Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 Arun Wiratama, Nyoman, Wiharta, Dewa Made, AND Ary Esta Dewi Wirastuti, Ni Made. " RANCANG BANGUN SISTEM MONITORING KETINGGIAN AIR BERBASIS ANDROID MENGGUNAKAN TRANSISTOR WATER LEVEL SENSOR" Jurnal SPEKTRUM [Online], Volume 7 Number 4 (6 December 2020)