Aerosol Generators for liquids

All airborne particles, e.g., droplets, dust, pollen, etc., within the size range of approx. 1 nm –100 µm are called aerosols. Defined test aerosols made up of droplets are required to enable a clear comparison of the performance of filters and particle measurement devices, for example.

Palas aerosol generators and liquid nebulizers are highly successful worldwide due to their unique advantages, including high dosing constancy, easy handling, long lifetime, and reliable, economical, and reproducible operation. All Palas aerosol generators meet the stringent requirements of VDI guideline 3491.

To perform practical analyses and comparisons, droplet aerosols must be generated from liquids also used in the real world. Fluids, such as water, DEHS, motor oils, white oil, etc., differ significantly in viscosity, surface tension, and density.

As a result, Palas offers aerosol generators for liquids based on various atomization methods for different applications. Test aerosols can be generated within a particle size range of approx. 10 nm – 10 µm and mass flows ranging from a few mg/h to more than 100 g/h. Monodisperse or polydisperse test aerosol particle size distributions can be generated depending on the model and aerosol substance.

AGF Systems

The AGF series features a robust design, easy handling, and a long lifetime. It combines a binary nozzle with a downstream cyclone. The AGF 2.0 is equipped with a cyclone with a cut-off diameter of dCut-off = 2 µm; the AGF 10.0 is equipped with a cyclone with a cut-off diameter of dCut-off = 10 µm.

The maximum particle concentration of the AGF series is approx. 107 particles/cm3. The cyclone can calculate the max. particle size, regardless of the liquid.

Large droplets generate high mass flows and may contaminate filters, for example, to such an extent that droplet loading causes the filters to be evaluated as better than they are during filter testing.

The AGF series is successfully used to generate test aerosols, in clean room technology applications, to test compressed air filters, and for LDV measurements.

The AGF 10.0 is an aerosol generator for atomizing liquids and latex suspensions with a constant particle rate and defined particle spectrum with binary nozzle and cyclone (cut-off: 10 µm) as per VDI 3491-6

The AGF 2.0 system comprises an adjustable binary nozzle to adjust the desired mass flow and a cyclone with a cut-off of 2 µm. As a result, virtually no particles > 2 µm are generated

The AGF 3000 was specially developed to supply compressed air filters per ISO 12500 until the compressed air filter is saturated. The AGF 3000 system comprises an aerosol generator and an automatic refill unit.

The AGF 3000 is equipped with a binary nozzle developed by Palas®, which can also achieve high mass flows of up to 29 g/h. The AGF 3000 aerosol generator is designed to be pressure-resistant with 10 bar inlet pressure and 7 bar outlet pressure.

AGF 10.0 Liquid aerosol generator
AGF 2.0 Liquid aerosol generator
AGF 3000 Liquid Aerosol generator

MAG 3000

Aerosol generator for the generation of monodisperse and uncharged droplets, dp = 0.2 – 8 µm

The MAG 3000 operates based on the Sinclair-LaMer principle (1943). It comprises a core source to generate condensation cores with a particle diameter of approx. 85 nm, a vaporizer to vaporize the particle-forming material, a reheating unit, and a condensation flue, in which the particle-forming material condenses on the condensation core. The condensation process here is heterogeneous.

The MAG 3000

Palas PLG 1000 Cold Atomizer Aerosol Generator

The Palas PLG 1000 is a cold atomizer intended for use in air-conditioned rooms. If the room is unable to be air-conditioned, then a heated device should be used such as the Palas PLG 2000-H. The liquid to be dispersed is filled in the reservoir. The nozzle system developed by Palas is immersed in the liquid. This nozzle system is based on the Laskin principle and guarantees extremely precise dosing consistency with uniform particle size. The mass flow is adjusted using the volume flow through the nozzle. The volume flow is controlled by a pressure regulator and a manometer on the device.

Palas PLG 1000 Brochure 2023
Palas PLG 2000 Brochure 2023
Palas PLG 2100 Brochure 2023

Palas UGF 2000 Liquid Nebulizer

The Palas UGF 2000 aerosol generator is able to atomize liquids with a binary nozzle. The UGF 2000 incorporates an adjustable binary nozzle for the adjustment of the desired mass flow and a cyclone. Unlike the AGF series, the UGF 2000 has a cyclone with built-in control air. The control air is adjusted using a micrometer screw on a needle valve. By opening this valve, the aerosol concentration is able to be reduced by a factor of approximately 500 through the addition of control air. As a result, the generator is ideally suited for testing laminar flow boxes and clean rooms with low volume flow.

Palas UGF 2000 Aerosol Generator

Palas PAG 1000 Battery Powered Generator

The Palas PAG 1000 is a battery powered autonomous portable aerosol generator which offers maximum flexibility for the generation of droplet sized aerosols, from liquids such as DEHS, especially also at low concentrations. The generator is small and weights only 5 kg. Being battery-powered makes it independent and ready for quick and easy deployment and use in the field. The fact that no compressed air connection is required demonstrates its flexible application options even more. A battery charge is sufficient for one working day and if needed, the device also operates on 240 VAC mains.

Palas PAG 1000 Brochure 2023

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