ATM 221/D Aerosol Generator
Atomizer Aerosol Generator ATM 221/D for aerosolisation of suspensions
The ATM 221/D Atomizer Aerosol Generator serves for the generation of aerosols from liquids, especially from suspensions.
The generation of polydisperse aerosols with increased quantities of supermicron particles (≥ 1 µm) is typically done by dust generators. An elegant and more precise alternative to dry dispersion is the aerosolisation of suspensions with subsequent drying. In light of this, the ATM 221/D was especially developed for the calibration and validation of PM sensors.
Standards
VDI 3491-2
CEN/TS 17660-2
CEN/TS 18086
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product sheet ATM 221/DBenefits
- removable dispersion unit for easy cleaning
- operation of dispersion unit away from base station (e.g. within thermostats)
- including magnetic stirrer for stabilisation and homogenisation of suspensions/solutions
- additional ball valve for start-stop operation at adjusted operational pressure
Applications
- calibration and validation of PM sensors and other aerosol technologies
- determination of fractional separation efficiency of filter elements and filter media
- material characterisation and research
The aerosolisation of the aerosol substance (pure liquid, solution or suspension) is realised within the ATM 221/D by a special two-substance nozzle.
A lower pressure at the aerosol substance inlet is initiated when a gas flow passes the nozzle. This causes an aerosol substance supply into the nozzle and afterwards to its dispersion (Venturi principle).
| Parameter title | Unit | Value |
|---|---|---|
| setting parameter | bar | pressure |
| setting range | bar | max. 6 |
| setting resolution | - | continuously adjustable |
| setting method | - | manual |
| aerosol, volumetric flow rate | L/h | 200 ... 750 (1 ... 6 bar) |
| aerosol, mass flow rate (aerosol substance) | g/h | 1,3 ... 3,7 (DEHS); 0.010 ... 0.025 (10 wt.-% ISO A1, after drying) |
| operating medium, aerosol substance | - | liquids (DEHS, PAO, ...), solutions (NaCl, KCl, ...), suspensions (ISO A1, PSL, ...) |
| operating medium, aerosol substance - filling volume | mL | max. 400 |
| operating medium, gas/air | - | dry, particle-free compressed air or pressurised inert gas |
| hose connector | mm | Ø 8 (outer diameter) |
| dimensions (w × h × d) | mm | 250 × 300 × 200 |
| weight | kg | 4,7 (without magnetic stirrer 4,4) |
- diffusion dryer (DDU 570/L, DDU 570/H)
- ultrasonic desintegrator (UDS 751)
- aerosol substance (DEHS)
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