ASTM F2299 Particulate Filtration Efficiency (PFE)
- Measures the initial particulate filtration efficiency of materials used in medical facemasks.
- Aerosol: Latex spheres (PSL) (0.1 µm typically).
- Face Velocity (i.e., flow rate/test area): 0.5 to 25 cm/s.
- ~11 liters per minute used at Kinectrics.
- Optical particle counter used to determine upstream and downstream concentrations.