Abstract
• New method to detect gasoline level that is safe from fire and explosion risk. • The sensor mechanism is based on hydrostatics pressure principle. • Sensor able to detect up to 180 cm with resolution of 0.6 cm. A simple and fire safe gasoline level sensor has been designed based on displacement sensor using fiber coupler . The sensing principle is to detect displacement of reflector , which is attached to membrane (reflector displacement device), due to the change of gasoline hydrostatic pressure. The displacement of reflector can be detected using fiber coupler from the change of optical power light reflected by the reflector. Three kinds of reflector displacement device used in this experiment are one-layer, two-layer, and three-layer membrane. The experimental results are 0–180 cm of dynamic range, 100–140 cm of linear range, 3.2 mV/cm of sensitivity, and 0.6 cm of resolution for reflector displacement device with one-layer membrane for emptying the tank process. The hysteresis data for emptying and filling the tank process yields the mean of difference 20% for one-layer membrane.
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