Title :
An optrode type sensor to measure dissolved oxygen in water
Author :
Campo, J.C. ; Pérez, M.A. ; González, M. ; Ferrero, F.J.
Author_Institution :
Dept. de Ingenieria Electr. y Electron., Oviedo Univ., Spain
Abstract :
Oxygen concentration in water is an important parameter in several industrial processes, for instance, in water treatment plants or in fish-farms. Electrochemical sensors provide a simple way to determine the oxygen concentration. However, these sensors present important drifts and they need continuous maintenance. Optical sensors are suitable for long term measurements. Most of the optical sensors are based on the measurement of fluorescence lifetimes or fluorescence intensities. In this paper, we present a fiber-optic oxygen sensor based on the measurement of phosphorescence lifetime of Al-Ferron in Sol-gel support. A silicone and nylon membrane is used to separate the sensor from the water. Sterm-Volmer ratio is used to determine the oxygen concentration
Keywords :
chemical sensors; fibre optic sensors; membranes; organometallic compounds; oxygen; phosphorescence; sol-gel processing; water treatment; Al-Ferron; O2; O2 concentration; O2-H2O; Sterm-Volmer ratio; dissolved oxygen; fish-farms; fluorescence intensities; fluorescence lifetimes; industrial processes; nylon membrane; optical sensors; optrode type sensor; phosphorescence lifetime; silicone membrane; sol-gel support; water treatment plants; Chemical sensors; Electrodes; Electromagnetic coupling; Fluorescence; Optical fiber sensors; Optical fibers; Optical sensors; Oxygen; Phosphorescence; Stationary state;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1999. IMTC/99. Proceedings of the 16th IEEE
Conference_Location :
Venice
Print_ISBN :
0-7803-5276-9
DOI :
10.1109/IMTC.1999.776083
