美國 Sterlitech EPA PM 2.5 PTFE Filters, 46.2mm; 50/Pk PTFE 濾膜
PM 2.5 PTFE 膜過濾器專為 PM 2.5 環境空氣監測而設計。這些高純度、薄過濾器按順序編號，并帶有耐化學腐蝕的聚丙烯支撐環。
規格：
EPA PM2.5空氣監測膜過濾器規范
| Alkalinity Max. | 25 μeq/g of filter Test Method:?Section 2.12 EPA/600/R-94/038b |
| Complete Packsize | 50 Pieces |
| Material | Polytetrafluoroethylene (PTFE) |
| Particle Retention [0.3 μm] Min. | 99.7% Test Method:?ASTM D 2986-95a |
| Pore Size | 2 μm |
| Support Ring | Yes |
| Support Ring Material | Polypropylene (PP) |
| Support Ring Width | 3.68 mm ± 0.00 to 0.51 |
| Total Support Ring Thickness | 0.38 mm ± 0.04 |
