The ELPI®+ (Electrical Low Pressure Impactor) enables measurement of real-time particle size distribution and concentration in the size range of 6 nm – 10 μm with 10 Hz sampling rate. The ELPI®+ features include real-time stand-alone operation, wide sample concentration range, wide particle size range and robust structure for operation even in harsh conditions.

In addition to gaining real-time particle size distribution data, the ELPI®+ can be used for real-time particle charge distribution and for gravimetric impactor measurements. The use of impactor technology also enables post-measurement chemical analysis of size classified particles.


  • Wide particle size range: 6 nm – 10 μm
  • 14 particle size fractions
  • 10 Hz sampling rate
  • Possibility to collect size classified particles for chemical analysis
  • Wide operational concentration range
  • Independent stand-alone operation or control via laptop using ELPI®+VI software
  • Upgrade to advanced ELPI®+ versions possible


  • Suitable for wide range of particle measurement applications
  • Ideal tool for studying unstable concentrations and size distributions, and evolution of size distributions
  • Long term monitoring of e.g. air quality
  • Suitable for characterizing e.g. efficiencies of electrostatic precipitators (ESP) and pharmaceutical aerosols
  • Combustion studies
  • Occupational health and safety studies
  • Automotive exhaust measurements
  • Blow-by gas measurements
  • Particle charge distribution measurements
  • Filter grade efficiency studies
  • Nanotechnology
  • Pharmaceutical inhaler studies

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