PGSISO

The precision gas system isotope analyzer (PGSISO) is an atmospheric trace gas monitoring system, measuring continuous CO₂, 12CO₂, 13CO₂, CH₄, CO, and N₂O at 4 tower sample heights of 4m, 10m, 23m, and 46m above ground level at the S10 tower site at the Bankhead National Forest atmospheric observatory (pictured), and formerly at 2m, 4m, 25m, and 60m at the C1 tower site at the Southern Great Plains atmospheric observatory. It is a combination of two systems in series: (1) gas processing components that pressurize, dry, and coordinate measurements of calibration cylinders, and (2) the Spectronus Fourier Transform Infrared Spectrometer developed by Ecotech Pty Ltd.

• Carbon dioxide (CO2) concentration
• Carbon monoxide (CO) Concentration
• Isotope ratio
• Methane concentration
• Nitrogen oxides