Abstract: The invention relates to a fluid meter comprising an outside wall of determined thickness to which a flange connected to a pipe is fixed via fixing members which penetrate into holes organized respectively in the thickness of said flange and in said outside wall in order to install said meter on said pipe, said meter having an opening for fluid feed which is organized in the outside wall and behind which there is provided a “feed” chamber into which the fluid coming from the feed opening flows, wherein the fluid meter also has studs disposed inside the feed chamber so as to modify the fluid flow, and in which internal perforations are provided in alignment with the holes for receiving portions of said fixing members.

Abstract: The invention concerns a fluid meter including a body comprising a fluid intake opening and a fluid evacuation opening aligned along a first direction A, a measuring unit formed of a fluid oscillator including at least one obstacle disposed into an oscillation chamber and which is provided with one fluid inlet and one fluid outlet, characterized in that the inlet and outlet of the fluidic oscillator are aligned along a second direction C approximately perpendicular to the first direction.

Abstract: An apparatus measures the flow rate of a fluid. The apparatus comprises a fluidic oscillator provided with an elongate slot in a direction Oz and suitable for forming a jet of fluid that oscillates in a plane Oxy perpendicular to the Oz direction, and an obstacle located upstream from the slot to modify the distribution of speeds in the flow. The obstacle is in the flow at least in the central portion thereof and is implemented in the form of a substantially plane plate.

Abstract: An aerodynamic enclosure is placed in the flow, the enclosure including an opening enabling the enclosure to be filled with the flowing fluid, and having a thermal pulse generator mounted flush with its wall, which generator is suitable for emitting modulated thermal pulses simultaneously to the outside and to the inside of the enclosure. A first thermal sensor is located in the flow and a second thermal sensor is located in the enclosure. The sensors measure propagation times or phase shifts of the thermal waves respectively in the flow and in the non-flowing fluid, thereby making it possible to deduce the value of the fluid flow rate while compensating for any variations in the temperature, pressure, and composition of the fluid. The invention is applicable to gas metering.