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A fast local monitoring of dilute no by a tunable laser

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3 Author(s)
Koga, R. ; Dept. of Electronics, School of Engng., Okayama Univ., Okayama, Japan ; Kosaka, M. ; Sano, H.

Describes a real-time noncontacting, point-monitoring system for nitrogen monoxide. The monitoring system uses a grating-tuned pulsed dye laser and a specially developed microcomputer-assisted signal processor system. The system is sensitive for analyzing a gas concentration from 0.03 parts per million per meter (ppm/m) theoretically (which should be divided by an optical path length) to 0.4 ppm/m experimentally. The system reliability as well as the capability to detect sulfur dioxide which shares the spectral region with nitrogen monoxide was investigated.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:IM-31 ,  Issue: 2 )