A Wireless Sensor Network (WSN) is a form of ad hoc network consisting of tens to thousands of distributed autonomous tiny computing devices each equipped with sensors, a wireless radio, a processor, and a power source. Because of military applications such as battlefield surveillance the wireless sensor networks are originally developed. Since the network life time depends on power consumption, energy is considered as an important issue. The proposed work aims at overcoming the energy issue. Optimal cluster heads are elected. Super node is elected on the basis of minimum distance Cluster head is selected on the basis of threshold probabilistic method.