Abstract: The invention relates to an apparatus for measuring a flow of a fluid in dependence on time, in particular a urine flow, including an intake funnel; a hose; an ultrasonic flow sensor; an overflow. The apparatus is characterized in that a first end of the hose is connected to the intake funnel and a second end of the hose is connected to the overflow; the ultrasonic flow sensor is arranged on the hose; the hose is U-shaped.

Abstract: An ultrasonic measuring cell for measuring the volume flow of a fluid flowing in a tube across various external measuring conditions is provided. In an example, the measuring cell includes a continuous central recess to receive the fluid-carrying tube; at least six ultrasonic transducers; at least two inlay regions and optionally at least two ultrasonic interrupter regions. At least a first and a second ultrasonic transducer are positioned on a first side of the central recess and at least a third and a fourth ultrasonic transducer are positioned on a second side of the central recess wherein the first side and the second side are opposite to each other; and the first and the second ultrasonic transducers are aligned in a way that the first and/or the second ultrasonic transducer can emit a measuring signal oblique to the flow direction of a fluid in the tube.