Photopyroelectric detection of hydrogen/oxygen mixtures
作者:
C. Christofides,
A. Mandelis,
J. Rawski,
S. Rehm,
期刊:
Review of Scientific Instruments
(AIP Available online 1993)
卷期:
Volume 64,
issue 12
页码: 3563-3571
ISSN:0034-6748
年代: 1993
DOI:10.1063/1.1144283
出版商: AIP
数据来源: AIP
摘要:
It has been found that the photopyroelectric (PPE) sensor made of thin‐film polyvinylidene fluoride, 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 standard temperature and pressure conditions. The detector has been used without a reference sensor (single mode) which simplifies the sensor system compared to previous work, at the expense of sensitivity limits. This paper describes the detection of hydrogen gas in hydrogen/oxygen mixtures, and deals with some instrumental aspects of the PPE sensor device such as background noise and signal drift. Some techniques for stabilization are also discussed.
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