N2O Isotopic Analyser

LGR’s Isotopic N2O Analyser is the world’s first commercial analyser capable of measuring isotopic site-specific nitrogen and isotopic oxygen nitrous oxide. The intramolecular distribution of 15N in N2O can provide useful information about the geochemical cycle of N2O because many biological and chemical processes have distinct isotopic signatures.

N2O is a linear, non-symmetric molecule (N–N–O), with one nitrogen atom at the center (a site) and one at the end (b site). Therefore, one can distinguish between two structural isomers containing one heavy isotope of nitrogen, namely 14N15N16O and 15N14N16O, referred to as 15Na and 15Nb, respectively.

Features and Benefits

  • Measurements of site-specific isotopic nitrogen in N2O(14N15N16O, 14N15N16O N2O)
  • Measurements of δ15N, δ15Na and δ15Nb enable quantification of N2O sources and sinks
  • Measurements of δ18O allow quantification of nitrification processes.
  • No cryogens or water cooling
  • High-resolution absorptionspectra are viewable for instrument diagnostics
  • (optional) Multiport Inlet Unit enables measurements at multiple locations
  • (optional) Dynamic Dilution System extends upper range of measurements by 100x
  • (optional) Manual Injection allows measurements of small volume samples via syringe

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.

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