European Facility For Airborne Research

European Facility For Airborne Research Oct. 3, 2023, 06:19

Instrument: M55 Mainz COPAS

Name M55 Mainz COPAS
Acronym COPAS-M55
Manufacturer University of Mainz
Operated by Geophysica-GEIE
Operated onboard

Instrument type

Name Condensation Particle Counter (CPC)
Acronym Condensation Particle Counter

Principle of operation

Measured parameter Number concentration of submicrometer aerosol particles
Operating principle

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

Measurement(s) Clouds & Precipitation

Dimension and weight

External dimension
Weight 25.6


Operating mode In situ






Operational restriction

Operational requirements

Certification approvals

Additional information

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.

Access, host and processing


Contact Volker Dreiling
Tel: 49-6131-39 4374
Fax: 49-6131-39 3532
University of Mainz
Institut fur Physik der Atmosphïare
Becherweg 21
D-55099 Mainz, Germany

Could also fit on any aircraft having the following characteristics

General description

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