Initial work was performed with a 266 nm Nd:YAG laser as source for laser induced fluorescence (LIF).

• Sun, R., Zobel, N., Neubauer, Y., Cardenas Chavez, C., Behrendt, F.: Analysis of gas-phase polycyclic ar-omatic hydrocarbon mixtures by laser-induced fluorescence. Optics and Lasers in Engineering, 2010, 48 (12), 1231-1237.
  http://dx.doi.org/10.1016/j.optlaseng.2010.06.009

In the BioProGReSs-project attemps were undertaken to substitute the Laser with UV LEDs. Principal changes and adaptations to the intial setup were made with a focus to assure stable long term operation in industrial environments. The device was successfully operated in the GoBiGas plant in Gothenburg, Sweden.

• Neubauer, Y., Gredinger, A., Borgmeyer, J., Kleinhappl, M., Biollaz, S. M. A.: Comparison of two on-line tar-monitoring devices with off-line liquid sample tar-analysis operated on a test gas generation system applying ethene pyrolysis. Biomass and Bioenergy, 117, 2018, (63-70)
  https://doi.org/10.1016/j.biombioe.2018.07.009

• Borgmeyer, J., Neubauer, Y.: Continuous On-Line Tar Monitoring for Process Control. in: Proceedings of the 24th European Biomass Conference and Exhibition, 06.-09. Juni 2016, Amsterdam, Netherlands, pp. 472 - 474, ISBN: 978-88-89407-165
  http://dx.doi.org/10.5071/24thEUBCE2016-2BO.2.2