Sunmonu, R. S., M. A. Sodunke, and E. A. Agboola. “Development of an Ultrasonic Sensor Based Water Level Indicator With Pump Switching Technique”. International Journal For Research In Electronics & Electrical Engineering 3, no. 5 (May 31, 2017): 01–11. Accessed November 23, 2024. https://gnpublication.org/index.php/eee/article/view/435.