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Temperature-controlled source and detector provide stable measurements—even in wide temperature fluctuations.
Precision optical components reduce sensitivity to contamination in dusty environments.
Scratch-resistant sapphire lenses for simple cleaning in the field.
High-performance brushless chopper motor provides dependable long-term operation.
The LI-7500RS uses non-dispersive infrared spectroscopy to measure CO2 and water vapor densities in air. It transmits infrared radiation through temperature-controlled optical filters, then through the open sample path to a thermally regulated lead selenide detector. Some of the infrared radiation is absorbed by CO2 and water vapor in the sample path. Gas densities are computed from the ratio of absorbed radiation to a reference.
Included with each LI-7500RS, it houses the gas analyzer electronics, a 16 GB USB drive for data logging, and the SMARTFlux System. The LI-7550 has connections for a 3-dimensional sonic anemometer and provides Ethernet communication, making it easy to connect the LI-7500RS with FluxSuite Software.
The LI-7500RS software simplifies eddy covariance system setup, while enabling easy access to calibration and diagnostic information for the gas analyzer.
The instrument dashboard shows diagnostics for the analyzer, connection status, measurements, and real-time eddy covariance results. The intuitive interface brings all the essential eddy covariance settings together, making it easy to record site information.
Every LI-7500RS is ready to connect to FluxSuite Software. FluxSuite puts EddyPro results and instrument performance information online for access from your computer and smartphone. It enables networking and collaboration between researchers and provides email notifications when there is an issue at a site.
The LI-7500RS can be used with any high-speed 3-dimensional sonic anemometer that provides analog outputs—so you can choose the ideal anemometer for your site conditions and measurement objectives. The analyzer can be installed under or beside the sonic anemometer to minimize flow distortion and related flux errors.
LI-COR provides a variety of compatible sonic anemometers and data cables to simplify this connection.
Sensor head cables are available in five- and ten-meter options. You can install the sensor head up to ten meters from the LI-7550. The Ethernet cable can extend up to several hundred meters from the LI-7550.
The LI-7500RS supports standard network communication protocols so you can easily add networked devices, including an LI-7700 Open Path CH4 Analyzer, a LI-COR Biomet System, and a cellular or satellite radio.
Access the instrument over the Internet with a direct connection, cellular modem, or satellite communication system—and connect with FluxSuite for online access to your site and networking between sites and research groups.
Specifications subject to change without notice.