This book described the implementation of wireless sensor networks for real time monitoring of oil and gas flow rate metering infrastructure. The system maintained a continuous measurement of the flow rate and displayed the result in real time; regardless of where the oil wells are located and allowed for inexpensive monitoring of oil and gas processing from wellheads to export terminals to bring transparency, accountability and reduced corruption in the oil and gas industries. It is focused at harnessing the economic opportunities in the oil and gas sector in Nigeria and the world around.