PERANCANGAN ALAT UKUR KETINGGIAN PERMUKAN AIR BERBASIS SENSOR ULTRASONIK MAXSONAR MB7389 DAN MIKROKONTROLER ATMega328P

In this study, a low-cost water level measurement device based on an ultrasonic sensor was developed. The used is Maxsonar MB7389, and the data acquisition system uses ATMega328P Microcontroller. Meanwhile, displayed in real-time computer also stored microSD card where can be retrieved at any time for analysis. choice of MB7389 sensing levels its superiority resistance so that it applied field, resolution up to millimeters. microcontroller contained Arduino Uno board has advantages terms relatively price, ease program using open-source IDE software, supported by many libraries, modules. Based results laboratory-scale testing, developed measure quite accurately. That seen from average error sensors without casing 0.31 cm with PVC pipe sheath 0.25 cm. Then, value Pearson correlation coefficient (R2) 0.99 casings, 1 casings. ripple comparison measurement, suggested highly fluctuating (such as sea river) should use casing. measuring tank not too volatile, you