Abstract: An ultrasonic measurement device measures a volume-related quantity of a fluid flowing from a first zone to a second zone of the device. The device includes two ultrasound transducers emitting and receiving ultrasound signals and each disposed in one of the zones to define between them an ultrasound measurement path in the fluid. The device also includes a measurement electronics block that drives emission and reception of ultrasound signals by transducers, measures a physical magnitude characteristic of the propagation speed of said signals in the fluid and deduces the volume-related quantity of the fluid from these measurements and the geometry of the device. This determines the volume-related quantity of the fluid on the basis of measurements of a physical magnitude that is characteristic of the propagation speed of ultrasound signals in the fluid.