Dekati Low Pressure Impactor

DLPI (Dekati Low Pressure Impactor) is a cascade low pressure impactor to classify airborne particles into 13 size fractions from 30 nm up to 10 μm with evenly distributed impactor stages. An additional back-up filter can be used to collect particles smaller than 30 nm. The DLPI has a flow rate of 30 l/min with 50% stage cut off Equivalent Aerodynamic Diameters (EAD) at 0.029, 0.056, 0.095, 0.158, 0.264, 0.383, 0.610, 0.939, 1.577, 2.354, 3.928, 6.471, 9.769 μm. The inlet instrument is placed at about 2 m above ground level and coupled with a rotating pump for air sample suction, allowing aerosol mass size distribution measurements.