Help and Documentation

Welcome to the LI-7500A/RS Open Path CO2/H2O Gas Analyzer help and documentation.

Important: If you are processing Gill WindMaster or WindMaster Pro sonic anemometer data please read this article: Data Processing Considerations.

Top Resources

LI-7500A and LI-7500RS Open Path CO2/H2O Gas Analyzer Instruction Manual


Instruction Manual for the LI-7500RS and LI-7500A.

Logging Eddy Covariance Datasets


Quick start guide showing how to log GHG files in LI-COR eddy covariance systems.

Measuring Evapotranspiration with LI-COR Eddy Flux Systems

Application note that describes measurement of evapotranspiration with LI-COR eddy covariance systems.

Eddy Covariance Method for Scientific, Industrial, Agricultural, and Regulatory Applications

Overview of the eddy covariance method in applications besides micrometeorology, including industry, agriculture, and regulatory compliance.

View all documents...

LI-7500A and LI-7500RS Factory Recalibration

Recommended Recalibration Frequency: Every two years; however, if the internal chemicals are serviced every two years and the analyzer zero and span are verified, then no regular factory recalibration is required.

What is included with factory recalibration?

Factory Service

To request factory service or recalibration for a LI-COR instrument:

Request Factory Service

Service will be performed at our US office in Lincoln, NE USA, European office (LI-COR Biosciences - GmbH), or by a distributor. To locate your country and designated point of contact click here.

Looking for a Calibration Certificate?

Calibration information is available for light sensors, gas analyzers, photosynthesis systems, calibrated chambers, calibrated light sources, and plant canopy analyzers.

Training Courses

Eddy Covariance

Thank you for your registration.

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.