Medical Masks bacterial filtration efficiency tester also called BFE test machine is to determine the bacterial filtration efficiency (BFE) of medical face mask materials by employing a ratio of the upstream bacterial challenge to the downstream residual concentration of the tested medical face mask materials. The tester provides a certain flow rate of bacterial aerosol. The operator can measure the number of colony-forming units passing through the medical face mask material, which is clamped between a six-stage Anderson cascade impactor and an aerosol chamber, expressed as a percentage of the number of colony-forming units present in the challenge aerosol.Click Here to Download Brochure
EN 14683 Medical face masks-Requirements and test methods.
ASTM F2101 Standard Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureus.
ASTM F2100 Standard Specification for Performance of Materials Used in Medical Face Masks.
YY 0469 Technical requirements for surgical mask.
|A Anderson sampler
|Pressure for A Anderson sampler
|Pressure for B Anderson sampler
|Pressure for chamber
|Flow rate for ventilating
|≥99.99% for particle over 0.3μm
|Diameter for aerosol
|Capture diameter for Anderson sampler
|I grade >μm, II grade（4.7-7）μm, III grade（3.3-4.7）μm, IV grade（2.1-3.3）μm, V grade（1.1-2.1）μm, VI grade（0.6-1.1）μm
|220 AC 50Hz
|1200mm x 700mm x 2200mm
|Bacterial Filtration Efficiency Tester