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Low-cost photoacoustic NO2 trace gas monitoring at the pptV-level

Rück, Thomas ; Bierl, Rudolf ; Matysik, Frank-Michael


We present the development and the characterization of a photoacoustic NO2 trace gas detection system. The system is based on the implementation of low-cost components, i.e. a mass-produced blue diode laser and a standard MEMS Microphone which is commonly built into smartphones, for example. An optimized cell design was realized by means of 3D printing. The linearity of the photoacoustic signal ...


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