Millimetric-resolution liquid level sensing: a multi-point POF approach for aerospace safety applications

This paper presents a study of a prototype liquid-level detection system using multi-point Polymer Optical Fiber (POF) sensors. Two sensor configurations were tested, demonstrating a linear operating region between 3 cm and 11 cm. The results highlight a trade-off between sensitivity and stability, with the 2 cm configuration achieving a resolution of 1 . 61 mm. These results vali-date a cost-effective and simple POF solution with potential for aviation and industrial use.