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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