Soil Flux Trace Gas Measurements

Landfill Continuous Emissions Monitoring System (LCEMS)

For unmanned, continuous emissions monitoring at a great price

LGR now offers the new ground-breaking, "Ultraportable" line of analyzers designed for simultaneous continuous measurements of multiple greenhouse gases (methane, carbon dioxide and water vapor)



EconomicalSave thousands of dollars over other manufacturer's analyzers and methods by using one integrated analyzer. It saves money upfront (due to the economical pricing of the LGR analyzers) and during operation because it requires minimal human involvement after the initial set up, other than for data collection and analysis. In addition, if you use the optional LGR Multiport Inlet Unit you can monitor multiple locations with one system.
Continuous monitoringThe LGR LCEMS is the only continuous monitoring system which can be easily set up and then monitored via the Internet. Other methods provide either a snapshot of the landfill emissions or are prone to data loss due primarily to weather.
Technologically superiorLGR analyzers use state-of-the-art laser absorption methodology based on LGR's patented cavity-enhanced laser absorption spectroscopy technique. This unique approach is both more rugged and more precise than earlier cavity-enhanced techniques, such as conventional cavity ringdown spectroscopy, because LGR instruments do not need ultra-precise alignment or sub-nanometer stability of its optics, or a high degree of thermal control. This ensures higher absolute accuracy, longer maintenance intervals, higher reliability, and reduced cost of ownership.
Continuous monitoring under all weather conditions without data lossThe LGR closed-path analyzer are not affected by weather conditions such as rain, snow, morning dew or even conditions such as dust or aerosols, thus ensuring continuous monitoring of the landfill emissions. As a result, the data collected represents the entire time interval during which you operate the LCEMS.
Better than other methods Drive along the Landfill Perimeter Method:
  1. Higher upfront cost for hardware and set up
  2. High cost of actual method implementation - uses both manpower and a vehicle
  3. Not a continuous monitoring method, you collect only a snapshot of the landfill emissions
  4. Possible vibration, shock/motion problems
Eddy Covariance Method:
  1. Very high upfront costs - could be three times higher compared to the LGR LCEMS
  2. Requires expensive tower or tripod
  3. Not an integrated analyzer system, may require the use of multiple analyzers
  4. Prone to data loss due to weather and environmental conditions (i.e. rain, dust, etc).
Easy to set up and maintainLGR's LCEMS is field tested and rugged. It can be powered with a small battery or on AC power and only uses 60 watts (on DC) of power. All LGR analyzers include user-cleanable optics and no post cleaning alignment is required. When ready to use, the instrument starts working immediately (no warm up required). LGR analyzers are not significantly affected by pressure changes, motion or shock.
Full control via InternetThe LGR LCEMS is fully controllable via the Internet. Use onboard technology to remotely access the instrument via the Internet to:
  • Download data
  • Diagnose the instrument operation
  • Make operational changes anytime
LGR analyzers include an internal computer (Linux OS) with a 40 GB hard drive used for data storage. Data can be sent in real time to a data logger via the digital (RS232), analog or Ethernet outputs.
Monitor a combination of gasesCustomize-Your-Own LCEMS to monitor the gases you want: methane (CH4), acetylene (C2H2), carbon dioxide (CO2) and water vapor (H2O). If you want to measure other gases not listed here, please contact LGR ( We can provide custom analyzers.
Monitor methane carbon isotope (optional)High precision (0.1-1 ‰) precision measurements of δ13C in CH4 with a rapid response time. Because instrument is autonomous and does not require user intervention, it also enables long-term methane isotope monitoring studies. (Note that this analyzer is not available in the Ultraportable package).
MappingUse the data collected and produce maps (via Google Earth) of trace gas concentrations based on time of the day, wind patterns, or create a time series map showing the increase or decrease of trace gas emissions.