The Eddy Covariance (EC) system provides high-precision, long-term measurement of exchanges between the atmosphere and biosphere, including CO₂, water vapor, heat, and momentum. A complete setup includes the EC155 closed-path gas analyzer, CSAT3A 3D sonic anemometer, CR6 datalogger, sample pump, and CDM-A116 for sensor expansion. Its compact 5.9 mL sample cell and optimized intake design deliver excellent frequency response (4.3 Hz cutoff) with only 12 W total power consumption, making it ideal for remote and low-power sites.
The GasFlux CRBasic program enables fully corrected CO₂, H₂O, sensible heat, and momentum flux calculations directly on the datalogger using high-frequency raw data and established scientific correction methods. Tested across diverse environments—such as agricultural fields, open water, forests, and deserts—the system delivers results comparable to traditional PC-based flux processing software.
- New conformal coating protects sonic transducers in harsh or corrosive environments
- CR6 datalogger offers powerful, expandable processing for mid-level EC systems
- Ideal for sites with multiple sensors and towers of varying heights
- Streamlined system architecture simplifies integration and troubleshooting
- High-quality EC measurements using the EC155 Closed-Path Gas Analyzer and CSAT3A sonic anemometer
Specifications
| Operating temperature Range | -30° to +50°C |
| Input voltage range | 10.5 to 16.0 Vdc |
| Power |
35 W (maximum, at cold startup) 12 W (typical) |
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System enclosure |
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| Dimensions | 54 x 44.5 x 29.7 cm (21.3 x 17.5 x11.7 in.) |
| Weight |
14.6 kg (32.2 lb.) with optional CDM-A116 module 13.72 kg (30.25 lb.) |
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Pump module |
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| Inlet connector | 3/8-in. Swagelok |
| Pressure sensor range | 15 to 115 kPa |
| Pumping speed |
3 to 9 LPM (automatically controlled at the set point, typically, 7 LPM) |