Tokyo Glass Kikai (TGK) PM2.5 Air Monitoring Filter 996-41-07-11 1case(50pcs)

A US EPA certified filter developed for PM2.5 weight measurement. -With a PP support ring that is convenient to handle, no adhesive or adhesive is used.・ Weight fluctuations due to humidity and temperature changes are all within the EPA regulations. -Since each filter has a continuous number, tracking is easy. -Since it is produced in a clean room, particle contamination is also within the EPA regulations.Filter material-PTFE, support ring material-PP, thickness -40 ± 10 μm, collection efficiency- 99.7% (according to 0.3 μm DOP test), weight change due to humidity-<10 μg when humidity 35-40%, maximum pressure drop -30cmH2O coL., 16.67L / min, Weight fluctuation-≦ 20μg, Particle contamination-≦ 20μg, Stability due to temperature change -40 ± 2 ℃ heating <20μg