Photopyroelectric detection of organic vapors

W. Rumpler; H.-D. Liess

doi:doi:10.1051/jp4:19947119

Issue		J. Phys. IV France Volume 04, Number C7, Juillet 1994 8th International Topical Meeting on Photoacoustic and Photothermal Phenomena 8 ITMP³ / 8éme conférence internationale de photoacoustique et photothermique


Page(s)		C7-507 - C7-510
DOI		https://doi.org/10.1051/jp4:19947119

8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP³ / 8éme conférence internationale de photoacoustique et photothermique

J. Phys. IV France 04 (1994) C7-507-C7-510
DOI: 10.1051/jp4:19947119

Photopyroelectric detection of organic vapors

W. Rumpler and H.-D. Liess

Institut für Physik, Fakultät für Elektrotechnik, Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany

Abstract
The photopyroelectric (PPE) detection of vapors under ambient conditions is demonstrated. A polymer film coated on the transducer is used as sensitive layer. Sorption within this layer binds and concentrates the vapor molecules at the detector surface. Monochromatic IR-radiation selectively excites the sorbed molecules and, therefore, the detected heat is a function of vapor concentration. Preliminary experiments yield a detection limit of 30 ppm methanol vapor.