Samsidar, Samsidar, Kania Nursawitri, Radi Purbakawaca, Suparman`Suparman, Muhammad Ridho, Jajang Nurjaman, Aris Irfan, and Muhammad Ikhsan. “Kalibrasi Sensor Mq-7 Dan Mq-136 Terhadap Sensor Ecom J2kn Pro Sebagai Alat Pengukur Gas Buang (Co Dan So2) Pada Proses Roasting Kopi”. Talenta Conference Series: Science and Technology (ST) 2, no. 2 (June 30, 2019). Accessed May 18, 2024. https://talentaconfseries.usu.ac.id/st/article/view/491.