Agriculture requires a certain amount of water and the land has a maximum liquid holding capacity that should not be exceeded. Water pressure provides the kinematic energy used on irrigation systems to spray the water on the field. The amount of water that the irrigation system can provide per hour should be carefully monitored to save water in dry areas. The paper presents a system with wireless nodes for water flow measurement in several pipes simultaneously. The system employs YF S201C flow sensors, connected to wireless nodes. Each node sends reports every second to a master node connected to a computer. The received data is presented in a web-based platform to see the current water flow on each of the three pipes. Results show sensor nodes exhibit a 4% average error, and 9% packet loss maximum. Both values are adequate for crop irrigation applications.