The Bacterial Filtration Efficiency test determines the filtration efficiency by comparing the bacterial control counts to test article effluent counts. The test is conducted using Staphylococcus aureus as the challenge organism. After the filtration media is preconditioned.

Bacterial Filtration Efficiency, is a measure of the resistance of a material to bacteria penetration. The results are reported as percent productivity and are related to the fabric's ability to resist bacterial penetration.

Mask bacterial filtration efficiency bfe test machine is used to test the percentage of the mask material to filter out the suspended particles containing bacteria under the specified flow rate.

How is Bacterial Filtration Efficiency tested?

The Bacterial Filtration Efficiency (BFE) test is performed to determine the bacterial filtration efficiency of materials designed to protect against biological aerosols such as medical face masks, surgical gowns, caps and air filters. Efficiency is defined for different levels and the level is determined as a result of the test. 

The test is used to determine the amount of infective agent that is retained by the face mask.An aerosol pathogen of Staphylococcus Aureus is introduced into the aerosol chamber and drawn through the mash material, and the impactor under the vacuum. The results are given as a percentage. The higher the percentage, the more the mask prevents the passage of bacteria.

Application of bacterial filtration efficiency tester

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 masks by metrological inspection departments, scientific research institutes, medical mask manufacturers and other relevant departments.

Medical Masks bacterial filtration efficiency bfe 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 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.

Features of bacterial filtration efficiency test apparatus:

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.