Wireless Sensor Network (WSN) is an emerging and very interesting technology applied to different applications. WSNs are networks in which thousands of small and battery powered nodes communicate with each other. A WSN consists of number of spatially distributed nodes which are interconnected without the use of wires. Each node is connected with one or more sensors. Each sensor node consists of a radio receiver, a microcontroller and a battery. The WSN is mainly used in area monitoring, environmental monitoring, industrial monitoring, waste water monitoring, structural monitoring, etc.