MODEL 7811


Universal Aerosol Generator

This model has two pumps inside, one for the flow through a nebulizer (generating aerosol raw concentration) and a second pump which provides dry air for optional diluting and drying of the raw aerosol (using a Silica gel dryer).
Both flow rates can be controlled and switched on/off independent from each other with two switches and potentiometers on the front side of the instrument. The dryer is located at the front side and can be removed for Silica gel regeneration or replaced by standard tubing in case no drying is necessary or wanted. A flow meter allows monitoring of the “dry-air-flow”.

Up to six nebulizers can be stored inside the removable cover on the instrument´s backside.


  • generation of aerosols from all kinds of liquids, suspensions and solutions e.g. NaCl, DEHS, PSL
  • integrated pumps
  • no compressed air needed
  • independently controllable flows (nebulizer flow and dry air flow)
  • suitable for small liquid volumes


  • Generating aerosols from all kind of liquids, suspensions and solutions
  • DEHS max. concentration > 107/cm3
  • Monodisperse PSL-suspension ~50 nm to ~2 μm
  • NaCl solutions
  • Calibration and testing
  • Inhalation studies
  • inhalation and toxicology studies
  • Filter testing


particle generation method


particle concentration

dependent on material (e.g. DEHS > 107 p/cm³)

outlet aerosol flow rate nebulizer

~ 2.5 - 7.0 L/min; dryer: ~ 7.5 - 17 L/min

power supply

100 – 240 VAC / 50 – 60 Hz / 1.7 A

air supply

two integrated pumps (two controllable flows)

maximum altitude

2,000 m (6,500 ft)

ambient temperature

0 – 40°C (32 – 104°F)

ambient humidity

0 – 90% RH, non-condensing

size (h x w x d)

32.5 x 31 x 28 cm (12.8 x 12.2 x 11 in)


11 kg (24.3 lbs)

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