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This paper describes an optical fiber sensor for the monitoring of ammonia gas. An open path optical technique is used to analyze the absorption lines of ammonia within the ultra violet region. Experimental results describing the operation of the sensor are presented and are compared with theory. A comparison between a commercial sensor has been carried out and cross sensitivity testing with regard...
A realized novel optical sensor system to measure the concentration of ozone using the emitted light from Light Emitting Diodes in the ultraviolet range is described in this paper. The wavelength selective light interaction of the gas takes place in a fiber coupled and robust reflection cell. The control electronics are separated from the optical sensor head. Therefore it can be used in harsh environment...
Zinc Oxide (ZnO) thin films were prepared on glass substrates using sol-gel coating method and the effect of annealing temperatures on the ZnO properties were investigated. The Current-Voltage (I-V) measurement shows electrical properties are improved with annealing temperatures. X-ray diffraction (XRD) spectra indicate annealed samples having preferential growth at (002) plane and the structural...
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