Improved Aerosol Droplet Sampler

The Improved Aerosol Droplet Sampler Model 212 is designed to collect insecticide aerosol droplets on Teflon-coated 25 by 75-mm microscope slides (for oil-based formulations) or Magnesium Oxide-coated 25 by 75-mm wide slides (for water-based formulations).

Improved Aerosol Droplet Sampler

Improved Aerosol Droplet Sampler Model 212 (shown without the supplied 12-volt gel-cell battery)


  • Accurately calibrate spraying equipment.
  • Also available in a Compact Model 312 with identical performance.
  • Use with oil-based preparations on Teflon-coated slides.
  • Use with water-based formulations on Magnesium Oxide-coated slides.
  • Comes complete with rechargeable battery and charger.

Critical to the effective use of adulticides in mosquito control is the measurement of spray volume and droplet size characterization. A recent critical, scientific, and very well-written review of ultra-low-volume space sprays for mosquito control (Bonds 2012) says this about droplet size: “Droplet size is a principal factor affecting the efficiency of space sprays for the control of adult mosquitoes as droplet size is directly related to the transport and collection efficiency. Two of the most important requirements for an optimum droplet size are that droplets must be small enough to be produced in sufficient numbers for probability of contact and large enough to impact or impinge readily on the body surface of adult mosquitoes.”

Design Characteristics of the Compact Aerosol Droplet Sampler Model 312 and the Improved Aerosol Droplet Sampler Model 212

  • Both rotate 1 by 3” microscope slides coated with either:
    • Teflon tape for oil-based sprays (PN 6.26) (multiple uses) or
    • Magnesium-oxide (PN 6.25) for water-based sprays (single use).
  • With regard to aerosol sampling for volume and size distribution characterizations, the two models have identical performance:
    • Have the same outside radius of swing of 6.3” (16 cm).
    • Both turn at a rate of 3.6 m/sec.
  • Considered the industry standard for sampling insecticide aerosols for agriculture and public health (Bonds et al. 2009).
  • Both models are the recommended samplers for measuring the sprays from “conventional spray systems” sprays with DV0.5‘s in excess of 50 μm (Barber et al.  2004).
    • Both models have had their performance well characterized for sampling public-health aerosols; see the following PDF’s:
      • A Field Measurement Device for the Aerosols Used in Mosquito Control (Barber et al. 2004)
      • Volumetric Collection Efficiency and Droplet Sizing Accuracy of Rotary Impactors (Fritz et al. 2011)
      • Aerosol Sampling: Comparison of Two Rotating Impactors for Field Droplet Sizing and Volumetric Measurements (Bonds et al. 2009)

Included Items

The Improved Aerosol Droplet Sampler Model 212 includes:

  • A removable and rechargeable gel-cell battery supplying 12 volts and 2.5 amp-hr capacity.
  • On/off switch.
  • Provides ca. 18 hours of continuous operation between charges.
  • Comes supplied with battery charger (input 120 VAC, 60 Hz, rated at 500 mAmps/hr).
  • American-made precision gear motor (12 VDC/130 mAmps/hr).


  • Requires 25 by 75-mm microscope slides (purchased separately, see options below)


P/N Description
6.25 Magnesium Oxide-coated.  Slides not reusable.  Slides measure 1 by 3” (25 by 75-mm), 1.0-mm thick.  For use with either the Model 312 or the 212.  Box of 24 slides.
6.26 Teflon-coated.  Slides can be cleaned with alcohol.  For use with either the Model 312 or the 212.  Slides measure 1 by 3” (25 by 75-mm), 1.0-mm thick.  Box of 24 slides.