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          PTFE Membrane for PM2.5 Air Monitoring


          Cobetter PM2.5 PTFE membrane filter is especially designed for PM2.5 air sampling.

          It is made by high purity PTFE film, structured a thin flat filter with pp support ring, for better handling.

          Low element background, very good chemical compatibility makes the ring supported PTFE filter very widely used in ambient air monitoring.

          Cobetter PP ring supported PTFE filters are produced in ISO7 clean room. Membrane printed with sequential numbers for easy recording and tracing.


          · Conforms to EPA PM2.5 reference method under the requirements for 40 CFR part 50 Appendix L

          · Manufactured under clean room

          · No glues or adhesives

          · Used for PM2.5 ambient air monitoring

          · Sequentally numbered for easy traceability

          Typical Membrane Performance

           Part NumberDiameterSpecification
           PM2.5PF-46.246.2mmFilter MaterialTeflon25 pcs



          Pore Size2μm

          Support Ring mediaPP/PFA


          Retention Rate>99.995%

          Pressure Drop(0.3μm)@16.671/min<30mm H2O


          Temperature until weight stable<20μg

          Weight dropped to stability<20μg

          Max. Hygroscopic<10μg

          Ordering Information

           Part NumberSizeCore DiameterPackage
           PMPF402040mm * 20mm50.8mm/40mm1 Roll
           PMPF352035mm * 20mm50.8mm/40mm1 Roll
           PMPF303030mm * 20mm50.8mm/40mm1 Roll

          For technical data sheet or application inquiry, you are more than welcome to contact our sales representative by sales@cobetterfilter.com or leave a message