Abstract: A wireless flow rate apparatus measures flow rate in a fluid-conductive conduit and includes: the fluid conductive conduit comprising a non-rigid wall; a wireless sensor network including a flow sensor that detects vibrations of the fluid-conductive conduit, produces a sensor signal; and a wireless node that receives the sensor signal and wirelessly communicates the sensor signal; a base station that wirelessly receives the sensor signal; and a flow rate analyzer that receives the sensor signal from the base station and determines the flow rate of fluid in the fluid-conductive conduit from the sensor signal.