ATM 221 Aerosol Generator
Atomizer Aerosol Generator ATM 221 for aerosol generation from liquids, compressed air operated, base model with submerged nozzle
Standards
Benefits
- generation of polydisperse aerosols, mainly submicron (
- long-term stable generation of aerosols
- low aerosol ejection due to head purging and submerged nozzle
Applications
- aerosol generation from pure liquids, solutions and suspensions
- fractional efficiency testing of filter media and filter elements
- generation of long-term stable test and process aerosols
- calibration and validation of particle measuring 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. The air is cleaned by a HEPA-filter before it is introduced to the atomizer.
At the aerosol generator ATM 221 the nozzle is immersed in the liquid in order to ensure setting of small mass flows with a very high reproducibility.
| Parameter title | Unit | Value |
|---|---|---|
| setting parameter | - | system pressure |
| setting range | bar | max 2,5 |
| setting resolution | - | continously adjustable |
| setting method | - | manual |
| aerosol, volumetric flow rate | L/h | 50 ... 130 |
| aerosol, mass flow rate (aerosol substance) | g/h | max. 0,6 |
| operating medium, aerosol substance | - | liquids (DEHS, PAO, DOP, ...), solutions (salts, ...), suspensions (PSL, ...) |
| operating medium, aerosol substance - filling volume | mL | 40 ... 80 |
| operating medium, gas/air | - | dry, particle-free compressed air or pressurised inert gas |
| operating medium, gas/air - compressed air supply | bar | max. 8 bar |
| environmental condition, max. counterpressure | kPa | 20 |
| aerosol generation principle | - | submerged Collison two substance nozzle |
| hose connector, outlet | mm | Ø 8 (outer diameter) |
| dimensions (w × h × d) | mm | 220 × 270 × 150 |
| weight | kg | 1,9 |
- Aerosol liquid DEHS
- further aerosol liquids e.g. PAO (Emery 3004) on request
- diffusion dryer (DDU 570/L, DDU 570/H)
-
Lampimäki M., Baalbaki R., Ahonen L., Korhonen F., Cai R., Chan T., Stolzenburg D., Petäjä T., Kangasluoma J., Vanhanen J., Lehtipalo K. Novel aerosol diluter – Size dependent characterization down to 1 nm particle size Journal of Aerosol Science 172 (2023) 106180,
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Musavi Z., Zhang Y., Robert E., Engvall K. Experimental and numerical investigation of flow field and soot particle size distribution of methane-containing gas mixtures in a swirling burner ACS OMEGA 7 (2022) 1, 469 - 479
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Mendes L., Eleftheriadis K., Biskos G. Performance comparison of two thermodenuders in Volatility Tandem DMA measurements Journal of Aerosol Science 92 (2016) 2, 38 - 52
dx.doi.org/10.1016/j.jaerosci.2015.10.002
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