CH4 / N2O / H2O Analyser - Trace Gas

Los Gatos Research (LGR) announces a new analyser capable of reporting methane and nitrous oxide simultaneously and continuously. LGR’s CH4/N2O Analyser is capable of measuring ambient levels of both N2O and CH4 with high precision in real time with data rates up to 10 Hz. In addition, the analyser reports water vapor mole fraction simultaneously and reports dry N2O and CH4 mole fractions without the need for sample drying. The Analyser is easy to use, simple to service, may be set up in minutes and does not require cryogens or water cooling.

The CH4/N2O Analyser is designed for many demanding applications including trace gas monitoring, eddy-correlation flux measurements, and chamber flux measurements. Based on the acclaimed N2O/CO Analyser, the CH4/N2O Analyser is particularly well suited for measurements in the field. The Analyser is essentially unaffected by other atmospheric gases or changes in ambient pressure.

Features and Benefits

Developed for applications requiring fast response and highest accuracy
• Real-time continuous and simultaneous N2O, CH4 and H2O measurements
• Sub-ppb precision (N2O, CH4) in less than 1 second
• Measurement rates up to 10 Hz (external pump required)
• Reports N2O and CH4 on a dry and wet mole fraction basis automatically
• No cryogens or water cooling
• Operational in minutes; no training
• Simple to service in the field
• High-resolution absorption spectra are viewable for instrument diagnostics

All LGR Analysers now come with a 2 Year Warranty as standard, underlying the quality and robustness of their manufacture and high reliability. Warranties can also be extended to 3 or 4 years at additional cost, at the time of purchase. Please enquire for further details.

Under normal operation and for the vast majority of applications, LGR Off-axis ICOS gas analysers require the minimum of servicing and maintenance.

One of the many benefits of this technology is long-term unattended reliability in the field.

LGR Advantages

Annual maintenance would normally include an inspection of the internal pump (or external pump if fitted) and the replacement of the pump diaphragm and valve seals if necessary.

This can be carried out by the user themselves or by ET either on site or back in the ET workshop (for a maintenance quote, please contact us).

ET recommends that LGR Analyser users consider the purchase of a field maintenance kit which includes:

  • Replacement solid-state hard-drive with LGR operating system and specific system files pre-loaded, for quick and simple swap-out in the field if ever necessary.
  • Pump maintenance kit (internal) to include spare pump diaphragm and valve seals.
  • Mirror cleaning kit.


Please contact us if you would like to receive a quote for the field maintenance kit.

Additional maintenance will be required for the LGR Liquid Water Isotope Analyser (LWIA) and Auto-injector unit and also the LGR Dissolved Gas Extraction Unit (DGEU).

For these instruments, please refer to the operation manual supplied with these instruments.

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