The invention refers to a fluid flow device (200), e.g. used in intravenous therapy, for determining a fluid flow rate, including: a drop chamber (202), having an interior (204), a fluid input (208), and a fluid output (210)； a drop detector (212) coupled to the drop chamber and configured to detect a fluid drop (214) at the fluid input； a pressure sensor (216) configured to monitor a pressure in the interior of the drop chamber； and a flow rate device (218) configured to determine a fluid flow rate based on a number of fluid drops detected over a time period, and the pressure in the interior of the drop chamber. A flow control device (224) (e.g. a magnetic valve) may preferably be coupled to the drop chamber and configured to increase or decrease the number of fluid drops detected over a time period in response to a signal from the flow rate device. Optionally, a communications unit (222) configured to control the flow control device (224) may be included.
