Medical Mask Bacterial Filtration Efficiency Tester - BFE Detector

The GBPI medical mask bacterial filtration tester determines the filtering properties of the mask against a certain air flow. It is a complete test station with a fully automatic and fine-tuned touch control panel.

ASTM F2100, EN 14683, ASTM F2101

Please contact for a list of all standards.

Medikal maske bakteriyel filtrasyon verimliliği test cihazı

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XF1000

Bacterial Filtration Efficiency Test

Bacterial Filtration Efficiency (BFE) testing is done on filtering materials and devices designed to protect against biological aerosols such as face masks, surgical gowns, caps, and air filters.

This test is used for FDA 510 (k) references for surgical masks, is required for ASTM F2100 and EN 14683 and complies with ASTM F2101 and EN14683. Nelson Labs staff helped develop this test method, so we have more experience with this test than any other company. We can provide one-stop shopping for all ASTM F2100 and EN 14683 test needs.

BFE Detector

The Bacterial Filtration Efficiency test determines the filtration efficiency by comparing the bacterial control numbers with the test substance waste numbers. The test is carried out using Staphylococcus aureus as the challenge organism. After the filtrate is pre-conditioned, the liquid suspension of S. aureus is aerosolized and sent to the filtrate medium at a constant flow rate of 28.3 liters per minute (LPM) or 1 cubic meter per minute (CFM).

The aerosol droplets are drawn from the six-stage Andersen sampler for collection. The number of bacterial aerosol droplets contacting the filter medium is determined by performing test checks without the filter medium in the test system. Difficulty controls are maintained at 1700-3000 colony forming units (CFU) with an average particle size (MPS) of 3.0 ± 0.3 µm. This ensures that filtration efficiency is reported up to> 99.9%.

The BFE test offers a number of advantages over other filtration efficiency tests. It has been used for years with little or no modifications and provides a standard reference for comparison of filtration materials. The average particle size can be tightly controlled and is sized using a six-stage viable particle Andersen sampler that allows for step-by-step analysis. The BFE procedure is repeatable and creates a more serious challenge for most filtration devices than expected in normal use. Many materials can be evaluated in a relatively short time.

The BFE test is usually done in conjunction with the Differential Pressure (Delta P) test.

We recommend the Increased Difficulty method for the built-in filters. This procedure uses a higher concentration concentration to be delivered to each test material. Filtration efficiency measurements can be determined up to> 99.9999%.

Increased Bacterial Filtration

Increased Bacterial Filtration Efficiency test determines filtration efficiency by comparing bacterial control numbers with test substance waste numbers. The test is carried out using Staphylococcus aureus as the challenge organism. A liquid suspension of S. aureus is aerosolized and introduced into the filtration medium at a constant flow rate of 30 liters per minute (LPM).

Aerosol droplets are collected in parallel in all glass impacts (AGI). Difficulty is given at one minute intervals and sampling from AGIs to clean the aerosol chamber is carried out for two minutes. The titre of the assay fluid is determined using standard plate count and / or membrane filtration techniques. The number of bacterial aerosol droplets that come into contact with the filter medium is determined by performing a test check without a filter medium in the test system. Difficulty controls are maintained in oluşturan 1 x 106 colony forming units (CFU) with an average particle size (MPS) of 3.0 ± 0.3 µm. This allows filtration efficiencies to be reported up to> 99.9999%.

The increased BFE test offers a number of advantages over other filtration efficiency tests. It has been used for years with little or no modifications and provides a standard reference for comparison of filtration materials. The increased BFE procedure is very repeatable, easy to do, and creates a more serious challenge than expected in most filtering devices.

Medical Mask Bacterial Filtration Efficiency Tester - BFE Detector

ASTM F2100, EN 14683, ASTM F2101

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