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Additional Product Info

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News on the CEN/TS 16976 compliant sampling system with integrated dilution that ensures representative sampling of the aerosol.

Condensation Particle Counter 3772-CEN



Please click here to see the successor product 3750 Condensation Particle Counter .

Product Details

Ultrafine particles (UFP) and their impact on human health and climate are currently active areas of research. UFPs can be present in large numbers due to traffic emissions, residential heating, and other processes, yet they contribute very little to the mass of atmospheric particles. In order to assess the impact of UFPs and provide guidance in future air quality regulations, it is necessary to supplement gravimetric air quality measurements - PM2.5 or PM10 - with a time-resolved measurement of particle number concentration. 

As a first step in harmonizing the measurement of UFPs in the atmosphere, the European Committee for Standardization (CEN) drafted the Technical Specification CEN/TS 16976 which defines a set of requirements for the Condensation Particle Counter (CPC) and the sampling system. 

The Model 3772-CEN CPC is fully compliant with the proposed CEN/TS 16976, which is currently under approval. It is based on the Model 3772, which has been used in atmospheric monitoring for many years with some noticeable improvements. For example, a pulse height analyzer monitors the condensation process and flags any issues. This TSI technology is also used in our engine exhaust CPCs and ensures reliable data in thousands of installed units around the world.

Your order includes the verification and calibration by the World Calibration Centre for Aerosol Physics, Leibniz Institute for Tropospheric Research (TROPOS).


Features and Benefits

  • CEN/TS 16976 compliance
  • UFP counting from 7 nm
  • Single particle counting up to 50,000 particles/cm 3
  • Advanced instrument diagnostics
  • 1 second sampling, 1 minute reporting interval
  • Easy to operate, low maintenance
  • 24/7 operation
  • CEN data record

  • Can the CPC be operated with different carrier gases?
    Yes, but only inert gases.
  • 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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