The DLPI+ (Dekati® Low Pressure Impactor) is a 14-stage cascade impactor that is used to determine airborne particle mass size distribution. The DLPI+ classifies and collects particles into 14 size fractions in the range of 16 nm – 10 μm. In each size fraction, 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. A chemical analysis of the size classified particles can also be performed. The DLPI+ impactor can be used in  various particle measurement applications and can the high temperature version of the DLPI+ can also be heated up to 180 °C for direct sampling of high temperature aerosols. Since the DLPI+ impactor has the same design as the impactor used in the Dekati® ELPI®+ (Electrical Low Pressure Impactor), it can easily be upgraded into a full ELPI®+ system for real-time particle size distribution measurements.


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Features of the low pressure impactor

  • Gravimetric or chemical analysis of the size classified samples
  • Particle size distribution in 14 size fractions 16 nm – 10 μm
  • 10 lpm sample flow rate
  • Particle collection area Ø25 mm
  • Well characterized impactor with low inter-stage particle losses
  • Integrated impactor low pressure (40 mbar) measurement and adjustment, no flow control needed
  • Can be upgraded into a complete ELPI®+ system for real-time data
  • HT-DLPI+ for high temperature measurements available
  • Stainless steel stages for operation even in harsh environments