BFE is an indicator tested by Labs in Salt Lake City, Utah, USA. It refers to the filtration efficiency of bacteria in maks testing. The test used Staphylococcus aureus with an average particle size of 3 μm as the object. Most BFE masks use polypropylene (PP) as the main protective material. Mainly improve the durability of the mask. Please note that it is "durability", not "protection". Since the standard only uses 3µm test samples, we cannot know in detail the ability of BFE masks to protect against viruses below 3µm. As I said above, the diameter of the droplet is 1~5μm. This is not to say that BFE masks are not anti-virus, but the standards used in the tests are relatively loose. We cannot quantify the protective effect of this mask on coronavirus, but the BFE test does protect the bacteria. It is standard, so if you only prevent the spread of coronavirus, there is no problem. If you are not sure, please use other standard masks.     N95 is not a specific product name. As long as it meets the N95 standard, and products that pass the NIOSH review can be called N95 masks. This standard is one of 9 types of particle protective masks certified by the National Institute of Occupational Safety and Health (NIOSH). "N" indicates oil-resistant particulate matter, and "95" indicates the filtration efficiency of particles with an aerodynamic diameter ≥ 0.3 μm. Above 95%, it can effectively filter out non-oily particles, such as dust, acid mist, paint mist, microorganisms, etc. As can be seen from the above, the N95 mask can prevent coronavirus.     Generally speaking, the higher the protective performance of the mask, the greater the impact on the comfort performance. When people wear masks to inhale, the masks have a certain resistance to the flow of air. When the inhalation resistance is too large, some people will feel dizzy, chest tightness and other uncomfortable conditions. Therefore, the basic principle of wearing a mask is to wear it scientifically and reasonably, to use it in a standardized manner, and to effectively protect it.

Application Medical mask testing Textile material testing Laboratory related tests Standard EN 14683 Functional advantages Built-in touch screen and micro printer High-precision differential pressure sensor, digitally displays the differential pressure across the sample Manual control of air flow and time Pressure sensor, gas quality controller can be calibrated and measured Theoretical method The output of the air flow is set by a gas flow meter, the air flow passes through a certain area of the test sample, the current pressure is detected by a pressure sensor, and the pressure difference is calculated. Technical index Item Technical Parameter Pressure Sensor Range 0～500Pa Pressure Sensor Accuracy ±0.5% F.S Air Flow Rrange 1 ~ 10L/min（Standard 8L/min） Air Flow Accuracy ±1.0% F.S Gas Source Compressed Air Air Pressure ≥0.3MPa Dimensions 350mm×260mm×360mm Weight 20kg Power Supply AC220V, 50HZ For more discount information on mask testing instruments, you can call 13539758284 or contact email: info@gbtest.cn

GBPI offers a comprehensive set of testing machine for surgical face masks and general-use medical masks. These tests are essential to ensuring performance properties are validated to support marketing label claims and to classify these mask types. For CE marking submissions, additional tests may be required depending on label claims. Summary of face mask testers Bacterial Filtration Efficiency (BFE) Differential Pressure Particle filtration efficiency Synthetic blood fluid penetration resistance for face masks Ethylene Oxide (EO) Residual Testing Face Mask Respiratory resistance testing mask elastic band testing Flammability test click to see GBPI face mask testers Applicable Standards ASTM 2100 EN 14683 NIOSH ISO 10993 Study Outline Bacterial Filtration Efficiency (BFE) 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, a liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 28.3 liters per minute (LPM) or 1 cubic foot per minute (CFM). The aerosol droplets are drawn through a six-stage Andersen sampler for collection. The number of bacterial aerosol droplets contacting the filter media is determined by conducting challenge controls without filter medium in the test system. Challenge controls are maintained at 1700 – 3000 colony-forming units (CFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9%. Click to see the Principle of BFE tester Particle Filtration Efficiency (PFE) The Particle Filtration Efficiency (PFE) test evaluates the nonviable particle retention or filtration efficiency of filter media and other filtration devices at sub-micron levels. This test is performed on face masks and all filter material that allows 1 cubic foot per minute (CFM) flow to pass through it. Also referred to as Latex Particle Challenge, this test is required for ASTM F2100 and is performed according to the ASTM F2100 and follows the basic principle of ASTM F2299. Applicable Standards ASTM F2100 ASTM F2299 more details of Particle filtration efficiency tester Synthetic Blood Penetration for Liquid Barriers The Synthetic Blood Penetration – Splash Resistance test is one of two synthetic blood resistance tests to determine a product’s ability to act as a barrier to blood-borne pathogens. The Splash Resistance test method challenges medical face masks with a fixed volume of synthetic blood directed at high velocity at the center of the mask. This test is required by ASTM F2100 and is tested in compliance with ASTM F1862, ASTM F2100, EN 14683, and ISO 26609. Applicable Standards ASTM F1862 ISO 22609 ASTM F2100 EN 14683 more details of mask Resistance against Penetration tester Flammability Test: The Flammability test proc...

The Bacterial Filtration Efficiency (BFE) test is performed on filtration materials and devices that are designed to provide protection against biological aerosols, such as face masks, surgical gowns, caps, and air filters. This test is used for FDA 510(k) submissions for surgical masks, is required by ASTM F2100 and EN 14683, and complies with ASTM F2101 and EN14683. Click to view BFE tester Applicable Standards · ASTM F2100 · EN 14683 · ASTM F2101 Study Outline Bacterial Filtration Efficiency (BFE) 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, a liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 28.3 liters per minute (LPM) or 1 cubic foot per minute (CFM). The aerosol droplets are drawn through a six-stage Andersen sampler for collection. The number of bacterial aerosol droplets contacting the filter media is determined by conducting challenge controls without filter medium in the test system. Challenge controls are maintained at 1700 – 3000 colony-forming units (CFU) with a mean particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to >99.9%. The BFE test offers a number of advantages over other filtration efficiency tests. It has been used with little or no modification for years and provides a standard reference for comparison of filtration materials. The mean particle size can be tightly controlled and is sized using a six-stage viable-particle Andersen sampler, permitting stage-by-stage analysis. The BFE procedure is reproducible, and provides a more severe challenge to most filtration devices than would be expected in normal use. Large numbers of material can be evaluated in a relatively short time. BFE testing is commonly performed along with the Differential Pressure (Delta P) test. For housed filters, we recommend the Increased Challenge method. This procedure uses a higher concentration of challenge to be delivered to each test material. Filtration efficiency measurements can be determined up to >99.9999%. Increased Challenge Bacterial Filtration Efficiency (BFE) The Increased 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. A liquid suspension of S. aureus is aerosolized and delivered to the filtration media at a constant flow rate of 30 liters per minute (LPM). The aerosol droplets are collected in all-glass impingers (AGIs) in parallel. The challenge is delivered for a one-minute interval and sampling through the AGIs is conducted for two minutes to clear the aerosol chamber. The titer of the assay fluid is det...

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