Microcontroller-based performance enhancement of an optical fiber level transducer

A proposed digital microcontrolled transducer for liquid-level measurement is based on two optical fibers from which the cladding was removed in suitably spaced zones at known distances. A 1-m full-scale, 6.25-mm resolution prototype was made and tested. The adopted hardware and software strategies assure a low-cost, high-static, and dynamic performance, good reliability, and the possibility of remote control. These features were confirmed by the experimental tests carried out on gasoline.