LGR's Carbon Dioxide Isotope Analyzers exceed all of these requirements.
LGR's new and improved model CCIA-38 provides measurements of δ13C and δ18O as well as mole fractions (concentrations) of carbon dioxide and water vapor with high precision at measurement rates of up to 1 Hz.
LGR’s improved Carbon Dioxide Isotope Analyzer model CCIA-38 incorporates a new fiber-coupled laser and provides many features that researchers need when measuring isotopic carbon dioxide, including:
• ultra-low drift and high precision
• ability to measure δ18O in CO2
• ability to measure water vapor in air
• δ13C and δ18O measurements for CO2 ranging from 300 to 25000 ppm
• Automatic determination of δ13C, δ18O and CO2 on dry mol basis
LGR's new CCIA-48 provides measurements of δ13C, δ17O and δ18O, as well as mole fraction (concentration) of carbon dioxide, with extraordinary precision at measurement rates of up to 5 Hz.
In addition, LGR’s Carbon Dioxide Isotope Analyzer is easy-to-use and requires low power to facilitate measurements in the field. The instrument provides accurate isotopic ratio measurements over an extremely wide range of CO2 values even when those values change rapidly.
These Analyzers incorporate proprietary internal thermal control for ultra-stable measurements with unsurpassed precision, accuracy, stability and drift. Moreover, only LGR’s analyzers provide reliable measurements (with guaranteed specs) at concentrations more than 20 times greater than typical ambient levels (to 25000 ppm carbon dioxide in air, for model CCIA-38). Furthermore, LGR's Analyzers report measurements over the widest range of ambient temperatures allowing users to easily record data in the field.
In addition, the availability of many value-added options and accessories extends the abilities of the unit to include measurements of discrete samples (collected in bags or vials, for example), to automatically handle multiple inlet sources (e.g., from flux towers or distributed sites for uninterrupted measurements over periods of weeks), and for measurements over an extended range of mole fractions.
The analyzer uses LGR’s patented Off-axis ICOS technology, the fourth-generation cavity enhanced absorption technique, which employs a high-finesse optical cavity as the measurement cell. LGR’s technology has many proven advantages over conventional first-generation cavity ringdown spectroscopy (CRDS) techniques. In brief, since the laser beam does not have to be resonantly coupled to the measurement cell (i.e. precise beam alignment is not critical), LGR Analyzers are relatively inexpensive, simple to build, and inherently robust thermally and mechanically. In addition, since LGR’s technology can record reliable absorption spectra over a far wider range of optical depths (absorbance values) compared with CRDS, LGR Analyzers provide measurements over a much wider range of mole fractions (gas concentrations). Finally, due to the ease and simplicity of recording and quantifying the measured spectra using LGR’s Off-Axis ICOS, LGR Analyzers display the entire absorption spectra to the user in real time allowing for immediate system diagnostics and performance validation.
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