“Kalibrasi Sensor Mq-7 Dan Mq-136 Terhadap Sensor Ecom J2kn Pro Sebagai Alat Pengukur Gas Buang (Co Dan So2) Pada Proses Roasting Kopi: Sensor Calibration of MQ-7 and MQ-136 to Ecom J2kn Pro Sensor As Exhaust Gas Meter (CO and SO2) in Coffee Roasting Process”. Talenta Conference Series: Science and Technology (ST) 2, no. 2 (June 30, 2019). Accessed May 1, 2026. https://talentaconfseries.usu.ac.id/index.php/st/article/view/491.