Indonesian Journal of Electrical Engineering and Computer Science Vol. 19, No. 2, August 2020, pp. 1048~1054 ISSN: 2502-4752, DOI: 10.11591/ijeecs.v19.i2.pp1048-1054  1048 Journal homepage: http://ijeecs.iaescore.com A smart gas leakage monitoring system for use in hospitals Nadia Mahmood Hussien 1 , Yasmin Makki Mohialden 2 , Nada Thanoon Ahmed 3 , Mostafa Abdulghafoor Mohammed 4 , Tole Sutikno 5 1,2,3 Computer Science Department, Collage of Science, Mustansiriyah University, Iraq 4 Imam Aadham University College, Iraq 5 Department of Electrical Engineering, Universitas Ahmad Dahlan, Indonesia Article Info ABSTRACT Article history: Received Jan 13, 2020 Revised Mar 15, 2020 Accepted Mar 22, 2020 A gas leaks lead to personal and financial damage. Much effort has been dedicated to preventing such leaks and developing reliable techniques for leak detection and leakage localization using sensors. These sensors usually sound an alarm after detecting a dangerous gas in its vicinity. This paper describes a system for detecting a gas leakage from cylinders which notifies the user via the GSM network. The system consists of an LPG gas leakage detector which sends a warning signal to Arduino Uno Microcontroller. The system uses the GSM network to send notifications, a liquid crystal display (LCD) monitor to display the warning message and buzzer to sound the alert. Keywords: Arduino Gas leaking detector GSM MQ2 sensor MQ9 sensor Security system SMS Copyright © 2020 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Yasmin Makki Mohialden, Computer Science Department, Collage of Science, Mustansiriyah University, Baghdad, Iraq. Email: ymmiraq2009@uomustansiriyah.edu.iq 1. INTRODUCTION The The use of gas for medical purposes is often vital, therefore the gas cylinder warehouse is considered an integral part of any hospital. Hospitals usually have even an extensive gas supply network that deliver a number of different types of gases to vaious locations inside the hospital such as patient and operating rooms [1, 2]. For safety reasons, hospitals must have a smart gas leakage monitoring system. This system becomes even more useful and effective when it is linked to global system for mobile communication (GSM). Mohammed et al [3-6] that way, the system will be capable of sending a warning message to the hospital´s saftey personals in case the system detects any gas leakage [7]. Hospitals, clinic, and community health institutions will be completely distinct from different work ambiences [6, 8]. Tending frameworks are complicated and there exist several belongings that must be comprehended and varieties of hospital systems, patient care, insurance, tending suppliers, and legal problems [9-11]. There exists a good sort of health framework throughout the universe, conjointly since several histories alongside healthcare frameworks as there exist several nations. Fundamentally, country should style and frame health systems in connection with the wants and resources, through shared components in just about all health frameworks are basically healthcare along with the health aspects [4, 12, 13]. In various countries, health system coming up with is dispersed among market participants. In many cases, there’s a united endeavor among governments, charities, trade unions, spiritual establishments, or different coordinated bodies to afford planned healthcare offerings aimed at the populations they focus on. On the contrary, healthcare has been represented in the form of a typical biological process instead of revolutionary [14-16].