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 Data Browse PlotsGraciosa Island, Azores, Portugal
North Slope Alaska
NSAX1 Browse DataExternal Data (satellites and others)
Southern Great Plains
SGPC1 Browse DataCentral Facility, Lamont, OK
SGPS01 Browse DataSupplemental 1, Lamont, OK
ARM Mobile Facility
ACXM1 Browse Data Browse PlotsOff the Coast of California - NOAA Ship Ronald H. Brown; AMF2
ASIM1 Browse DataAscension Island, South Atlantic Ocean; AMF1
AWRM1 Browse Data Browse PlotsMcMurdo Station Ross Ice Shelf, Antarctica; AMF2
MAGM1 Browse DataLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit; AMF2
MAOM1 Browse DataManacapuru, Amazonas, Brazil; AMF1
OLIM1 Browse DataOlikiok Point, Alaska; AMF3
PGHM1 Browse Data Browse PlotsARIES Observatory, Nainital, Uttarkhand, India; AMF1 retired
PVCM1 Browse Data Browse PlotsHighland Center, Cape Cod MA; AMF1 retired
TMPS1 Browse Data Browse PlotsU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AOS
 retired = Originating instrument has been retired at this location

See Also


Cynthia Salwen
Brookhaven National Laboratory

Robert Bullard
Brookhaven National Laboratory

Annette Koontz
Pacific Northwest National Laboratory
(509) 375-3609

Stephen Springston
Brookhaven National Laboratory
(631) 344-4477

Anne Jefferson
(303) 497-6493

Chongai Kuang
Brookhaven National Laboratory
(631) 344-7257