Abstract: For flow measurement a device with a compact housing and a fixable hinged cover has a measuring channel for inserting a flexible tube such that it becomes deformed in a defined way. The measuring channel extends over the entire width of the housing. A measuring cell arranged in the center of the measuring channel has four ceramics I, II, III, IV, integrated in a sound-decoupled way and facing each other diagonally in pairs, which are placed in lateral parts on the left and on the right of the measuring cell, and a base plate limiting the measuring cell downwards in the direction of an installation space for an electric evaluation system, wherein the base plate also limits the remaining area of the measuring channel from below.

Abstract: The invention relates to a method (30) of and an apparatus (1) for determining a flow rate of a fluid and detecting gas bubbles or particles in the fluid. In order to provide a method (30) and an apparatus (1), which can be used to perform more precise measurements and to provide a better safety, the invention provides that a collapse of an amplitude of an ultrasonic signal is used for detecting gas bubbles or particles.

Abstract: The invention relates to a device for the contactless flow measurement of fluids in flexible tubes.