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Abstrak Penggunaan LPG sebagai bahan bakar alternati f pengganti bahan bakar minyak dirasakan lebih efektif dan praktis . Namun kandungan senyawa di dalamnya memiliki efek yang negati f jika menguap di udara bebas. Sistem detektor gas LPG dapat menjadi salah satu solusi untuk mengetahui lebih dini terjadinya kebocoran gas. Implementasi sistem detektor gas LPG pada penelitian ini berupa sistem monitoring nirkabel yang dilengkapi alarm sebagai indikasi jika terjadi kebocoran gas. Sistem terdiri dari bagian Remote Controller dan Master Controller. Remote Controller menggunakan mikrokontroler ATMega16 yang terintegrasi dengan sensor MQ5, LCD dan transceiver RF APC220. Sedangkan Master Controller berupa komputer (PC) yang dapat menampilkan kondisi ruangan yang dideteksi oleh bagian Remote Controller. Sistem berhasil mendeteksi gas LPG dan menampilkan kadar konsentrasinya dalam rentang 200 sampai dengan 1000 ppm. Ketika kadar konsentrasi gas mencapai 5000 ppm, alarm aktif secar a otomatis dan memberikan status waspada. Pengiriman data secara nirkabel dengan adanya sejumlah penghalang berhasil dilakukan sampai jarak 200 m. Kata kunci : Sistem Monitoring, Remote Controller, Master Controller, LPG, RF APC220 Abstract The use of LPG as a fuel alternative to fossil fuels may be more effective and practical. Neverfluless its compound has a negative effect if it evaporates to the air. LPG gas detector system may be one solution to determine the early occurrence of gas leak. The detector system implementation in this study was a wireless monitoring system that ha d alarm to indicate if there was the gas leak. The system consist ed of the Remote Controller and the Master Controller. Remote Controller us ed ATmega16 microcontroller integrated with MQ5 sensor, LCD and RF transceiver APC220. While the Master Controller in the form of a computer (PC) that c ould display a room condition was detected by the Remote Controller section. LPG gas system successfully detect ed and display ed the levels of concentration in 200 up to 1000 range ppm. When the concentration of gas reach ed 5000 ppm, the alarm activated automatically and provide d alert status. The wirelless s ending data wi th a number of barrier s was carried out successfully up to a distance of 200 m. Keywords : Monitoring System, Remote Controller, Master Controller, LPG, RF APC220

Sistem Monitoring Pendeteksi Kebocoran LPG berbasis Mikrokontroller ATmega16 menggunakan RF APC220