Diode-laser Based Photo-acoustic Spectroscopy In Atmospheric No­2 Detection

Mitrayana Mitrayana • T. Pierera • B. W. M. Moeskops • S. Persijn • H. Naus 4 more
Journal article Berkala Ilmiah MIPA • 2007

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(English, 6 pages)


We have developed a simple, low cost, and compact NO2 detection system. It's based on photoacoustic spectroscopy (PAS) method uses a diode laser as a source of radiation. The PAS system has a detection limit of 10 ppbv for NO2. With this set-up we were able to detect the NO2 concentration from urban air near our campus. We have also investigated the NO2 dissociation effect on the PAS system via NO measurements using a direct absorption spectroscopy method on quantum cascade laser (QCL) system.

Keywords: photoacoustic spectroscopy




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