The Brechtel Model 1205 GCVI is the ideal virtual impactor tool for probing the detailed properties of actual cloud condensation nuclei (CCN) inside real clouds. The GCVI was developed for long-term, unattended deployments at mountain and other sites with accessible clouds so researchers could explore aerosol-cloud interactions with the ease of ground operation. Significant anti-icing experience from decade-long aircraft inlet development was applied to the GCVI to ensure the automated wind tunnel lid would open and close reliably under most sampling conditions. With on-line cloud, rain and snow detection, the built-in software will automatically turn your system on when cloud is detected and off when the clouds disappear.
Peer-reviewed and characterized CVI Inlet
Droplet cut size diameters between 7 and 15 microns
15 lpm total instrument sample flow
Fully automated for long-term operation
Laminar flow element measures sample flow and automatically adjusts to changing instrument flows
Counter flow rate adjustable between 1 and 10 lpm to vary droplet cut size in real-time
Automatic power on/off with easy-to-use software
Wind tunnel lid closes automatically
Integrated rain/snow sensor
Tower mountable
Integrated anti-icing systems
Removable porous tube tip assembly
Technical Specs
PARAMETER VALUE
Droplet diameter cut size range 7-15 µm
Add flow rate range to tip 16-25 lpm
Add flow temperature range 20-45°C
Range of counterflow air flow rate 1-10 lpm
Constant air sample flow rate 15 lpm
Total air sample flow available to instruments 15 lpm
Compressor, vacuum pump and blower power (max) 2000 watts @ 230 VAC
Anti-icing power (max) 1160 watts @ 28 VDC
Other power (external laptop) 50 watts @ 115 VAC
Weather-proof enclosure size 25″W x 50″H x 34″D
Weather-proof electronics enclosure weight 220 lb/99.8 kg
Total system weight 290 lb/131.5 kg
Wind tunnel inlet height (tower mounted) 2 to 10 meters
Wind tunnel flow rate 750-1,500 lpm
Wind tunnel throat velocity range 50-100 m/sec
System footprint size 2×2 meters
Operating temperature range -20-35°C
Operating pressure range 500-1,000 mb (abs)