The HT-DLPI+ (High Temperature Dekati® Low Pressure Impactor) is a 14-stage cascade impactor that is used to determine airborne particle mass size distribution. The HT-DLPI+ can be heated up to 180 °C allowing direct measurement of up to 180 °C aerosol samples without the risk of condensation or sample transformations. The impactor support and heater controller are all integrated into one easy-to-use unit, which also allows control and adjustment of the impactor low pressure and flow rate. The HT-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. Since the HT-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®+ or High Temperature ELPI®+ system for real-time particle size distribution measurements.

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Features of the cascade 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 heater, heater controller and low pressure (40 mbar) measurement, no additional flow control needed
  • Sampling from up to 180 °C
  • Can be upgraded into a complete ELPI®+/HT-ELPI®+ system for real-time data
  • Stainless steel stages for operation even in harsh environments