| Numéro |
J. Phys. IV France
Volume 04, Numéro C7, Juillet 1994
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique |
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|---|---|---|
| Page(s) | C7-515 - C7-518 | |
| DOI | https://doi.org/10.1051/jp4:19947121 | |
8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-515-C7-518
DOI: 10.1051/jp4:19947121
Photothermal and Optoelectronic Diagnostic Laboratory, Department of Mechanical Engineering and Center for Hydrogen and Electrochemical Studies (CHES), University of Toronto, Toronto, Canada, M5S 1A4
© EDP Sciences 1994
8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-515-C7-518
DOI: 10.1051/jp4:19947121
Purely thermal wave based non-chemical photopyroelectric gas sensor : application to hydrogen
M. Munidasa, A. Mandelis and A. KatzPhotothermal and Optoelectronic Diagnostic Laboratory, Department of Mechanical Engineering and Center for Hydrogen and Electrochemical Studies (CHES), University of Toronto, Toronto, Canada, M5S 1A4
Abstract
A commercially available polyvinylidene fluoride (PVDF) pyroelectric film with an optically generated thermal wave field has been introduced as the active device for a new non-chemical hydrogen gas sensor. The sensitivity to hydrogen at low flow rates (< 500 ml/min) is obtained through thermal boundary condition changes introduced by the gas at the film-gas interface. Photopyroelectric voltage amplitude and phase changes due to hydrogen-air mixtures with respect to pure air, obtained through a lock-in amplifier are discussed.
© EDP Sciences 1994