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DLPI (Dekati® Low Pressure Impactor) is a cascade low pressure impactor to classify airborne particles into 13 size fractions. The size classification is made from 30 nm up to 10 µm with evenly distributed impactor stages. Additional back-up filter can be used to collect particles smaller than 30 nm. The impactor is available with 10 and 30 l/min sample flow rate.
DLPI has 13-stages so particles are size classified into 13 size fraction inside the unit. The particles are collected on 25 mm collection substrates that are weighed before and after the measurement to obtain gravimetric size distribution of the particles. Other DLPI characteristics include low inter-stage wall-losses and robust yet easy-to-use operation. The rigid stainless steel construction of the DLPI makes it suitable for a wide variety of applications including power plant and vehicle emission measurements, engine blow-by measurements, air quality studies and pharmaceutical aerosol device testing. The DLPI impactor has the same design as the impactor used in the real-time particle size distribution measurement device ELPITM(Electrical Low Pressure Impactor) which enables an easy upgrade of the DLPI into an ELPITM.
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