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Nano Water-based Condensation Particle Counter 3788

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Product Details

TSI's N-WCPC Model 3788 is designed for investigators interested in detecting the smallest nanoparticles. This sophisticated particle counter uses state-of-the-art, water-based condensation technology and features the highest activation energy and lowest detectable particle size of the WCPC family. With less than 0.1 second rise time, the Model 3788 is the fastest CPC commercially available and its high sample flow rate provides low diffusion losses and low Poisson noise. Other important elements include a thermodynamically optimized growth region and enhanced optical and detection design for impressive signal-to-noise ratios. The Model 3788 can be used as a stand-alone counter measuring up to 400,000 particles/cm 3 (using single particle counting) or as a component of a TSI SMPS spectrometer .


Features and Benefits

  • 2.5 nanometer detection 
  • Single particle counting to 4 x 10 5 particles/cm
  • < 100 millisecond rise time response 
  • Sheath flow with high aerosol flow rate for enhanced counting statistics 
  • Convenient, eco-friendly water as working fluid
  • 1⁄10 th second data reporting 
  • Built-in SMPS™ spectrometer compatibility
  • USB flash drive data storage option
  • Built in Ethernet capability
  • 6" color touch screen with graphical interface 


TSI's N-WCPC is suitable for most particle counting applications, but its ability to detect down to 2.5 nanometers, make this WCPC ideally suited for:

  • Particle formation and growth studies
  • Nanotechnology research or process monitoring
  • Inhalation or exposure chamber studies
  • Combustion and engine exhaust studies

Learn how to purchase a N-WCPC Model 3788 for less!

  • Can the CPC be operated with different carrier gases?
    Yes, but only inert gases.
  • How does the water CPC performance compare to CPCs that use butanol?
    Laboratory and field tests show excellent agreement and correlation between the water CPC (Model 3785) and butanol CPCs (Models 3010, 3025A and 3022A) for particles larger than about 20–30 nm. Preliminary test results can be viewed in a poster presentation by S. Hering, M. Stolzenburg, F. Quant and D. Oberreit (2003 AAAR Annual Conference, Anaheim, CA) at Additional test data will soon be submitted for publication.
  • How frequently should I have the CPC serviced?
    We recommend the CPC be returned for annual maintenance service. Your company’s Quality Management System may specify a more or less frequent service interval based on history, use and criticality of the measurement. The Standard Annual Service includes:Perform an ‘AS FOUND’ operational and calibration check.Replace tubing, o-rings and water wick.Clean optics, flow path and all wetted parts.Update firmware/software.Perform operational check.Calibrate flows.Calibrate photometric mode using sodium chloride aerosol.
  • How pure does the water need to be?
    We recommend using water that is distilled or purer. 
  • How sensitive is the instrument to flooding?
    While fairly insensitive to flooding, several precautionary measures will help avoid this condition. Do not tip the instrument more than 10 degrees in any direction. Avoid large pressure fluctuations or restrictions in flow at the sample inlet (>25 cm water at 1.0 liter/minute). When accessing the reservoir for cleaning or drying, always lay the instrument on its side with the Fill and Drain connectors on the bottom. 
  • Is the counting efficiency for each CPC determined individually?
    No. The CPC efficiency curve has been determined by testing a statistically valid number of CPCs and averaging the results to obtain the curve published in the product literature. Variation between units is very small. 
  • What is the final droplet size after growth by condensation?
    This question has been investigated, theoretically, by Ahn and Liu (1990). For the initial particle diameters of 5 and 20 nm, the computation results show a final droplet size of 11.3 and 12.3 micrometers, respectively (Ahn and Liu, 1990). Similar experimental results have also been determined.

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