Instrument : Condensation Particle Counter (CPC)

Instrument Categories

A Condensation Particle Counter measures sub-micron aerosol particle number concentration by growing the particles to a size that is easily detectable and countable by optical scattering. The condensating liquid is typically an alcohol (e.g., butanol) or water. Depending on the CPC model, the commercial CPC instruments can cover a size range from 3 nm to 3000 nm (ultrafine) or 10 nm to 3000 nm (fine).

The CPC is part of the Aerosol Observing System (AOS).

Output Datastreams

  • aoscpc : AOS: condensation particle counter
  • aoscpcf : AOS: Condensation Particle Counter
  • aoscpcu : AOS: Ultrafine Condensation Particle Counter

Primary Measurements

The following measurements are those considered scientifically relevant.


Eastern North Atlantic
ENAC1 Browse DataGraciosa Island, Azores, Portugal
North Slope Alaska
NSAX1 Browse DataExternal Data (satellites and others)
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK
ARM Mobile Facility
MAGM1 Browse Data Browse PlotsLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit
MAOM1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; AMF1
PGHM1 Browse DataARIES Observatory, Nainital, Uttarkhand, India
PVCM1 Browse Data Browse PlotsHighland Center, Cape Cod MA; AMF 1
TMPS1 Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AOS

See Also


Stephen Springston
(631) 344-4477

Anne Jefferson
(303) 497-6493

Chongai Kuang
(631) 344-7257

Annette Koontz
(509) 375-3609

Cynthia Salwen