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Proceedings Paper

New optical hydrogen sensor with fast response time based on multilayer palladium-nickel-PTFE thin film for explosion-proof detection of high H2 concentrations of 1-100%
Author(s): Gero Bramann; Bernd Zacharias; Marion Wienecke
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Paper Abstract

Hydrogen detection is of great interest in many fields such as hydrogen concentrations around the explosive limit of 4% or in areas where strong electrical fields are present. Optical sensors have the advantage that they are not affected by these conditions. A comparison of three thin film sensors made of Pd, Pd Ni and Pd Ni / PTFE to detect H2 is made. The double-sided samples are purpose built by plasma sputtering, with a thickness of 4nm on each side. It is shown that the signal of a pure Pd deposit is strong but it cannot resist higher H2 concentrations. The Pd Ni deposit has shown good results and is able to resolve even higher concentrations of 10% H2 but cannot resist high concentrations of H2 over many cycles. The new Pd Ni / PTFE deposit can be used many times for concentrations up to 100% without any damage and can detect concentrations of 1-100% of H2. Furthermore the response time for deposits of different thickness is tested.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191L (2 July 2007); doi: 10.1117/12.738422
Show Author Affiliations
Gero Bramann, Hochschule Wismar, Univ. of Technology, Business and Design (Germany)
Bernd Zacharias, Forschungs-GmbH Wismar (Germany)
Marion Wienecke, Hochschule Wismar, Univ. of Technology, Business and Design (Germany)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors

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