CH4 Methane Carbon Isotope Analyser (MCIA)

LGR’s Methane Carbon Isotope Analyser (MCIA) reports measurements of δ13CH4 and methane mixing ratio directly, continuously and without sample preparation. LGR offers three models to span the entire range of methane levels in landfills, mudlogging studies, biogas reactors, and ambient air.

For measurements of methane mixing ratios expected in ambient air near landfills and natural gas leaks, LGR’s MCIA Range 1 provides measurements from 10 to 500 ppm. For applications in which higher levels of methane may be encountered, such as biogas, mud logging and oil/gas exploration, LGR’s MCIA Range 2 provides measurements to >1% (10,000 ppm) methane. For applications requiring the highest sensitivity and lowest sample volume, LGR’s new Range 3, which employs a quantum cascade laser, provides measurements with as little as 1 ppm methane in air.

Moreover, LGR’s Range 3 is insensitive to ethane and other ‘higher’ hydrocarbons. All models may be operated in both continuous flow and batch injection modes (with batch injection option).

Features and Benefits

  • Measurements of δ13C and CH4
  • Data rates as fast as 1 Hz
  • Requires only 150 W (Standard package): ideal for field applications
  • δ13C measurements over a wide range of mixing ratios
  • New -EP model reports over large ranges with negligible drift
  • New model (Range 3) provides δ13CH4 in ambient air (with only 1 ppm methane)

Please choose which specification you require information about

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.

Keep up to date

Contact Us

Like to make an enquiry or ask a question? Or simply have a suggestion about how we could improve our customer service, we'd love to hear from you!