Medical Masks bacterial filtration efficiency tester


Medical Masks bacterial filtration efficiency 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.

Application

This machine is suitable for metrological verification departments, scientific research institutes, mask manufacturers and other relevant departments to measure the bacterial filtration efficiency (BFE) of medical face mask materials.

Standards

YY 0469-2004 Technical requirements for surgical mask

BS EN 14683-2014 Medical face masks - Requirements and test methods

ASTM F2100-2019 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

Features

1. Professional negative pressure biological safety cabinet technology to ensure the safety of operators and the environment.

2. High negative pressure working cabin, two-stage high-efficiency filter, 100% safe discharge.

3. Adopt two-way six-level Anderson precise sampling.

4. Built-in peristaltic pump with adjustable flow rate.

5. Special microbial aerosol generator, the flow rate of bacterial liquid spray is adjustable, and the atomization effect is good.

6. Industrial-grade large color touch screen control, the operation is simpler.

7. The control system adopts PLC + LabView control, high-intensity color touch screen 10 inches, USB interface, supports U disk data transfer;.

8. The safety cabinet has built-in LED lighting for easy observation.

9. Built-in ultraviolet disinfection lamp to enhance the protection effect.

10. The front switch type sealed glass door is convenient for operation and observation.

11. With operating software, it can be controlled and processed by computer.

12. Seamlessly connect the laboratory information management system.

Parameters

Sampling flow rate of Path A

28.3L/min

Sampling flow rate of Path B

28.3L/min

Nebulization flow rate

(8~10)L/min

Peristaltic pump flow rate

0.006~3mL/min

Negative pressure of aerosol chamber

-90~-120Pa

Negative pressure of cabinet body

(-50~-200)Pa    

Andersen

I>7μm, II. 4.7-7μm, III. 3.3-4.7μm, IV. 2.1-3.3μm, V. 1.1-2.1μm

VI. 0.6-1.1μm

Size of glass aerosol chamber

L600×diameter85Xthick3)mm

Outer Dimension

1180*650*1300cm(L*W*H)mm

Power supply

220V 50Hz

 

FAQ

1. What is this product?

The Bacterial Filtration Efficiency (BFE) Tester evaluates the bacterial filtration performance of medical mask materials. It measures the ratio of bacterial concentration upstream versus downstream of the mask, providing objective and quantitative assessment of mask protective capability against microbial aerosols.

2. What is it used for?

The instrument is used by mask manufacturers, research institutes, metrological verification departments, and third-party testing labs to determine BFE of surgical masks, disposable medical masks, and N95/FFP masks, supporting quality control, certification, and product development.

3. How does it work?

A bacterial aerosol is generated and directed through a mask sample in a controlled negative-pressure chamber. Upstream and downstream bacteria are simultaneously collected using a dual-path six-stage Anderson sampler. Colony-forming units (CFU) are incubated and counted to calculate filtration efficiency. The process follows standards such as ASTM F2101. ASTM F2100. BS EN 14683. and YY 0469.

4. Why is it important?

BFE is a critical parameter for medical masks to prevent pathogen transmission. Accurate testing ensures masks meet regulatory and clinical protection requirements, enabling reliable quality control and product development for healthcare applications.