Trace analyser TGA200A

gasfor ambient airfor environmental assessments

The TGA200A Trace-Gas Analyser measures trace-gas concentrations in an air sample using tunable-diode laser absorption spectroscopy (TDLAS). This technique provides high sensitivity, speed, and selectivity. Its simple design allows it to measure one of many gases by choosing an appropriate laser source. The TGA200A features a 1.5 m single-pass optical measurement system that uses a thermoelectrically cooled laser. The TGA200A is housed in a rugged environmental enclosure designed for use in demanding climates ranging from high-latitude boreal forests, permafrost, and tundra to agriculturally intensive mid-latitude regions and equatorial rainforests. Common applications include slow gradient or high speed eddy-covariance flux measurements of nitrous oxide, methane, or isotopologs of carbon dioxide in all global ecosystems. Campbell Scientific has been manufacturing TGAs since 1993, and the TGA200A is the result of over 20 years of research and development. Even though previous generations of the TGA (TGA100, TGA100A, and TGA200) have the same core technology, the TGA200A builds upon this succession with further improvements. Benefits and Features - Small sample cell volume that provides superior frequency response - Thermoelectrically cooled laser; no cryogenic cooling required - Laser upgrades available to existing TGA customers; contact Campbell Scientific for more information - Choice of laser sources to measure CO2 isotopes, N2O, or CH4 - Optically simple measurement system that does not require cleaning of the optical cell in the field - 500 Hz measurement rate that supports excellent synchronization