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21 September 1995 Remote sensor system for on-line detection of hazardous organic compounds
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Proceedings Volume 2503, Air Toxics and Water Monitoring; (1995)
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany
Remote monitoring of toxic emissions is a major task in environmental and public safety control. Most applications in this field demand fast and robust sensors. We present a fiber- optical sensor system for the time resolved indirect monitoring of volatile organic compounds. The transducer is based on the interferometric measurement of the thickness of thin polymer films. When exposed to organic vapors, the polymer absorbs the components rapidly and reversibly. The corresponding volume change is detected with a resolution of 5 10-6 r.u.. The limits of detection are within a few ppm for many hazardous compounds. The transducer is characterized with respect to stability of the sensitive coatings, sensitivity, and selectivity.
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Steffen Kaspar, Gerolf Kraus, and Guenter Gauglitz "Remote sensor system for on-line detection of hazardous organic compounds", Proc. SPIE 2503, Air Toxics and Water Monitoring, (21 September 1995);

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