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Condensation Particle Counters

    Push the limits of detection to 1 nm

    1nm SMPSE77

    Introducing TSI's 1nm Scanning Mobility Particle Sizer Spectrometer ™ (SMPS™), expanding the size range to 1 nm. 

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    The Best In Condensation Particle Counting Technology Exclusively from TSI

    TSI has been manufacturing Condensation Particle Counters (CPCs) for over 30 years. We are the industry leader for particle counting instruments, and we manufacture and distribute a broad range of products for research, as well as controlled environment and occupational/indoor air quality monitoring.

    Collectively, our family of CPCs detects particles in the range from 2.5 to >3000 nm. Condensation Particle Counters use a condensation technique to enlarge submicrometer particles to a size that can be easily detected. Three of our condensation particle counting devices use water as the condensing fluid; the remaining CPCs use alcohol.

    Read more about the features and applications of our condensation particle counting instruments below.


    • Detects particles in the range from 2.5 to >3000 nm
    • Fast response to rapid changes in aerosol concentration
    • Auto recovery from power failure
    • Butanol-friendly features, including anti-spill design, water-removal system, butanol odor absorber, and improved resistance to optics flooding


    • Basic aerosol research
    • Indoor air-quality measurements
    • Filter and air-cleaner testing
    • Particle shedding and component testing
    • Atmospheric and climate studies
    • Particle formation and growth studies
    • Particle counter calibration
    • Combustion and engine-exhaust studies
    • Inhalation and exposure studies
    • Health effects studies
    • Environmental monitoring
    • Nanotechnology research
    • Mobile aerosol studies

    Contact TSI to learn more about our Condensation Particle Counters and other particle counting instruments. For a half-century, we have served countless research and industrial institutions internationally, and our team of experts is equipped to answer any questions you might have.

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