Rancang Bangun Sistem Monitoring Electrical Conductivity Berbasis PLC S7-1200 dan Node Red Pada Area BOP 2 PT. Krakatau Chandra Energy. INHARDWARE [Internet]. 2026 Jun. 20 [cited 2026 Nov. 11];4(1):22-9. Available from: https://jih.akamigas.ac.id/index.php/inhardware/article/view/36