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Get the Right Data
Our leading eddy covariance scientists and engineers work together to solve the most challenging aspects of eddy covariance measurements. The outcome of this collaboration is simple-to-use, highly versatile flux systems that provide dependable results. When designing eddy covariance systems, we do not compromise on quality or take shortcuts.
Withstands 161 km/hr (100 mph) wind gusts with a full load of instruments. Validated by structural engineers.
Each LI-7500RS and LI-7200RS CO2/H2O analyzer includes the SmartFlux 2 System. Simply add a sonic anemometer and you’ll have a complete eddy covariance system. For an advanced system, you can easily add an LI-7700 Open Path CH4 Analyzer for measuring methane fluxes, and a biomet system for additional biological and meteorological measurements.
With low power requirements, the LI-7500RS is ideal for water vapor flux (evapotranspiration) and CO2 flux measurements. It is recommended for sites that are dusty or have infrequent rain, snow, or fog events.
The LI-7200RS is ideal for environments that have frequent rain, fog or snow, and very low CO2 flux rates. It is available with a thermally insulated intake tube for typical environments, or a heated intake tube that is recommended for humid environments. Using a patented system, the LI-7200RS computes CO2 and H2O dry mole fractions, which simplifies flux calculations and reduces errors in final fluxes.
The LI-7700 easily integrates with LI-COR eddy covariance systems. The open path design ensures extremely low power consumption and avoids problems caused by pumps, tubing sorption, and tubing delays. It is easy to add the LI-7700 to LI-COR eddy covariance systems, log methane data with the eddy covariance dataset, and compute final methane flux results in real time with the SmartFlux 2 System.
LI-COR eddy covariance systems are compatible with almost any sonic anemometer brand and model. Quick-connect cables provide simple, robust connections for common sonic anemometer models. Raw data from the sonic anemometer, gas analyzers, and the biomet system are logged in eddy covariance data files for seamless processing by SmartFlux 2 and EddyPro.
Four Gill anemometer models are available. Each Gill anemometer sold through LI-COR includes individual wind tunnel calibration, a carrying case, mounting hardware, and data cables, and provides digital anemometer data and diagnostics to the dataset.
LI-COR offers digital data and power supply cables for the CSAT3 and CSAT3B sonic anemometers, making it easy to log digital anemometer data and diagnostics in the dataset.
Additional Sonic Anemometers Supported
RM Young, Metek, Kaijo-Denki, and other models with analog outputs are also compatible with LI-COR eddy covariance systems.
Anemometer Data and Power Cables
Sonic anemometer data and power cables provide a direct connection for a Gill WindMaster™, WindMaster™ Pro, R3-50™, HS-50™, or Campbell® Scientific CSAT3, or CSAT3B sonic anemometer to the eddy covariance system.
Cable Part Number
Gill WindMaster™ or WindMaster™ Pro
Biomet System and Sensors
LI‑COR eddy covariance systems support a full complement of additional biomet sensors. Data from these sensors are time synchronized with gas analyzer and sonic anemometer data and logged in eddy covariance data files, so they can be used for gap filling and interpreting flux results. They are summarized with EddyPro® Software output and also can be evaluated independently of the eddy covariance data set.
The biomet system includes a datalogger and a pre-configured enclosure with mounting hardware. Installed components include circuit breakers, relay switches, terminal blocks, and grounding connections. It has an Ethernet connection for data transfer and collection on the LI‑7550. Space is also available for the addition of network switches and/or cell modem communication devices.
A 12V backup battery system enables the biomet system to continue operating for 2 to 3 days if the primary power supply fails. This ensures that you have biomet records even if there are gaps in other measurements. The Biomet Backup Battery System is an optional add-on to new systems and is available as a retrofit kit for existing systems.
Continue logging biomet data for gap filling flux measurements
Powers biomet system for 2 to 3 days without main power
Automatically disables high-draw sensors, extending the life of the backup battery
Recharges the backup battery when main power is on and switches to the backup battery if the main power fails
The biomet system is available with a choice of four sensor packages to meet the needs of typical eddy covariance setups. To simplify setup and eliminate programming, the biomet system is provided with pre-written programs for each of the sensor packages available. Alternatively, the biomet system can be customized to record measurements from almost any sensor at your research site - and from a nearly unlimited number of sensors.
Why purchase biomet packages from LI‑COR?
Pre-written programs simplify setup and eliminate the need for programming.
Humidity and Temperature Probe (Vaisala HMP155) and Radiation Shield (RM Young)
Basic biomet sensors with 4-component net radiation measurements
Basic biomet sensors with self-calibrating soil heat flux sensors
Advanced biomet sensors with 4-component net radiation and self-calibrating soil heat flux sensors
Each sensor package includes the required number of expansion modules. Additional expansion modules are available if you want to add sensors to your site.
For research that requires biomet sensors other than those described above, any of the programs can be customized to suit your needs, or you can create custom programs to support whichever sensors you need at your research site.
Radiation and Light Measurements
Single-Channel Net Radiometer Kipp & Zonen® NR Lite2 – The NR Lite2 is a simple, low cost sensor that measures net radiation.
Four-Channel Net Radiometer Kipp & Zonen® CNR4 – This net radiometer measures incoming and reflected radiation, in both short and long wavebands.
Range: calibration dependant; up to 0-100% VWC with polynomial equation
Dimensions: 8.9 x 1.8 x 0.7 cm
Cable Length: 5 m, custom cable lengths available upon request
Measurement Time: 10 ms
Power: 2.5 - 3.6 V DC @ 10 mA. Output proportional to input voltage. 2.5 V and 3 V excitations supported with calibration equations
Output: Voltage, correlated linearly (soil) or polynomially (growing media) with VWC
Temperature: -40°C to +50°C
Connector Types: 3.5 mm "stereo" plug or stripped and tinned lead wires (3)
Datalogger Compatibility (not exclusive):Decagon: Em50 series loggers, ProCheck, ECH2O Check, Em5b Campbell Scientific: CR10X, 21X, 23X, CR1000, CR3000, etc. Other: Any data acquisition system capable of switched 2.5 to 3.6 V excitation and single ended voltage measurement at 12 bit or better resolution.
Warranty: One year, parts and labor
Soil Temperature Sensor LI‑COR® 7900-180 – Soil temperature sensor for long-term measurements of soil temperature.
The cellular communication modules use a rugged Sierra Wireless™ AirLink® LS300 or Hongdian H7921 wireless gateway to put your eddy covariance system online. When your system is online, you can transfer raw data from your site automatically or whenever desired, and configure the instruments from your office or home computer.
Cellular radios use a machine-to-machine data plan provided by the cellular carrier of your choice. Simply arrange a service agreement with your cellular provider, configure the system, and connect with your flux station from your computer. Cellular radios are available for both GSM and CDMA standards used by major cellular carriers around the world.
Cellular communication provides lower-cost data plans and larger data transfer volumes than satellite communication. Cellular is recommended if coverage is available at your site.
Cellular for a Basic EC System
Select this option if you do not have a Biomet System with your eddy covariance station. It includes an enclosure, cellular modem, high-gain antenna, power cables, data cables, and hardware.
Cellular for an EC System with Biomet
Select this option if you have a Biomet System with your eddy covariance station. It includes a cellular modem, high-gain antenna, Ethernet switch, power cables, data cables, and hardware to mount the module inside a Biomet System enclosure.
Select this option if your site is not in range of a cellular network. The satellite system includes a Hughes 9502 Fixed Satellite Terminal, antenna, antenna cable, antenna mounting post, power and data cables, enclosure, mounting hardware, and instructions to configure your gas analyzer and communication system.
Designed to provide 4 dark-days of operation with LI‑COR eddy covariance systems
High wattage output to provide continuous power and prevent data loss
24-volt systems that provide power with greater efficiency than 12-volt systems
UL and CE certified, demonstrating safety and performance compliance
Systems are available in 25, 40, 50, and 65 watt configurations for locations with 1.5 or more sun hours. Contact a sales representative to determine which system is best for your instrument setup and location.
Each system includes a solar panel array, lead‑acid batteries, a vented enclosure, charge controller, solar panel power cables, assembly hardware, instruction manual, and a power distribution box.
Power Distribution Systems
The 7900‑231 Regulated Power Distribution Box is ideal for a 24‑volt solar power supply. It connects directly to the power supply and provides six unregulated outputs with power output equal to power supplied and two regulated 12‑volt outputs.
The 7900‑230 Power Distribution Box is ideal for a 12‑volt power supply. It provides 11 connections for powered sensors, with the power output equal to the power supplied.
A 20‑meter cable in aluminum conduit carries power from the solar power supply to the box. It is suitable for ground contact. A 40‑meter extension cable without conduit, and thus, not suitable for ground contact, is used for tower installations.
Power distribution boxes and cables are available separately or in combination with LI‑COR solar power systems.
Tripod for Eddy Covariance Stations
The 7900-300 Heavy Duty Adjustable Tripod is a sturdy instrument platform for eddy covariance systems, communication antennas, meteorological sensors, and enclosures.
The tripod provides mounting heights up to 4 m (13 ft) with individually adjustable legs for deployment on uneven terrain. It is constructed from anodized aluminum with stainless steel hardware for durability and weather resistance. Each tripod includes a cross arm, guy cable kit, earth anchors, lightning rod, grounding hardware, foot stakes, and UV-resistant cable ties. It is validated to withstand 161 km/h (100 mph) wind gusts when fully loaded.
Additional cross arms and hardware components are available to mount gas analyzers, radiation sensors, and other sensors to the tripod.
Load capacity: 135 kg (297 lbs)
Base diameter with legs extended: 2.54 m (8 ft 4 inches)
Base diameter with guy cables: 8 m (26 ft 3 inches)