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Mask BFE Tester detects whether N95 mask meets the standard
2021/01/27
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What is N95 mask? What is N95 mask? Is N95 mask useful for COVID-19 pneumonia? The answer is, useful, N95 mask is the simplest and most useful way for ordinary people to protect themselves.Is N95 mask useful for COVID-19 pneumonia? The answer is, useful, N95 mask is the simplest and most useful way for ordinary people to protect themselves.
How do you know the filterability of masks to bacteria? Mask bacterial filtration efficiency tester can detect it, which is one of the necessary detection equipment for many mask manufacturers.
Bacterial filtration efficiency is detected by bacterial aerosol particles with an average particle diameter of about 3.0μm, and non-oily particle filtration efficiency is detected by particles with a median particle diameter of about 0.075 μ m.
● Medical protective masks and N95/KN95 have no requirements on bacterial filtration efficiency, but the filtration efficiency of non-oily particles is ≥95%, and the protective effect is better than medical surgical masks and disposable medical masks with bacterial filtration efficiency ≥95%.
● In addition to bacterial filtration efficiency ≥95%, medical surgical masks also require non-oily particle filtration efficiency ≥30, so they can also play a better protective effect;
● Disposable medical masks (or other common medical masks) only meet the requirements of bacterial filtration efficiency ≥95% (or ≥99%), and have no requirements on particle filtration efficiency, so the protective effect is relatively poor.
Bacterial & Viral Filtration Efficiency Tester Test step process:
1. Start the instrument and clean the air.
2. Install Staphylococcus aureus solution, start peristaltic pump, and supply the bacterial solution to the nozzle of sprayer.
3. Install the mask sample on route A, take route B as positive quality control, and install the plate into Anderson sampler.
4. Set the instrument parameters.
5. Take out the sampled plate, mark the layer number and place it in an incubator for cultivation, and count the positive hole count value of each layer of plate.
6. Results calculation, BFE= (average positive quality control-sum of experimental sample counts)/average positive quality control *100%
How do you know the filterability of masks to bacteria? Mask bacterial filtration efficiency tester can detect it, which is one of the necessary detection equipment for many mask manufacturers.
Bacterial filtration efficiency is detected by bacterial aerosol particles with an average particle diameter of about 3.0μm, and non-oily particle filtration efficiency is detected by particles with a median particle diameter of about 0.075 μ m.
● Medical protective masks and N95/KN95 have no requirements on bacterial filtration efficiency, but the filtration efficiency of non-oily particles is ≥95%, and the protective effect is better than medical surgical masks and disposable medical masks with bacterial filtration efficiency ≥95%.
● In addition to bacterial filtration efficiency ≥95%, medical surgical masks also require non-oily particle filtration efficiency ≥30, so they can also play a better protective effect;
● Disposable medical masks (or other common medical masks) only meet the requirements of bacterial filtration efficiency ≥95% (or ≥99%), and have no requirements on particle filtration efficiency, so the protective effect is relatively poor.
Bacterial & Viral Filtration Efficiency Tester Test step process:
1. Start the instrument and clean the air.
2. Install Staphylococcus aureus solution, start peristaltic pump, and supply the bacterial solution to the nozzle of sprayer.
3. Install the mask sample on route A, take route B as positive quality control, and install the plate into Anderson sampler.
4. Set the instrument parameters.
5. Take out the sampled plate, mark the layer number and place it in an incubator for cultivation, and count the positive hole count value of each layer of plate.
6. Results calculation, BFE= (average positive quality control-sum of experimental sample counts)/average positive quality control *100%
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