International Journal of Scientific & Engineering Research, Volume 6, Issue 4, April-2015 558 ISSN 2229-5518 IJSER © 2015 http://www.ijser.org Development of wireless sensor network system for LPG gas leakage detection system T.H.Mujawar* 1 , V.D.Bachuwar* 2 , M.S. Kasbe* 3 , A.D. Shaligram** and L.P. Deshmukh* 4 . Abstract— Leakage of a gas in any sector may cause many health issues and hence in the work places it is to be cautioned against such disaster hap- penings by implementing a safety system that can make an early alert to the users. This paper describes the development of wireless sensor network for LPG gas leakage detection. The proposed design includes: an Arduino Nano microcontroller, gas sensor and a XBee. The sensor node will detect a minute concentration of the gas according to the voltage output of a sensor and also collects the gas leakage data thereby locating the specific area of the sensor node. XBee sends the data from gas sensor to the monitoring system that is displayed on LabVIEW GUI. A GSM module was as a communi- cation tool between the microcontroller unit and mobile phone unit. The system could be installed at any remote place and could be controlled by any mobile phone supporting the SMS service. The reliability and productivity of the system are the key concerns and influence the design and development choices for the system in terms of the hardware and software designs. Index Terms— Arduino, Gas leakage detection, GSM shield,Gas leakage monitoring,RSSI, LabVIEW, XBee. ——————————  —————————— 1 INTRODUCTION Natural gases such as liquefied petroleum gas (LPG) are wide- ly used in industries. It is certainly possible that the gases may leak and the system needs to be real time monitored. This pa- per presents design and development of a wireless gas leakage monitoring system by using the Arduino and XBee. The system is configured in star type topology with devices and sensors in it and then controls all the devices through a gateway node with XBee network, and takes safety measures to protect against serious risk. The proposed system uses XBee as a wireless device, sensors and Arduino controller that not only increases the system performance and but provides safe- ty measures also. In actual, the work was carried out using Arduino nano board, MQ-2/MQ-6 gas sensor, XBee and a GSM module. The sensor has excellent sensitivity combined with a quick response time at low cost. Under gas leaked condition message to the author- ized person or family member using Arduino GSM shield is sent automatically. Traditionally, gas leakage detection is monitored by a wired sensor network, wherein power requirements and mainte- nance cost are significantly high “[1]”.To overcome the limita- tions of traditional system wireless sensor network is the best choice. The high power requirement of wired sensor network can be made simpler using WSN technology that uses differ- ent protocol standards for short range wireless communica- tion like Bluetooth, WI-Fi and Zigbee. Nowadays, Zigbee is widely used in gas leakage monitoring applications for real time monitoring of the threat area. The monitoring of the proposed design is done through Lab- VIEW “[2]”, [3]”. Also, GUI created using LabVIEW tool is more interactive, facile and effective compared to the reported methods. 2 SYSTEM ARCHITECTURE AND DESCRPTION Many gas detecting systems are available which can detect different levels of gas concentrations effectively. In this paper we present a wireless sensor network for gas leak detection based on a small-scale and low cost device those achieve Pro- cessing, storing, sensing and communicating. The basic block diagram of the proposed system is shown in figure 1. Fig. 1. Block diagram of a wireless gas sensing s system 2.1 Wireless sensor node The fundamental architecture of the WSN sensor node consists IJSER