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Compact photoacoustic gas sensor based on broadband IR source

: Schmitt, K.; Müller, A.; Huber, J.; Busch, S.; Wöllenstein, J.

Postprint (PDF; )

Eurosensors XXV Conference 2011 : September 4.-7., 2011, Athens, Greece
Amsterdam: Elsevier, 2011 (Procedia engineering 25.2011)
Eurosensors <25, 2011, Athens>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IPM ()

We present the realization of a novel, compact IR-optical gas sensing system based on photoacoustic detection. A modular detection cell in combination with a long-path cell allowed the detection of CO 2 and ethylene (C 2H 4) using a broadband IR source (thermal emitter). The system performance was investigated both in simulations and experiments using CO 2 and ethylene as target gases. The experimental results were in good accordance with the simulation results. We aimed at the integration of low-cost components and the miniaturization of the complete system to open up the possibility for sensor networks. Furthermore, the modular detection cell allows the optimization of the optical path length within the measurement cell and thus the adaptation to different target gases. © 2011 Published by Elsevier Ltd.