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ATM 220

Atomizer Aerosol Generator ATM 220 for aerosol generation from liquids, compressed air operated, base model with broad operational range

Aerosol generators of series ATM 220/226 are especially for cleanroom and filter test applications for years highly appreciated by our customers.

Function test at laminar flow boxes (DIN EN 12469), the qualitative test of filters for suspended matter (filter leack test of HEPA and ULPA filters), and acceptance measurements in clean rooms (according to DIN EN ISO 14644 and VDI 2083) are an essential necessity for personal security and product safety.
Atomizer Aerosol Generator ATM 220 frontside Atomizer Aerosol Generator ATM 220 with Diffusion Dryer DDU 570
For such measurements the VDI 3491-2 proposes an aerosol generator for producing a test aerosol with defined characteristics, like the ATM 220.

By high generated particle numbers at a particle size distribution oriented at the Most Penetration Particle Size (MPPS) of the filter the locating of leaks in the system is possible fast and safe. Using an oily aerosol substance the aerosol generator produces spherical particles mainly in the size range 0,1 … 0,5 µm with a calculable residence time. That does nearly not extra contaminate the filter material.

A further range of application for aerosol generators is calibration of measuring devices and visualization of air flows. That enables measurements of local velocities and flow profiles of the tracer particles by means of optical methods.


VDI 3491-2
VDI 4258-1
ISO 21083-1
Interested? We will gladly advise you

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  • polydisperse aerosol, mainly submicron (< 1 µm)
  • long-term stable generation of aerosols
  • adjustable particle production rate
  • integrated valve for on/off aerosol generation


  • aerosol generation from pure liquids, solutions and suspensions
  • fractional efficency testing of filter media and filter elements
  • generation of long-term stable test and process aerosols
  • calibration and validation of particle measurement techniques

The atomizer is the key part of the ATM 220. It is made of high quality stainless steel and works as a two-stream nozzle, based on the injection principle. The unique feature is that the outlet points towards the wall of the glass vessel which works as the baffle plate. This particle impaction section removes coarse spray droplets and results in a particle size distribution mainly below 1 µm. Depending on the flow rate, the cut point of the impactor varies, but this has quasi no impact on the submicrometer range of the particle size distribution of the aerosol. The air is cleaned by a HEPA-filter before it is introduced to the atomizer.

Parameter title Unit Value
setting parameter - pre-pressure
setting range bar 0,5 ... 6,0
setting resolution - continously adjustable
volumetric flow rate, aerosol L/h 50 ... 250
aerosol, mass flow rate (aerosol substance) g/h max. 2
aerosol, particle production rate #/s > 2 × 10¹⁰ (> 0,02 µm)
aerosol, particle size range µm 0,01 ... 5
aerosol, distribution width (geometric standard deviation) - 1,8 ... 2,2 (polydispers)
operating medium, gas/air - dry, particle-free compressed air or pressurised inert gas
operating medium, gas/air - compressed air supply bar max 6
operating medium, aerosol substance - pure liquids (DEHS, PAO, DOP, ...), solutions (salts, ...), suspensions (PSL, ...)
operating medium, aerosol substance - filling volume mL 10 ... 80
environmental condition, max. counterpressure kPa max. 20
environmental condition, temperature °C 0 ... 50
hose connector, outlet mm Ø 8 (outer diameter)
dimensions (w × h × d) mm 260 × 175 × 220
weight kg 3,3
  • Kretzschmar, B.S.M.; Bergelt, P.; Göhler, D.; Firmbach, F.; Köcher, R.; Heft, A.; Stintz, M. & Grünler, B. Modulation of silica layer properties by varying the granulometric state of tetraethyl orthosilicate precursor aerosols during combustion chemical vapour deposition (CCVD) Aerosol Sci. Technol. 54 (2020) 10, 1124 - 1134
  • Frijns E., Verstraelen S., Stoehr L. C., Laer J. V., Jacobs A., Peters J., Tirez K., Boyles M. S. P., Geppert M., Madl P., Nelissen I., Duschl A. and Himly M. A Novel Exposure System Termed NAVETTA for In Vitro Laminar Flow Electrodeposition of Nanoaerosol and Evaluation of Immune Effects in Human Lung Reporter Cells Environ. Sci. Technol. 51 (2017) 9, 5259 - 5269
  • Fiala P., Göhler D., Wessely B., Stintz M., Lazzerini G. M. and Yacoot A. Evaluation of preparation methods for suspended nano objects on substrates for dimensional measurements by atomic force microscopy Beilstein J. Nanotechnol. 8 (2017) 0, 1774 - 1785
  • Göhler, D.; Große, S.; Bellendorf, A.; Falkenstein, T.A.; Ouaissi, M.; Zieren, J.; Stintz, M. & Giger-Pabst, U. Hyperthermic intracavitary nano-aerosol therapy (HINAT) as improved approach for pressurised intraperitoneal aerosol chemotherapy (PIPAC): Technical description, experimental validation and first proof of concept. Beilstein J. Nanotechnol. 8 (2017) 0, 2729 - 2740
  • Tarik M., Foppiano D., Hess A. and Ludwig C. A Practical Guide on Coupling a Scanning Mobility Sizer and Inductively Coupled Plasma Mass Spectrometer (SMPS-ICPMS) J. Vis. Exp. 125 (2017) 0, e55487
  • Zeng L. and Weber A. P. Aerosol synthesis of nanoporous silica particles with controlled pore size distribution J. Aerosol Sci. 76 (2014) 0, 1 - 12
  • Deng, Y. and Inomata, S. and Sato, K. and Ramasamy, S. and Morino, Y. and Enami, S. and Tanimoto, H. Temperature and acidity dependence of secondary organic aerosol formation from alpha-pinene ozonolysis with a compact chamber system Atmos. Chem. Phys. 21 (2021) 8, 5983 - 6003

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