In many places in our country and all around the world, many fire accidents due to leakage of LPG are happening due to carelessness and other purposes. Liquefied Petroleum Gas is colourless and odourless liquid which readily evaporates into a gas. Normally some chemicals are been added to it to help detect leaks manually, when there is no one at home, it may lead to a great accident. It is classified as highly inflammable. This is the major problem faced by human beings in today’s life. A minor mistake can lead to major effects on human life, as committing mistakes is human’s nature. In order to rectify this problem, an idea has been proposed for ensuring the safety of human beings who is in trouble. A device has been constructed that detects the LPG leakage correctly with the use of gas sensor and alerts the person with alarm and light signal. In conventional method, if the person comes to know that the LPG is leaking, the following necessary methods will be executed namely closing the knob of the LPG cylinder and opening the windows for ventilation to avoid fire accidents. The design of the proposed device is very low cost, so that it can be used in all houses without any problems. This minor step in controlling the fire accidents will make a great change in our life. As the cost of this device is low this can be availed by all our people living in urban and rural areas. In addition to above, even the life of children can also be protected thereby death rate can be reduced due to fire accidents. LPG are generally stored and distributed as a liquid and it is widely used for process and process and space heating , cooking and automotive propulsion. If the liquid leaks it will quickly evaporate and form a relatively large cloud of gas which will drop to the ground, as it is heavier than air, when they meet with a source of ignition it can burn or explode. To avoid this, the proposed device will be helpful.