Bacterial & Viral Filtration Efficiency(BFE/VFE)Tester
Mask bacterial filtration efficiency (BFE) tester is used to quickly and accurately detect Bacterial Filtration Efficiency (BFE) of various flat masks, 3D masks, and protective materials. This product is developed strictly following the Attachment B in YY0469-2011 "Medical Surgical Mask", Bacterial Filtration Efficiency (BFE) experimental method.
The product uses highly integrated design, intelligent control technology. It also conforms to ASTMF2100, ASTMF2101 and EN14683.
Application
It is used to test the percentage of materials containing bacteria suspended particles at the specified flow rate. The dual gas path simultaneous comparison sampling method is used to improve the accuracy of sampling, which is suitable for the performance testing of bacterial filtration efficiency of medical surgical by metrological inspection departments, scientific research institutes, medical mask manufacturers and other relevant departments.
Standards
YY 0469 Technical requirements for surgical mask
BS EN 14683 Medical face masks - Requirements and test methods
ASTM F2100 Standard Specification for Performance of Materials Used in Medical Face Masks
ASTM F2101 Standard Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureus
NBR 15052
Parameters
| Item | Specification |
|---|---|
| A Anderson sampler flow | 28.3 L/min, resolution 0.1 L/min |
| Aerosol flow | 8–10 L/min, resolution 0.1 L/min |
| Pump flow | 0.006–3.0 mL/min, resolution 0.001 mL/min |
| Pressure (A/B sampler) | −20 ~ 0 kPa, resolution 0.01 kPa |
| Chamber pressure | −90 ~ −120 kPa |
| Ventilation flow | 5 m³/min |
| HEPA filtration | ≥99.99% (≥0.3 μm particles) |
| Aerosol particle size | 3.0 ± 0.3 μm |
| Anderson sampler stages | 6-stage particle size classification |
| CFU count | 2200 ± 500 CFU |
| Power supply | AC 220 V, 50 Hz |
| Dimensions | 1200 × 700 × 2200 mm |
| Net weight | 210 kg |
Feature
1. Negative pressure testing system, which can protect operator’s safety.
2. Peristaltic pump was built in the negative pressure cabinet, A & B two routes 6 level Andersen sampling head.
3. The flow speed of peristaltic pump can be set.
4. The spray flow of bacterial liquid inside the special microbial aerosol generator can be set.
5. Good atomization effect.
6. Embedded high speed industrial microcomputer control.
7. 10.4 "industrial high brightness color touch screen display.
8. USD connector, support USB data archived
9. High brightness light installed in the cabinet.
10.Switching type glass door in front of the machine, easy to observe by the operator.
FAQ
(1)What does a BFE/VFE tester measure?
It measures the filtration efficiency of materials against bacteria- or virus-containing aerosols, indicating how effectively a mask or material blocks microorganisms.
(2)Why is dual-channel sampling important?
It allows simultaneous upstream and downstream comparison, improving test accuracy and reducing variability.
(3)What particle size is used in BFE testing?
Typically, aerosols around 3.0 μm are used to simulate bacterial particles in standard testing methods.
(4)Which materials can be tested?
Medical masks, nonwoven fabrics, filtration media, and other protective materials.
(5)How is filtration efficiency calculated?
By comparing the number of bacterial colonies collected before and after passing through the sample, expressed as a percentage reduction.
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