Non-Intrusive Tank-Filling Sensor Based on Sound Resonance García, Adrián Toral López, Víctor Márquez, Álvaro García, Antonio Castillo, Encarnación Parrilla Roure, Luis Morales Santos, Diego Pedro Tank-filling sensor Fill-level sensor Reconfigurable instrumentation Sound resonance Different types of fill-level measurement systems exist in the market, but most of them imply some type of intrusion in the tank itself. In this paper, a reconfigurable system based on sound resonance for measuring the fill-level of a tank from the exterior is presented. A relation between sound resonance frequencies and the content of the tank has been found, especially as the tank gets closer to being full. A prototype has been created using reconfigurable technologies combined with wireless communications in order to control the system from an ad hoc application. With this prototype, the fill-level of different tanks has been measured with good resolution, especially when the tank is over half of its capacity. 2019-04-30T11:36:30Z 2019-04-30T11:36:30Z 2018-12-03 journal article García, A. [et al.]. Non-Intrusive Tank-Filling Sensor Based on Sound Resonance. Electronics 2018, 7, 378; doi:10.3390/electronics7120378. 2079-9292 http://hdl.handle.net/10481/55541 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España MDPI