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Cloud Condensation Nuclei Counter (CCN)

The Cloud Condensation Nuclei Counter (CCN) instrument is made by Droplet Measurement Technologies.

Product Description The CCN-100/200 measures the count and size of individual aerosol particles that can form into cloud droplets. Its fast response time allows use in either airborne or ground-based stations. The CCN is available in single-column (CCN-100) or dual-column (CCN-200) versions. The CCN-100 is used for measurements of a single supersaturation, whereas the CCN-200 enables the user to measure two supersaturations simultaneously – a critical capability for droplet activation kinetics of aerosols and split sample experiments comparing the response of aerosols

Advantage Characteristics

Technical Parameter

Application Scope

Classic Cases

Advantage Characteristics

Minimize size and buoyancy effects with cylindrical geometry – giving you more accurate measurements for your critical research. Get real-time control, data display, and data logging with a user-friendly virtual instrument panel. Measure quickly changing conditions in airborne and ground-based applications with fast response, uninterrupted flow, and a multi-channel, optical particle counter.

Continuous airflow and multi-channel optical counter Get supersaturation as low as 0.07% and as high as 2%, plus complete automation of up to 250 programmable and scanned supersaturation settings. Scan 250 pre-set supersaturation values in succession

Technical Parameter

Aerosol medium Air, 5 - 40 °C (41 - 104°F)
Number concentration range Depends on supersaturation: 6,000 particles/sec at supersaturations below 0.2% 2,000 particles/sec at supersaturations above 0.3%
Measured particle size range (from OPC, after supersaturation) 0.75 µm ～ 10 µm
Supersaturation range 0.07% ～ 2.0%
Time required for supersaturation change ~30 seconds for 0.2% change
Flow range Total flow: 200 – 1000 vol. cc/min (factory calibrated at 500 Vccm) Sample flow: 20 – 100 Vccm Sheath flow: 180 – 900 Vccm
Maximum number of automatically scanned supersaturation settings 250
Optical particle counter laser 660 nm，35 mW
Number of particle size bins 20
Sampling frequency 1 Hz / 1 Second
Data system interface RS-232, 9.6 Kb/sec Baud Rate (single CCN Counter) or 57.6 Kb/sec (Dual CCN Counter)
Current CCN-100: 15 A at startup, nominal 7 A during regular operation CCN-200: 25 A at startup, nominal 20 A during regular operation
Power requirements 28 VDC
Size (for both CCN-100 and 200) For lab use (with frame): 35.0” H x 19.3” W x 15.6” D / 88.9 cm H x 48.9 cm W x 39.7 cm D For aircraft use (without frame): 32.0”H x 15.25” W x 10.6 D / 81.3 cm H x 38.7 cm W x 27 cm D
Weight CCN-100: For lab use (with frame): 35.2 kg / 77.5 lb For aircraft use (without frame): 29.0 kg / 64.0 lb CCN-200: For lab use (with frame): 50 kg / 110 lb For aircraft use (without frame): 43.8 kg / 96.5 lb
Environmental operating conditions Temperature: 5 – 40°C (41 – 104 °F) RH: 0 – 100% RH non-condensing