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||28.3l/min, 0.1l/min|
|Aerosol fluid||8-10l/min, 0.1l/min|
|Pressure for A Anderson sampler||-20-0kPa,0.01kPa|
|Pressure for B Anderson sampler||-20-0kPa,0.01kPa|
|Pressure for chamber||-90–120kPa|
|Flow rate for ventilating||5m3/min|
|HEPA filtration||≥99.99% for particle over 0.3μm|
|Diameter for aerosol||3.0±0.3μm|
|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|
|Power supply||220 AC 50Hz|
|Dimension||1200mm x 700mm x 2200mm|
|Net weight||210 kg|
|2043701||Bacterial Filtration Efficiency Tester|