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Thumbnail Filmstrip of PM2.5 PTFE Membrane Filter, 46.2mm, 2.0µm, Sequentially Numbered, 50/pack Images
EPA-compliant PM2.5 PTFE membrane filters designed for high-precision ambient air quality monitoring. These 2.0 µm pore size filters feature a 46.2mm diameter PTFE membrane with chemically resistant polypropylene support rings. Each filter is individually numbered in sequential ascending order for accurate sample tracking and chain-of-custody protocols.
Advanced Support Ring Design
The polypropylene support ring provides structural integrity and prevents membrane sagging under vacuum or pressure differentials, ensuring uniform flow distribution across the entire filter surface. This design enables robotic handling and automated sampling systems while maintaining the membrane's flat profile throughout the sampling period.
- Pore Size: 2.0 µm
- Diameter: 46.2mm
- Material: High-purity PTFE with polypropylene support ring
- Temperature Stability: Tested at 40°C ±2°C for 48 hours per EPA requirements
- Weight Change: Average change less than 20 µg after temperature testing
EPA Compliance and Applications
These filters conform to EPA PM2.5 reference method requirements under 40 CFR Part 50, Appendix L. Designed for gravimetric analysis of fine particulate matter in ambient air monitoring, source emission testing, and industrial hygiene applications.
Low element background and excellent chemical compatibility ensure reliable results in diverse environmental conditions. Thermally stable design with integrity testing capability supports quality assurance protocols required for regulatory monitoring programs.
Compatibility and Usage
Compatible with EPA-designated PM2.5 reference samplers and equivalent methods. The 46.2mm diameter fits standard filter holders used in high-volume and medium-volume air samplers. Sequential numbering facilitates sample identification and reduces tracking errors in multi-sample studies.
Each package contains 50 individually numbered filters, providing cost-effective bulk supply for routine monitoring operations while maintaining traceability for regulatory compliance documentation.