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Thank you for your request.

You will receive an email shortly.

If you do not receive it within 24 hours or if you have any questions, please contact LI-COR at 1-402-467-3576.

Why Choose LI-COR Eddy Covariance Systems?

LI-COR eddy covariance (EC) systems are designed and supported by a staff of experienced scientists and engineers— more eddy covariance experts than any other company. We do what it takes to deliver scientific accuracy and the best service and support, without compromise or shortcuts. The results speak for themselves.

Preferred by
Major Networks

Based on independent testing and trials, most flux networks around the world have chosen LI-COR gas analyzers and software for standardization across their networks.

  • AmeriFlux
    170 active EC systems in the Americas. Over 90% include LI-COR Analyzers.
  • AsiaFlux
    104 EC systems. An estimated 80-90% include LI-COR Analyzers.
  • ChinaFlux
    Approximately 72 active EC systems. An estimated 80-90% include LI-COR Analyzers.
  • Cold and Arid Regions Network (CARN)
    19 EC systems across western China. 100% include LI-COR Analyzers.
  • Chinese Ecosystem Research Network (CERN)
    More than 25 EC systems measuring evapotranspiration in China. 100% include LI-COR analyzers.
  • Integrated Carbon Observation System (ICOS)
    65-70 EC systems throughout Europe. 100% include LI-COR analyzers.
  • National Ecological Observatory Network (NEON)
    80 systems planned throughout the United States. 100% will include LI-COR Analyzers.

See publications that use LI-COR eddy covariance analyzers.

Get the Publications List

Fully Processed Fluxes
At Your Site

No other EC system comes close to providing as many automated processing steps. These steps—based on published research in refereed journals—avoid potential errors in flux calculations. LI-COR’s popular EddyPro Software runs automatically in the SmartFlux System, offering raw data QA/QC, spectra and cospectra, flux footprint, data output in database-compliant formats (FLUXNET, ICOS, and Ameriflux), and raw data upload to servers. Most alternative EC software packages offer none of these features.

Careful Design for
Dependable Results

LI-COR’s EC systems use a separate gas analyzer and sonic anemometer for important reasons: maximum setup flexibility, minimal flow distortion, and the most accurate fluxes possible. With combined instruments, the gas analyzer head can distort the turbulent flow before it is measured by the anemometer.

Avoids Flow Distortion

An object inside the flow path of a sonic anemometer— whether it is a tree branch, a tower support structure, or a gas analyzer— will cause some airflow distortion in the anemometer, potentially leading to inaccurate 3D wind speed measurements. Airflow distortion cannot be easily observed in the data, and most importantly, it cannot be corrected in flux computations. The simplest way to address this problem is to maintain appropriate separation between the gas analyzer and the anemometer. This is ideal because the effects of sensor separation are routinely corrected and verified in EddyPro Software.

Object near the anemometer


Figure 1. Objects that are too close to the sonic anemometer can cause flow distortion and lead to measurement errors.

Measures Wind from All Directions

With a LI-COR EC system, you can place the gas analyzer at the ideal distance from an omnidirectional sonic anemometer in the least frequent wind direction and get good measurements from nearly all directions with minimal airflow distortion.

Frequency of Wind


Analyzer Placement

Figure 2. Wind rose from a site with highly variable wind directions.

Figure 3. Overhead views of an integrated gas analyzer and c-clamp style sonic anemometer (left) and a system with an omnidirectional sonic anemometer and LI-7500DS (right). Horizontally symmetrical, c-clamp style anemometers work very well for sites where there is a predominant wind direction. However, they can cause obstructions when wind is from the backside, which may lead to unreliable flux measurements from up to 50% of directions. This problem can be exacerbated when the gas analyzer is inside the sonic anemometer. Systems that use a separate gas analyzer and sonic anemometer typically have fewer disruptions to air flow and are especially well suited for sites that have highly variable wind directions.

Easily Add
Methane Measurements

Only LI-COR EC systems make it easy to add methane measurements. Connect the LI-7700 Open Path CH4 Analyzer with a single Ethernet cable and get fully processed methane fluxes in real time, while adding as few as 8 watts to the power demands of the system.

Ensure Your Success with
Training and Support

Current and prospective eddy covariance customers are invited to attend a hands-on, 3-day training course taught by our expert eddy covariance scientists and support staff. We are also available to answer questions and troubleshoot any issues that come up.

Get more details about the advantages unique to LI-COR eddy covariance systems and CO2/H2O analyzers.

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