Beat sensor has shown its large potential to address issues of smart environment monitoring such as real time drought management. This paper presents an efficient temperature Beat sensor for energy efficient, long range smart monitoring systems by combining a new technique of Beat sensor with long range (LoRa) communication protocol. With the compact circuit size and the low energy consumption, the proposed sensor can be applied for Internet of Things based smart monitoring systems. The analysis and experimental results have clarified the advantages of the proposed temperature Beat sensor and its potential applications.