Khakim L, Budihartono E. Performance Analysis of HC-SR04 and JSN-SRT04T Sensors for Optimization of Microcontroller-based Septic Tank Volume Monitoring Tools . IJSTM [Internet]. 2025 May 31 [cited 2026 Jul. 17];6(3):553-60. Available from: https://ijstmjournal.com/index.php/ijstm/article/view/1317