New optical hydrogen sensor with fast response time based on multilayer palladium-nickel-PTFE thin film for explosion-proof detection of high H<sub>2</sub> concentrations of 1-100%

Gero Bramann; Bernd Zacharias; Marion Wienecke

doi:10.1117/12.738422

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2 July 2007 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%

Gero Bramann, Bernd Zacharias, Marion Wienecke

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Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66191L (2007) https://doi.org/10.1117/12.738422
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

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.

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Gero Bramann, Bernd Zacharias, and Marion Wienecke "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%", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191L (2 July 2007); https://doi.org/10.1117/12.738422

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