Aerosol Spectrometers » Inas® system

Measurement system for particle size and concentration analysis of individual spray bursts of inhalers (MDI and DPI)

Applications
  • Characterization of spray and nebulizer nozzles
  • Characterization of inhalation aerosols in accordance with the European Pharmacopoeia with 15 l/min, 30 l/min or variable flow rates
  • Characterization of inhalation aerosols in accordance with the European Pharmacopoeia with variable flow rates up to 100 l/min controlled by the differential pressure
  • Measurement of MDIs, nebulizers and PDIs
Applications
  • Characterization of spray and nebulizer nozzles
  • Characterization of inhalation aerosols in accordance with the European Pharmacopoeia with 15 l/min, 30 l/min or variable flow rates up to 40 l/min
  • Measurement of MDIs and nebulizers

The Inas® system was developed in cooperation with the Christian Albrecht University in Kiel (Germany). With Inas®, for the first time individual spray bursts from inhalers can be reliably analysed with a temporal resolution of 10 ms with respect to the particle size distribution and particle concentration.

Benchmarking results with impactors (NGI) and Fraunhofer spectrometers are described in the dissertation from Maren Kuhli, Kiel 2009. The Inas® is based on the welas® digital system. This counting measurement method guarantees very good size resolution and size classification accuracy. Inas can measure concentrations > 107 particles/cm3 and can be operated with variable exhaust flow rates of up to 100 l/min.

The Inas® is the tool for fast and reliable quality assurance and for developing new inhalers.

Differences of the Inas® models

  Inas® 100
Inas_100_mit_welas_copley
Inas® 40
Inas_40_mit_welas
Measurement range (size) 0.2 - 40 µm (3 measurement ranges) 0.2 – 40 µm (3 measurement ranges)
Volume flow
15 l/min (nebulizer), 30 l/min (MDI), variable flow rate up to 100 l/min (DPI) controled by differential pressure according to the European Pharmacopoeia

15 l/min (nebulizer), 30 l/min (MDI) according to the European Pharmacopoeia
Dimensions Top part: 600 • 260 • 170 mm, desktop case: 190 • 450 • 370 mm Top part: 600 • 260 • 170 mm, desktop case: 190 • 450 • 370 mm
Weight
approx. 25 kg

approx. 25 kg

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