1–2 Series 3080 Electrostatic Classifiers
Collectively, the family of Electrostatic Classifiers size-classifies
highly monodisperse, submicrometer aerosols in the range from 2
to 1000 nanometers in particle diameter. The Electrostatic
Classifier is most often used as an integral part of a monodisperse-
aerosol generation system or a submicrometer-particle sizing
system.
In an aerosol generation system, the Electrostatic Classifier
selects aerosol particles of uniform size from a polydisperse source,
resulting in a highly monodisperse aerosol. The Long DMA offers
classification in the range from 10 to 1000 nanometers in diameter.
The Nano DMA offers classification from 2 to 150 nanometers in
diameter.
In a particle sizing system, the Electrostatic Classifier separates
particles by size for high-resolution measurements of particle size
distribution. When used in TSI Scanning Mobility Particle Sizer
(SMPS) spectrometers, for example, monodisperse aerosol exiting
the Electrostatic Classifier passes to a Condensation Particle
Counter (CPC), which measures particle number concentration. By
scanning quickly through a portion of the size range from 2 to 1000
nanometers (size range varies by SMPS configuration), the SMPS
measures the size distribution of the aerosol precisely.
Some advantages of the 3080 Electrostatic Classifiers include:
Choice of two interchangeable DMAs and flexibility to use other
custom DMAs
Minimal diffusional broadening and particle loss for Nano DMA
due to its short length and bypass inlet flow design
Recirculating flow for precise match of sheath and excess flows
Accurate microprocessor-controlled volumetric flow
Precision dynamic high-voltage supply for fast, accurate
scanning
Optional easy-to-install positive high-voltage supply (negative
supply is standard)
Convenient front-panel design with control knob and built-in
display
Electronic control of flow, voltage, particle-size, gas type, and
instrument functions
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