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Tunable Diode Laser Absorption Spectroscopy (TDLAS)

TDLAS is a highly sensitive method for measuring the concentration of gaseous species that absorb light in the wavelength range (usually infrared) of a tunable diode laser. With TDLAS it is possible to measure the concentration of trace gases down to the lower ppb level with high time resolution (<1 Hz).

IMK-IFU has two tunable diode laser (TDL) instruments (TGA100A, Campbell Scientific) for nitrous oxide and for isotope-specific carbon dioxide measurements with high time resolution (10 Hz).


TDL instrument for the determination of concentration, δ13C and δ18O of CO2
Contact: Ralf Kiese

TDL instrument for the determination of N2O concentrations, and, coupled to an EC system, for turbulent N2O fluxes


Contact: Ralf Kiese


For more information on TDLAS measurements with the TGA100A, click here.