INTRODUCTION

          Liquefied petroleum gas or known as LPG or liquid propane gas is a flammable mixture of hydrocarbon gases as a fuel in heating appliances and also widely used in automobile or manufacturing sector. Liquefied petroleum gas (LPG) consists of two different type which is propane and butane. Propane has a lower boiling point compare to butane and it is stored at a higher pressure. Both of the substances are the liquefied petroleum gases most commonly found commercially. Butane is commonly used for mobile heaters and leisure applications through warmer months while propane is predominately used for domestic heating, cooking and industrial applications. Thus, propane is stored in bulk tanks which can be situated above ground or underground. Liquefied petroleum gas provides benefits to the world such as it produces less exhaust emission and it is cheaper than petrol. However, it also is potentially hazardous and it is a flammable gas which can cause a major damages and harmful to organic life such as humans and animals.

            A gas detector is use to detects any presence of various gases within an area and commonly use as part of a safety system. To avoid and reduce the negative effects, a liquefied petroleum gas (LPG) gas sensor is made as gas detection equipment used for detecting propane gas in industrial settings, home and automotive. It is an ideal sensor to detect any presence of a dangerous liquefied petroleum gas (LPG). It is easily incorporated into an alarm unit, to sound an alarm or give a visual indication of the liquefied petroleum gas (LPG) concentration. The sensor has excellent sensitivity combined with a quick response time. The sensor is also design to sense other gas leakage such as iso-butane, LNG and cigarette smoke.

            A gas leakage detector system is made to improve any existing sensor installed in the industry of manufacturing or automotive and even at home. The purpose of this device is also to avoid and reduce any harmful to the humans or animals and any major damages to any buildings. The system made able to moves the sensor device all around the selected area where liquefied petroleum gas (LPG) is applied and sound the alarm when detecting any presence of a dangerous liquefied petroleum gas (LPG) which carry a flammable characteristic.