Electrostatic Aerosol Neutralizer EAN 5810 pages

Electrostatic Aerosol Neutralizer
Series EAN

Special Advantages
•

Controllable generation of ions

•

Separate adjustment of both positive and
negative ion sources

•

No radioactive source

•

Easy to integrate into existing filter test
systems and other test apparatus

Principle

Electrostatic Aerosol Neutralizer EAN 581

The mechanical interaction of particles, especially
solid ones, may cause undesirable levels of
electrostatic charge. Test dusts must be
generated with a high degree of reproducibility for
instance when evaluating aerosol separation
techniques such as cyclones, filters or impactors.
Comparable results can only obtained at
controlled and similar charge levels.
The electrostatic aerosol neutralizer EAN 581
conditions the charge distribution on test dusts as
well as other aerosols. Charge equilibrium can be
controlled by mixing positive and negative ions in
a precise manner.
Applications
•

Effective, controllable aerosol neutralization

•

Particle charging in a definite manner

•

Reproducible evalutation of aerosol
separation techniques and filtration
efficiencies

•

Quality assurance

•

Fundamental aerosol research

The EAN 581 is based on the corona discharge
principle and consists of a mixing chamber with
two separate ionization heads and a control unit.
Positive and negative ions are generated by the
two ion blowers and consecutively mixed into the
aerosol stream in the mixing chamber. A source of
compressed, particle free air is connected to both
of the ionization heads and mains voltage applied
to the power cord.
The special design of the mixing chamber
guarantees nearly ideal mixing conditions allowing
the highest (dis)charging efficiency. The exchange
of air ions onto the surface of the particles causes
changes in the final charge remaining on the
particle as it leaves the unit.
Compressed Air 2

Aerosol Inlet

Ionisation
Head 2

Mixing Chamber

Aerosol Outlet

Ionisation
Head 1
Compressed Air 1

Mixing Chamber with Ionization Heads (Ion Blower)

The control unit supplies high voltage and a
constant ionization current to the ion blower.
Operating voltage and ionization current are
displayed on the control unit front panel in kV and
µA for precise and reproducible adjustment.