LI-COR LI-7810 Trace Gas Analyzers for CH4/CO2/H2O

Trace Gas Analyzers

LI-7810

When methane matters most

The LI-COR LI-7810 CH₄/CO₂/H₂O Trace Gas Analyzer provides exceptionally stable and precise methane measurements in a design that is both surprisingly portable and affordable. CH₄ measurements drift less than 1 ppb per 24-hour period with 0.25 ppb precision (1σ, with 5-second averaging) at 2000 ppb CH₄ in dry air at STP.

Achieve the long-term stability and precision needed for atmospheric monitoring, with the flexibility of design for deployments in mobile monitoring or soil flux research.

Exceptionally stable and precise measurements

When methane matters the most, the LI-7810 provides CH₄ measurements with high precision and stability and good CO₂ and water vapor measurements.

LI-7810 Long-Term Outdoor CH₄ Stability

Figure 1. Thirty-day methane stability data from an LI-7810 CH₄/CO₂/H₂O analyzer deployed in an enclosed shelter at an outdoor monitoring site in Lincoln, Nebraska. The instrument was operated continuously over the entire time period. The analyzer measured ambient air between stability checks. During stability checks, the analyzer was flushed for 10 minutes with tank gas (2 ppm CH₄, 400 ppm CO₂ mixed in air balance, 1% nominal concentration accuracy) and a time series data set was subsequently recorded for 10 minutes every 12 hours. The figure shows the mean value of the 10-minute measurements. Error bars represent a 1σ confidence interval (68%).

LI-7810 7-Day CH₄ Precision with Allan Deviation Plot

LI-7810 7-Day CH4 Precision with Allan Deviation Plot — **Figure 2. Seven-day CH₄ stability data from an LI-7810 CH₄/CO₂/H₂O analyzer (top).** A single instrument was operated continuously over a 7-day period with a continuous flow of tank gas. The light blue line shows 1-second measurements; the dark blue line shows a 50-minute block average. Allan deviation plot (bottom) of CH₄ measurements from an LI-7810 measuring mixture of 1970.7 ppb methane and 387.5 ppm CO₂ shows precision at 1-second signal averaging, with improved precision as averaging time increases. Error bars represent 68% (±1σ) confidence intervals based on number of averaged time series available at each τ.

**Key specifications**
General
**Total Weight:** 10.5 kg (including batteries)
**Battery Life:** 8 hours typical with 2 batteries
CH₄ Measurements
**Response Time (T₁₀-T₉₀):** all from 0 to 2 ppm≤ 2 seconds in *Standard Configuration*
≤ 3 seconds in *High Altitude Configuration*
**Range:** 0 to 100 ppm
**Precision (1σ):**0.60 ppb at 2 ppm with 1 second averaging
0.25 ppb at 2 ppm with 5 second averaging
**Maximum Drift:** < 1 ppb per 24-hour period

Choosing your analyzer

The LI-7810 Trace Gas Analyzer is ideal for applications that require long-term CH₄ monitoring, or where precision and stability over time is critical. The LI-7810 is also able to provide a CO₂ measurement. The CO₂ measurements provided by the LI-7810 are appropriate for chamber-based CO₂ flux measurements, such as with the Smart Chamber. Learn more about using the LI-7810 for soil gas flux here.

For applications that demand long-term CO₂ monitoring and exceptionally precise and stable CO₂ measurements, consider the LI-7815.

The LI-7810 is not designed for eddy covariance applications—which requires higher frequency measurements, but as a closed path analyzer it can be used for pCH₄ measurements. If you need higher frequency measurements for the eddy covariance method, consider our eddy covariance solutions.

LI-COR LI-7810 Trace Gas Analyzers for CH4/CO2/H2O | For more information, contact us.

Brochure

Trace Gas Analyzers

Field guide to instruments for the earth sciences

Posters

Development of Trace Carbon Dioxide Isotopologue Analyzer – Performance Evaluation Study

Long-Term Atmospheric Monitoring of Background CH₄ and CO₂ at Mace Head Atmospheric Research Station, Ireland Using LI-COR LI-7810 and LI-7815 Trace Gas Analyzers

How do soil temperature and moisture regulate N₂O flux from an urban lawn?

Measuring Very Small Soil Fluxes of N₂O & CH₄ Using a New OF-CEAS Technology

Development of Trace Methane and Trace Carbon Dioxide Analyzers – Performance Evaluation Studies, GCWerks Integration, and Results of Field Deployment

Performance validation of new high precision CH₄ and CO₂ analyzers based on optical feedback cavity enhanced absorption spectroscopy

Methane and Carbon Dioxide Measurements with New High-Precision Low-Power Low-Maintenanace Closed-Path Analyzers: First Lab and Field Results

Chamber-based Soil Methane Flux Measurement

Measuring CH₄ and CO₂ with New Generation High-Precision Low-Power Low-Maintenance Closed-Path Analyzers: Lab and Field Results

Features

What makes LI-COR different?

LI-COR offers hardware, software, and analyzers that are based on extensive scientific research and testing. Patented designs minimize disruption of natural soil gas transport across the soil surface and record high-precision flux measurements to evaluate spatial and temporal variability.

Together, this integrated system provides an entirely comprehensive research solution for measuring large- and small-scale events—including CO₂, CH₄, or N₂O greenhouse gas emissions.

Designed for flexibility and convenience

LI-COR soil gas flux systems combine more than 20 years of experience with the latest innovations for flexibility and convenience.

+ See the difference

LI-COR Soil Flux System with Smart Chamber, LI-8250 Multiplexer, LI-7810 Trace Gas Analyzer and LI-870 Gas Analyzer.

LI-7820 N2O/H2O Trace Gas Analyzer taking a survey measurement

Tailored for dependable practicality

Each LI-COR gas analyzer is portable, durable, and simple to deploy—allowing you to take CO₂, CH₄, and N₂O survey and long-term measurements with ease.

Engineered to reduce artificial impact

The importance of soil gas flux chambers to take accurate measurements is often underestimated. An inherent challenge to chamber design is the influence the chamber may have on measurements.

All LI-COR chambers are designed to minimize chamber interference on the natural soil gas flux, and gas production and consumption, leading to accurate, consistent measurements.

+ See the difference

LI-COR soil chambers reduce artificial impact

SoilFluxPro™ Software

SoilFluxPro Software simplifies the management and processing of large soil gas flux datasets. SoilFluxPro is powerful, free software included with LI-COR soil gas flux solutions. View, revise, and recompute flux data, get advanced guidance on deadband and stop time, perform quality assurance and quality control, and much more.

+ See the difference

Downloads

Brochure

Trace Gas Analyzers

Field guide to instruments for the earth sciences

Posters

Development of Trace Carbon Dioxide Isotopologue Analyzer – Performance Evaluation Study

Long-Term Atmospheric Monitoring of Background CH₄ and CO₂ at Mace Head Atmospheric Research Station, Ireland Using LI-COR LI-7810 and LI-7815 Trace Gas Analyzers

How do soil temperature and moisture regulate N₂O flux from an urban lawn?

Measuring Very Small Soil Fluxes of N₂O & CH₄ Using a New OF-CEAS Technology

Development of Trace Methane and Trace Carbon Dioxide Analyzers – Performance Evaluation Studies, GCWerks Integration, and Results of Field Deployment

Performance validation of new high precision CH₄ and CO₂ analyzers based on optical feedback cavity enhanced absorption spectroscopy

Methane and Carbon Dioxide Measurements with New High-Precision Low-Power Low-Maintenanace Closed-Path Analyzers: First Lab and Field Results

Chamber-based Soil Methane Flux Measurement

Measuring CH₄ and CO₂ with New Generation High-Precision Low-Power Low-Maintenance Closed-Path Analyzers: Lab and Field Results