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.
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|Measurement Rate||500 Hz|
|Sample Cell Volume||200 mL|
|Dimensions||211 x 47 x 55 cm (83 x 18.5 x 21.5 in.)|
Typical Measurement Noise
Allan deviation with 100 ms averaging time.
|Nitrous Oxide (N2O) - Laser pn 30478||1.5 nmol mol-1|
|Methane (CH4) - Laser pn 30477||7.0 nmol mol-1|
|Nitrous Oxide (N2O) - Laser pn 31121||1.8 nmol mol-1|
|Carbon Dioxide (CO2) - Laser pn 31121||0.3 μmol mol-1 (based on the 13C16O16O isotopolog)|
|Carbon Dioxide (CO2) - Laser pn 31119||0.15 μmol mol-1|
|δ13C - Laser pn 31119||0.5 ‰|
|Carbon Dioxide (CO2) - Laser pn 30877||0.5 μmol mol-1|
|δ13C - Laser pn 30877||2.0 ‰|
|δ18O - Laser pn 30877||2.0 ‰|
|Analyzer (TE-cooled laser)||90 to 264 Vac, 47 to 63 Hz, 34 W (max) 22 W (typical)|
|Heater||90 to 264 Vac, 47 to 63 Hz, 150 W (max) 50 W (typical)|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Data is collected from the TGA200A using a Campbell Scientific datalogger. The TGA200A is compatible with dataloggers that support SDM communications. In many cases, a sampling system containing a datalogger is ordered with the TGA200A. Contact Campbell Scientific for more details about sampling systems and compatibility with user-supplied components, such as leaf chambers.
The TGA200A firmware is used to support the TGA200A or prior TGA models that have been upgraded to use a thermoelectrically cooled (TEC) laser.
The TGA firmware includes the OS that must be uploaded to the analyzer's CPU board before operating a TEC laser.
Warning: Download of TGA200A Firmware should only be done for use with TGA models running TEC lasers!
The TGA TEC Support Software is used to support the TGA200A or prior TGA models that have been upgraded to use a thermoelectrically cooled (TEC) laser.
TGA TEC is a user-interface software package that allows users to connect to the analyzer, set settings, and monitor real-time analyzer performance.
TGA TEC 1.1 is compatible with the Windows 7 operating system or newer.
Warning: Download of TGA TEC v1.1 should only be done for use with TGA models running TEC lasers!