Flux measurements

Los Gatos Research (LGR) now offers more analyzer choices to measure surface-atmosphere fluxes. Traditionally, there are four main flux measurement techniques: Eddy Covariance, Relaxed Eddy Accumulation, Gradient and Chamber-based. Though carbon dioxide and water vapor are the most common greenhouse gases measured, in many ecosystems a number of different gases must be measured. LGR's technology has improved rapidly over the years and new analyzers are now available allowing scientists to expand their research by measuring other greenhouse gases such as methane, nitrous oxide, carbon monoxide, ammonia, and carbonyl sulfide.

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More Choices at Great Prices

Now LGR offers an expanded line of high speed (10 Hz) and lower speed (up to 1 Hz) gas analyzers that can be used for all four techniques to measure a wide variety of gases.

Two important accessories are also available:

Multi-Channel Data Logging Software: Synchronizes serial (RS-232) outputs from multiple LGR analyzers and other devices, such as GPS or sonic anemometers, and records all data with a common time stamp.

Multiport Inlet Unit (MIU): Available with either 8 or 16 inlets and 1 output port which is used to connect to the Analyzer. The MIU inputs are fully controlled by software on the LGR Gas Analyzer so that any port may be selected at any time. Once programmed, the sequence of measurements is fully automated.

Here is a list of the LGR analyzers that can be used for each flux measurement technique:

Eddy Covariance Technique »

For New Eddy Covariance Sites: Choose the high speed, high precision LGR analyzer(s) listed below based on which gases you want to measure. You can connect the analyzer(s) to a datalogger or use the LGR multi-channel data logging system to connect a sonic anemometer available from various manufacturers such as Campbell Scientific, Gill, Applied Technologies (ATI), Metek, RM Young, or Kaijo-Denki.

For Existing Eddy Covariance Sites: Expand your system by adding any of these high speed, high precision LGR analyzers. You can connect the analyzer(s) to your existing datalogger.

Greenhouse Gas Analyzer to 10 Hz: The world's most advanced analyzer for simultaneous measurements of CH₄, CO₂ and H₂O.
Fast Methane Analyzer to 20 Hz: For simultaneous measurements of CH₄ and H₂O with unsurpassed precision, accuracy and dynamic range.
OCS Analyzer to 10 Hz: For simultaneous measurements of COS (Carbonyl Sulfide), CO₂, CO and H₂O with extraordinary precision and sensitivity.
Carbon Dioxide Analyzer to 10 Hz: For simultaneous measurements of CO₂ and H₂O with unsurpassed precision, accuracy and dynamic range.
CO/CO₂ Analyzer to 10 Hz: For extremely high precision and simultaneous measurements of CO, CO₂ and H₂O.
Carbon Monoxide Analyzer to 10 Hz: For simultaneous measurements of CO and H₂O with unsurpassed precision, accuracy and dynamic range.
N₂O/CO Analyzer to 10 Hz: For simultaneous measurements of N₂O, CO and H₂O with unsurpassed precision, accuracy and dynamic range.
Trace Ammonia Analyzer to 10 Hz: Measurements of NH₃ with unsurpassed precision, accuracy and dynamic range.

In addition to the high speed, high precision analyzers, LGR offers the most complete line of isotope analyzers:

Carbon Dioxide Isotope Analyzer (CO₂, δ¹³C, δ¹⁷O, δ¹⁸O): Model CCIA-46 (Enhanced Performance) provides measurements of δ¹³C, δ¹⁷O and δ¹⁸O, as well as mole fraction of carbon dioxide, with extraordinary precision at measurement rates of up to 5 Hz.
Carbon Dioxide Isotope Analyzer (CO₂, δ¹³C, δ¹⁸O): Model CCIA-36 (Enhanced Performance) provides measurements of δ¹³C and δ¹⁸O as well as mole fractions of carbon dioxide and water vapor with high precision at measurement rates of up to 1 Hz.
Carbon Dioxide Isotope Analyzer - Elevated CO₂: It provides many features that researchers need when measuring isotopic carbon dioxide from samples containing high levels of CO₂ including ultra-low drift and high precision, ability to measure CO₂ as well as δ¹³C and δ¹⁸O in CO₂ from 2% to 100% CO₂ and fast response.
Methane Carbon Isotope Analyzer (CH₄, δ¹³C): It provides sub ppm precision of δ¹³C in CH₄ with a rapid response time. Because it does not require user intervention, this instrument also enables long-term methane isotope monitoring studies.
Isotopic N₂O Analyzer (N₂O, δ¹⁵N, δ¹⁸O): The world's first commercially available laser-based gas analyzer that measures isotopic site-specific (15N) nitrogen in N2O.
Water-Vapor Isotope Analyzer (H₂O, δ²H, δ¹⁷O, δ¹⁸O): Now you can accurately measure δ¹⁷O, δ¹⁸O and δ²H in ambient water vapor (to over 60,000 ppm) rapidly with high precision in a measurement time of less than 0.5 seconds.

Relaxed Eddy Accumulation (REA) Technique »

Ultraportable Greenhouse Gas Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄, CO₂ and H₂O.
Ultraportable Methane Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄ and H₂O.
Ultraportable Methane/Acetylene Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄, C₂H₂ and H₂O.
Ultraportable Ammonia Analyzer at 0.01-1 Hz: For simultaneous measurements of NH₃ and H₂O.
Economical Ammonia Analyzer at 0.01-1 Hz: For simultaneous measurements of NH₃ and H₂O.
NO₂ Analyzer at 0.01-1 Hz: Measurements of NO₂ from the 2012 R&D Magazine award winning analyzer.
Multiport Inlet Unit: Available with either 8 or 16 solenoid valve input ports that can be controlled by any LGR gas analyzer. The ports are programmed at the analyzer which allows for any port to be selected for input at any time. Once programmed the measurements of the different samples or reference gas cylinders are fully automated.

Gradient Flux Technique »

Ultraportable Greenhouse Gas Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄, CO₂ and H₂O.
Ultraportable Methane Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄ and H₂O.
Ultraportable Methane/Acetylene Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄, C₂H₂ and H₂O.
Ultraportable Ammonia Analyzer at 0.01-1 Hz: For Simultaneous measurements of NH₃ and H₂O.
Economical Ammonia Analyzer at 0.01-1 Hz: For simultaneous measurements of NH₃ and H₂O.
NO₂ Analyzer at 0.01-1 Hz: Measurements of NO₂ from the 2012 R&D Magazine award winning analyzer.
Multiport Inlet Unit: Available with either 8 or 16 solenoid valve input ports that can be controlled by any LGR gas analyzer. The ports are programmed at the analyzer which allows for any port to be selected for input at any time. Once programmed the measurements of the different samples or reference gas cylinders are fully automated.

Chamber-Based Technique »

Use your custom made chambers, other commercially available chambers or other accessories to connect to any of the analyzers below or use the LGR Multiport Inlet Unit (see below) to connect multiple chambers.

Ultraportable Greenhouse Gas Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄, CO₂ and H₂O.
Ultraportable Methane Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄ and H₂O.
Ultraportable Methane/Acetylene Analyzer at 0.01-1 Hz: For simultaneous measurements of CH₄, C₂H₂ and H₂O.
Ultraportable Ammonia Analyzer at 0.01-1 Hz: For Simultaneous measurements of NH₃ and H₂O.
Economical Ammonia Analyzer at 0.01-1 Hz: For simultaneous measurements of NH₃ and H₂O.
NO₂ Analyzer at 0.01-1 Hz: Measurements of NO₂ from the 2012 R&D Magazine award winning analyzer.
Multiport Inlet Unit: Available with either 8 or 16 solenoid valve input ports that can be controlled by any LGR gas analyzer. The ports are programmed at the analyzer which allows for any port to be selected for input at any time. Once programmed the measurements of the different samples or reference gas cylinders are fully automated.