T437 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 the downstream residual concentration of the tested medical face mask materials. The tester provides a 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.

Click Here to Download Brochure   
  • Double six-stage Anderson microbial sampler test systems with contrast sampling tests provide high accuracy.
  • Internal aerosol generator provides stable and adjustable microbial aerosol flow. Internal pump can adjust the flow rate.
  • Equipped negative pressure test chamber to ensure the safety of operators. Equipped light system to make the operations more clear and easy to do.
  • 10.4 Inch touch screen control panel is easy to operate and supports USB data transmission.
  • Equipped leakage protection and operating window provide better operating view and safety operating conditions.
  • Stainless steel chamber with insulation and fire retardant lining is stable and reliable.

EN 14683 Medical face masks-Requirements and test methods.

ASTM F2101 Standard Test Method for Evaluating the Bacterial Filtration Efficiency (BFE) of Medical Face Mask Materials, Using a Biological Aerosol of Staphylococcus aureus.

ASTM F2100 Standard Specification for Performance of Materials Used in Medical Face Masks.

YY 0469 Technical requirements for surgical mask.


Item Detail
A Anderson sampler 28.3l/min, 0.1l/min
Aerosol fluid 8-10l/min, 0.1l/min
Pump 0.006-3.0ml/min, 0.001ml/min
Pressure for A Anderson sampler -20-0kPa,0.01kPa
Pressure for B Anderson sampler -20-0kPa,0.01kPa
Pressure for chamber -90–120kPa
Flow rate for ventilating 5m3/min
HEPA filtration ≥99.99% for particle over 0.3μm
Diameter for aerosol 3.0±0.3μm
Capture diameter for Anderson sampler I grade >μm, II grade(4.7-7)μm, III grade(3.3-4.7)μm, IV grade(2.1-3.3)μm, V grade(1.1-2.1)μm, VI grade(0.6-1.1)μm
CFU 2200±500cfu
Power supply 220 AC 50Hz
Dimension 1200mm x 700mm x 2200mm
Net weight 210 kg


No. Product
2043701 Bacterial Filtration Efficiency Tester

Download Flexitest Brochure