PM 2.5 Air Monitoring Filters, Whatman™ - 462mm - 7592-104

Low chemical background filters permit sensitive, interference-free determinations. For US EPA PM 2.5 Ambient air monitoring. With high-purity, thin PTFE membranes. Chemical resistant, sequentially numbered polypropylene support rings. Low Tare mass provides for accurate gravimetric determinations. Thermally stable design eliminates curling, keeping the membrane flat. Filter thickness: 40µm. Pore size: 2 µm. Manufactured under cleanroom conditions without any glues or adhesives.