OCS, CO2, CO, H2O Analyser - Trace Gas

Since OCS uptake by vegetation is associated with photosynthetic CO2 uptake, but not with respiration, simultaneous measurements of OCS and CO2 may serve as a new and potentially powerful method to study gross photosynthesis. LGR’s OCS Analyser (carbonyl sulfide) reports OCS and CO2 simultaneously at ambient levels with extremely high precision. In addition, the OCS Analyser also measures carbon monoxide (CO), and water vapor (H2O) to allow for reporting on a dry mole fraction basis without the need for sample drying, or any post correction procedure.

The Analyser is extraordinarily simple to use, may be set up in minutes and does not require cryogens or water cooling.

LGR’s OCS Analyser is designed to study CO2 ecosystem exchange but may also be used for other demanding applications including trace gas monitoring, eddy-correlation flux measurements, chamber flux measurements, and combustion diagnostics. The Analyser is particularly well suited for measurements in the field since it is similar to versions that have been successfully deployed on-board NASA DC-8 aircraft for measurements in the upper troposphere and lower stratosphere. LGR’s OCS Analyser is essentially unaffected by other atmospheric gases or changes in atmospheric pressure.

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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