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

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

Author Affiliations +

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.

Citation Download Citation

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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