8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-511-C7-513
Photopyroelectric detection of hydrogen/oxygen mixturesC. Christofides and A. Mandelis
Photothermal and Optoelectronic Diagnostics Laboratory, Department of Mechanical Engineering and Center for Hydrogen and Electrochemical Studies (CHES), University of Toronto, Toronto, Canada, M5S 1A4
It has been found that the photopyroelectric (PPE) sensor made of thin film polyvinylidene fluoride (PVDF), sputter-coated with palladium, can detect trace hydrogen gas in the presence of pure oxygen without significant drift and stabilization problems. Presently, hydrogen concentration as low as 0.1% in flowing 99.9% oxygen has been detected under STP conditions. The detector has been used without a reference sensor (single-ended mode) which simplifies the sensor system compared to previous work.
© EDP Sciences 1994