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 BrochureEN 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.
| Item | Detail |
|---|---|
| A Anderson sampler | 28.3l/min, 0.1l/min |
| Aerosol fluid | 8-10l/min, 0.1l/min |
| Pump | 0.006-3.0ml/min, 0.001ml/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 |
| CFU | 2200±500cfu |
| Power supply | 220 AC 50Hz |
| Dimension | 1200mm x 700mm x 2200mm |
| Net weight | 210 kg |
| No. | Product |
|---|---|
| 2043701 | Bacterial Filtration Efficiency Tester |
