PM2.5 Environmental Particulate Sampling ePTFE Membrane Filter with PP Ring 46.2 mm, Pack of 25. Sold in the configuration options listed below; specifications are as published by the manufacturer.
Specifications
Intended Use for: Environmental Particulate Sampling
Filter Format: Disc
Membrane Color: White Plain
Diameter: 46.2 ± 0.25 mm
Pore Size: 2.0 μm
Thickness: 30 ± 15 μm
Particle Retention Rate (0.3 μm): >99.995%
Pressure Drop@16.671/min: 30 mm H2O
Alkaline: <25 μeq/g
Thermal weight stability: <20 μg
Wettability: Hydrophobic
Membrane: Expanded Polytetrafluorethylene (ePTFE)
Support Ring: Polypropylene (PP): Width 3.7 ± 0.2 mm, Thickness 420 ± 60 μm