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Specializing in the measurement of airborne particles

Founded in 1991, we are a small R&D company specializing in the measurement of airborne particles. These particles comprise the visual haze in the atmosphere, and are important to human health and global climate. Aerosol instruments developed by our firm are used for atmospheric research, routine monitoring, epidemiology studies and global climate research.


Commercial Instruments Based On Our Firm’s Technology



Our water-based condensation particle counters measure the number concentration of airborne particles as small as a few nanometers in diameter.  First introduced in 2005, WCPCs for laboratory and micro-contamination are licensed to, and sold by TSI Inc.



MAGIC is compact, motion-tolerant, battery operable water-based condensation particle counter.  MAGIC is sold through Aerosol Devices Inc.


SPOT Sampler

The Spot Sampler captures fine and ultrafine particles in a concentrated manner for easy, off-line analysis.  Its moderated condensational technology enlarges particles without temperature extremes, making it ideal for volatile or biological applications.  The Spot Sampler is sold through Aerosol Devices Inc.



Our thermal desorption aerosol gas chromatograph provides hourly, in-situ molecular speciation and quantitation of semi-volatile organic aerosols.  Developed jointly with the University of California, Berkeley, this instrument is sold through Aerodyne Research, Inc.


Some Of Our Latest Technology Developments


“versatile WCPC” uses our latest, water-based condensation technology to provide particle detection near 1 nm.


“Aerosol Mobility Imaging” is developed jointly with Brookhaven National Laboratory, provides rapid – 1 Hz –  mobility-based particle sizing from 10nm to 500 nm.


This version of the Spot Sampler is adapted for biological collection, and is exceptionally efficient for airborne viruses capture, as demonstrated by our colleagues at the University of Florida.  Prototype VIVAS units are sold through Aerosol Devices Inc. 


“Comprehensive TAG”, developed with UC Berkeley, extends the thermal desorption aerosol gas chromatograph to include volatile organic compounds (VOCs) in addition to semi-volatile vapors and particles, spanning C5 to C30 compounds.