Face Masks bacterial filtration efficiency BFE tester is to determine the bacterial filtration efficiency (BFE) of medical face mask materials by employing a ratio of the upstream bacterial challenge to downstream residual concentration of the tested medical face mask materials. The tester provides 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.
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
Feature of BFE Testing Machine:
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.
Parameter of BFE Tester:
|
Key Specification |
Specification Range |
Resolution |
Max. permissible errors |
|
A Route Sampling Flow |
28.3L/min |
0.1L/min |
Within ± 2.0% |
|
B Route Sampling Flow |
28.3L/min |
0.1L/min |
Within ±2.0% |
|
Spray Flow |
(8～10)L/min |
0.1L/min |
Within ±5.0% |
|
Peristaltic Pump Flow |
(0.006～3.0)mL/min |
0.001ml/min |
Within ±2.0% |
|
Front Pressure of A Route Sampling Flowmeter |
(-20～0)kPa |
0.01kPa |
Within ±2.0% |
|
Front Pressure of B Route Sampling Flowmeter |
(-20～0)kPa |
0.01kPa |
Within ±2.0% |
|
Front Pressure of Spray Flowmeter |
(0～300)kPa |
0.1kPa |
Within ±2.0% |
|
Negative Pressure of the Chamber |
(-90～-120)Pa |
0.1Pa |
Within ±1.0% |
|
Working Temperature |
0-50℃ |
|
Negative Pressure of the Chamber |
＞120Pa |
|
Data Save Ability |
＞500000 sets（Scalable capacity） |
|
High Efficiency Particulate Air Filter Properties |
≥99.995%@0.3μm, ≥99.995%@0.12μm |
|
Median diameter of aerosol generator mass |
Average diameter: (3.0±0.3)μm; Geometric Standard Deviation≤1.5 |
|
Double Routes 6-lever Andersen Sampling apparatus |
LevelⅠ＞7μm; Level Ⅱ: (4.7～7)μm;
Level Ⅲ: (3.3～4.7)μm; Level Ⅳ: (2.1～3.3)μm;
Level Ⅴ: (1.1～2.1)μm; Level Ⅵ: (0.6～1.1)μm |
|
Size of Aerosol Chamber |
600×80×3mm (Length×Diameter×Thickness) |
|
Total number of positive quality control sampler particles |
(2200±500)cfu |
|
Negative Chamber Flow Speed |
≥5m3/min |
|
Size of Main Machine |
1470×790×2100mm (L×W×H)
|
|
Power Supply |
AC220V±10%, 50Hz |
|
Noise of the Tester |
＜65dB(A) |
|
Weight |
≈150kg |
|
Power Consumption |
＜1500W
|
Medical mask bacterial filtration efficiency tester, also known as BFE Tester, by using the ratio of the upstream bacterial challenge to the downstream residual concentration of the measured medical mask material, to determine the medical mask material(such as meltblown fabric)bacterial filtration efficiency(BFE).The machine provides a certain flow rate of bacterial aerosols.
