@article{pinto_duarte_2026,  title={Open-source system for reservoir water level monitoring using ultrasonic sensing},  volume={46},  ISSN={0100-6916},  url={https://doi.org/10.1590/1809-4430-Eng.Agric.v46e20250056/2026},  DOI={10.1590/1809-4430-Eng.Agric.v46e20250056/2026},  journal={Engenharia Agrícola},  publisher={Associação Brasileira de Engenharia Agrícola},  author={Pinto, Jair S. S. and Duarte, Sergio N.},  year={2026},  pages={e20250056} }