European Facility For Airborne Research

The particles are detected and counted by a simple optical detector after a supersaturation vapor (butanol or water) condenses onto the particles, causing them to grow into larger droplets. The CPC uses a (laser diode) light source, a condensing lense, an internal microprocessor control, volumetric flow control and a front panel display.
or Pollak counter

COndensation PArticle detection System.
Counts particles between 10 nm and 10 micrometers in diameter. Two channel condensation nuclei counter.
Residual particles, which are not evaporated after passing through the barrier are counted by the COPAS instrument mounted downstream of the CVI inlet.

Instrument provided for Transnational Access in co-operation with IPA Mainz
Contact:
Dr.Joachim Curtius
Institut for Physics of the Atmosphere
University Mainz, Germany
Phone: +49 6131 3922862