Model LWIA-24EP - Liquid Water Isotope Analyzer



The Los Gatos Research (LGR) Liquid Water Isotope Analyzer provides measurements of δ18O and δ2H of water in liquid (including wines) and discrete vapor samples with unsurpassed performance. Measurements of both δ18O and δ2H are reported at the unmatched speed of (at least) 1080 injections per day, which corresponds to 180 total samples and 150 unknowns per day (while still incorporating 6 injections per sample). For measurements of even more samples per day, LGR provides users with the option of reducing the number of injections per sample. For highest performance, LGR now offers the LWIA in the acclaimed Enhanced Performance package for unparalleled stability and accuracy. For measurements of water vapor as well as liquid water in one instrument, please refer to LGR's new Isotopic Water Analyzer. For measurements of isotopes in wine, please refer to the description in LGR's Wine Isotope Analyzer.

  • 1080 injections/day (180 total samples/day, 150 unknowns/day)
  • Only analysis software capable of accurately quantifying and correcting for contaminants
  • Only analyzer capable of measuring multiple isotope ratios in wine without sample preparation
  • New EP model delivers unsurpassed precision and accuracy
  • Only analyzer to report hIgh-resolution absorption spectra in real time
  • Unrivaled reliability
  • Proven worldwide in the lab and in the field
  • Also measures discrete water vapor samples
  • Single instrument provides High Performance and High Throughput Modes

LGR’s new “Enhanced Performance” series incorporates proprietary thermal control for ultra-stable measurements with unsurpassed precision, accuracy and drift as validated at leading labs throughout the world.

The LWIA is ideal for a wide variety of hydrological, analytical, and biological applications that involve measurements of fresh water, seawater, and other liquids. The Analyzer’s ease-of-use, field durability, and high throughput make it the industry standard analyzer for these types of measurements. LGR’s Liquid Water Isotope Analyzer is used by researchers, scientists, governmental agencies and intergovernmental organizations on all 7 continents.

LGR’s patented technology, a fourth-generation cavity enhanced absorption technique, has many advantages (simpler, easier to build, rugged) over older, conventional cavity ringdown spectroscopy (CRDS) techniques. As a result, LGR Analyzers provide higher performance at lower cost.

All LGR analyzers have an internal computer (Linux OS) that can store data practically indefinitely on an internal hard disk drive and send real time data to a data logger via the digital (RS232) or Ethernet outputs. In addition, the Analyzer includes LGR’s acclaimed Post Analysis Software which automatically performs many analysis procedures on liquid measurements that were previously done by researchers after the data was collected. Among the capabilities of LGR’s software are to automatically apply calibration standard measurements made during the sample run, to graphically display all results, and to diagnose instrument operation. Moreover, the Post Analysis Software includes LGR’s proprietary Spectral Contamination Identifier (SCI) technology, the only software proven to accurately quantify and correct for the presence of organic contaminants in water samples.

As with all LGR analyzers, the LWIA may be fully controlled remotely via the Internet. This capability allows the user to operate the analyzer using a web browser practically anywhere Internet access is available. Furthermore, remote access allows full control of the instrument and the opportunity to obtain and share data and diagnose the instrument operation without being on site.

Enhanced Performance model:
  Guaranteed: High Performance Mode
  δ2H:  0.2‰
  δ18O: 0.03‰

  Typical: High Performance Mode
  δ2H:  0.15‰
  δ18O: 0.02‰

  Guaranteed: High Throughput Mode
  δ2H:  0.5‰
  δ18O: 0.1‰

  Typical: High Throughput Mode:
  δ2H: 0.3‰
  δ18O: 0.05‰

Standard model:
  Guaranteed (High Performance Mode):
  δ2H: 0.3‰
  δ18O: 0.1‰

  Typical (High Performance Mode):
  δ2H: 0.2‰
  δ18O: 0.07‰

  Guaranteed (High Throughput Mode):
  δ2H: 0.6‰
  δ18O: 0.2‰

  Typical (High Throughput Mode):
  δ2H: 0.4‰
  δ18O: 0.1‰


Standard model: 1080 injections/day (180 total samples, 150 unknowns)
EP model: 800 injections/day (133 total samples, 107 unknowns)

10' H x 38' W x 14' D (Standard model)
11” H × 38” W × 22” D (Enhanced Performance model)

27 kg (Standard model)
40 kg (Enhanced Performance model)

Operating Requirements

Operating Temperature
5-45 °C (standard)
0-50 °C (EP)

Power Requirements
115/230 VAC; 50/60 Hz
150 watts (standard model)
180 watts (EP model)

Sample Temperature
0-50 °C

Sample Volume
1 microliter per injection


Data Storage
Internal Hard Drive

Digital (RS232), Ethernet, USB

greater than 40 parts per thousand salinity level (40 PSU)

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