]>Remote System for Detection of Low-Levels of Methane Based on Photonic Crystal Fibres and Wavelength Modulation Spectroscopy : Figure 9
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Figure 9: Gas chamber for test of the sensing system: (a) and (b) computer generated pictures; (c) and (d) photographs of the implemented gas chamber (the U-benches shown in (d) were used to test the WMS interrogation technique).