GRAVIMETRIC PARTICLE SIZE DISTRIBUTION WITH DLPI+

The Dekati® Low Pressure Impactor (DLPI+) is a widely used and well characterized cascade impactor for detailed particle size distribution analysis. This impactor gives information on particle size distribution in 14 size fractions 16 nm – 10 µm. The size classified particles can be collected on different material substrates for either gravimetric or chemical analysis. The DLPI+'s robust contruction makes it a reliable choice even for long term monitorin in different environments.

Each individual DLPI+ impactor unit is calibrated for exact flow rate and impactor stage cut points to ensure accuracy of the measured data. The DLPI+ design is the same as in the impactor used in the ELPI®+ (Electrical Low Pressure Impactor) enabling an easy upgrade from DLPI+ into a full ELPI®+ system for real-time particle size distribution measurements.

The DLPI+ setup in air quality measurements is simple and includes the DLPI+ unit and a vacuum pump. The DLPI+ unit has an integrated low pressure measurement and control so no additional flow control is needed. The particles can be collected on different material substrates for either gravimetric or chemical analysis of the size classified particles. Dekati can offer aluminium and polycarbonate substrates for this purpose. All accessories for a complete setup are available from Dekati Ltd.

 

DLPI+ features:

  • Wide particle size range; 16 nm – 10 μm
  • Particle size distribution in 14 size fractions
  • 10 lpm sample flow, Classic DLPI available for 30 lpm
  • Integrated impactor low pressure measurement and adjustment
  • Gravimetric, chemical or SEM/TEM analysis of size classified particles
  • Stainless steel stages for operation even in harsh environments
  • Sampling from up to 180 °C with High Temperature DLPI+
  • Robust, stainless steel construction
  • Excellent calibration data*
  • Can be ugraded into a full ELPI®+ system for real-time data
  • Complete measurement solutions for different types of measurement applications available from Dekati Ltd.

* Järvinen, A., Aitomaa,M., Rostedt, Al., Keskinen, J. & Yli-Ojanperä, J. 2014. Calibration of the new electrical low pressure impactor (ELPI+). 2014. J. Aerosol Sci. 69, pp. 150-159.