A hazardous gas detection system for aerospace and commercial applications

Author:

Hunter Gary1,Neudeck Philip1,Chen Liang-Yu1,Makel Darby2,Liu C.3,Wu Q.3,Knight D.4

Affiliation:

1. NASA, Lewis Research Center, Cleveland, OH

2. Makel Engineering, Chico, CA

3. Case Western Reserve Univ., Cleveland, OH

4. Cortez/NASA, Lewis Research Center, Cleveland, OH

Publisher

American Institute of Aeronautics and Astronautics

Reference16 articles.

1. MEIis continuing this work with potential application ofhydrogen sensors in a variety ofindustrial environments. For example,useofahydrogen sensor to detect degradation ofthe health oftransformers isbeing explored. Aselectricalinsulation in a transformer breaks down prior toitsfailure, hydrogen is released. Monitoring of hydrogen in-situ in thesetransformerscan provide early detection of transformer degradationand avoid costly catastrophicfailure of transformers in the field. The PdAgsensors have already been applied to automotiveleak testing applications15and thecomplete product has been internationally recognized with a 1995 R&D100 Award. Other possibleapplications include the monitoring ofhydrogen releasesfrom fuel cellsand industrial safety monitoring.

2. Hunter, Gary W. "A Survey and Analysis of Experimental Hydrogen Sensors",NASA Technical Memorandum 106300,October 1992.

3. Lundstrom,L;Armgarth,M.; and Petersson,L. "Physics with Catalytic Metal Gate Chemical Sensors, CRCCritical Reviewsin Solid State and Materials Sciences",vol.15, pp.201-278,1989.

4. Thin‐film palladium and silver alloys and layers for metal‐insulator‐semiconductor sensors

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