Schilt, S.Besson, J. P.Thévenaz, LucGyger, M.2008-09-292008-09-292008-09-29200510.1109/CLEO.2005.202076https://infoscience.epfl.ch/handle/20.500.14299/29977WOS:000234819901151A multi-gas photoacoustic sensor is reported. Simultaneous measurement of ammonia, carbon dioxide and water vapor is demonstrated at ppm level using semiconductor lasers. In-situ measurements to control the housing conditions of laboratory animals are presentedammoniacarbon compoundschemical variables measurementgas sensorsinfrared spectroscopymeasurement by laser beamphotoacoustic spectroscopysemiconductor lasersspectrochemical analysisContinuous and simultaneous multigas monitoring using a highly sensitive and selective photoacoustic sensortext::conference output::conference proceedings::conference paper