skip to content

Small-Scale Powder Disperser 3433

Request A Quote Related Products

The Small-Scale Powder Disperser (SSPD) Model 3433 is the preferred choice for dispersing small amounts of powder. It is often used in studies that involve rare, expensive, or hazardous materials. It also effectively disperses polystyrene latex (PSL) spheres, used to calibrate measurement instruments. Use the SSPD with our Aerodynamic Particle Sizer® (APS™) Spectrometer for particle-size-distribution measurements of dry powders.

Product Details

The SSPD* Model 3433 produces small quantities of powder by lifting particles from a turntable using a venturi aspirator. The turntable rotates at variable speeds to control aerosol concentrations. Shear forces created in the SSPD are sufficient to de-agglomerate most dry particles in the range from 0.5 to 50 µm.

A selection of optional turntables is available to meet special needs.

Features and Benefits

  • Deagglomerates most dry particles in the range from 0.5 to 50 µm
  • Selection of turntables available to meet specific dispersion needs
  • Use as an APS accessory for particle-size-distribution measurements


  • Aerosol generation
  • Powder dispersion

*Developed in cooperation with the University of Minnesota Particle Technology Laboratory.

  • Are the particles coming out of the SSPD charged?
    Yes. Turbulence in the venturi builds up charges on the particles. The direct straight-line transport to the APS minimizes transport loss however.
  • How do you get aerosol from the outlet on top of the SSPD to the inlet on top of the APS™ spectrometer?
    The APS™ spectrometer can be inverted and set upside down on top of the SSPD. It is recommended that you use a foam pad of about 4 cm thick to raise the APS up so that it will be level. The APS runs perfectly fine upside down. Alternatively a conductive tube can be used to transmit particles from the outlet of the SSPD into the inlet the APS. Some losses of larger particles may occur due to settling and impaction in the bend of a tube.
  • Why can't you use the SSPD for very fine powders smaller than 1 µm?
    Powders that are smaller than 1 µm will not deagglomerate efficiently in the SSPD.

If you are seeing this, then the pnlEUCookieScripts is working