INNOVATION
The aerosol generator ATM 228 is a further development of the aerosol generator ATM 226 and serves for the mobile generation of test and calibration aerosols from pure liquids, solutions and suspensions. The generator complies to all requirements of VDI 3491-2.
Aerosol generation is realised by a brushless com-pressor. Accordingly, no external compressed air supply is required. For the purpose of reproducible and long-term stable aerosol generation, the air flow rate is controlled via the pressure drop over the nozzle. This allows also a reproducible and stable generator operation even at very low air flow rates and thus also at lowest particle production rates.
Advantages
- Stable aerosol generation even at lowest particle production rates
- Safe and reproducible adjustment of operating points
- Suitable for mobile operation (internal compressor, optional battery operation mode)
- Remote control via serial interface (optional)
Applications
- Aerosol generation from pure liquids, solutions and suspensions
- Integrity and recovery testing of HEPA/ULPA filters according to ISO 14644-3
- Acceptance measurements for clean rooms, safety work benches and smoke detectors
- Generation of calibration aerosols (e.g.: for particle counters) at low air flow rates
Accessories
- Battery connection cable / interface cable
- Diffusion dryer (DDU 570/L, DDU 570/H)
- Aerosol substances (DEHS, PAO, PSL)
Principle
- For the dispersion of the substance to be aerosolised (aerosol substance), the ATM 228 is equipped with a two-substance nozzle designed by the Topas GmbH. The nozzle is operated within the aerosol substance (submerged operation mode) and consists of two inlet ports for the supply of air as well as aerosol sub-stance and one outlet port for the generated primary aerosol.
- The supply of a defined air flow rate causes a negative pressure at the nozzle inlet port for the aerosol substance. The aerosol substance flows thus into the dispersion zone of the nozzle, where aerosol substance and gas flow converge and form a droplet aerosol that passes the aerosol substance within bubbles. Finally, the droplet aerosol that leaves the generator is released due to bubble bursting at the liquid surface.
Specifications
- Air flow rate: 20 … 250 l/h
- Mass flow rate: 0 … 1,4 g/h (Continuously adjustable)
- Particle production rate 4,0×1006 … 1,4×1010 #/s (Continuously adjustable)
- Aerosol substances: DEHS, PAO (Emery 3004), paraffin oil, salt solutions, suspensions (PSL, A1)
- Substance capacity: 20 … 80 ml
- Non-stop operation: > 44 h
- Non-stop operation battery: ≤ 10 h (optional)
- Counterpressure: max. 40 kPa
- Aerosol outlet: hose fitting ∅ 8 mm
- Power supply: 100 … 240 VAC, 12 VDC
- Air supply: compressor
- Dimensions (w x h x d):300 x 120 x 195 mm
- Weight: 3,9 kg
