Flow measuring device

The invention relates to a flow measuring device for measuring a parameter of a flow formed by a fluid, in particular for determining a flow rate of a flow formed by a fluid, the flow measuring device comprising a flow chamber having an inflow section, an outflow section, and a measuring section arranged between the inflow section and the outflow section, the measuring section defining a transport direction for the fluid, wherein at least one ultrasonic device for transmitting and/or receiving ultrasonic waves is arranged in the measuring section. The flow measuring device is characterized in that a flow deflecting device is provided and is configured to deflect the flow in such a way that the flow extends in the measuring section at least regionally obliquely with respect to the conveying direction, and wherein the ultrasound device is configured to emit ultrasound waves through the fluid in one or more sound channels at least substantially perpendicular to the delivery direction, and/or to receive ultrasoun