Ultrasonic meter

An ultrasonic meter 44 is described for measuring a flow-rate of a fluid, including a flow conduit 5 for the fluid. The flow conduit 5 extends along a first axis 6 between a first opening 7 and a second opening 8. The ultrasonic meter 44 also includes two or more pairs of ultrasonic transducers 2, 3. Each pair of ultrasonic transducers 2, 3 is configured to define a corresponding beam path 9 intersecting the flow conduit 5 within a measurement region 13 of the flow conduit 5. Substantially every part of each beam path 9 makes a non-zero angle with the first axis 6. When viewed projected onto a plane perpendicular to the first axis 6, a projection of a first beam path 91 intersects 25 a projection of a second beam path 92. The ultrasonic meter 44 also includes a flow deflecting member 26 supported between the first opening 7 and the measurement region 13. When viewed projected onto the plane perpendicular to the first axis 6, a projection of the flow deflecting member 26 at least partially overlaps the intersection 25 of the projections of the first and second beam paths 91, 92. An insert for an ultrasonic meter, comprising the flow deflecting member is also claimed. Also claimed is: An ultrasonic meter comprising: one or more pairs of ultrasonic transducers, wherein substantially every part of each beam path makes a non-zero angle with the first axis, and wherein when viewed projected onto a plane perpendicular to the first axis, a projection of a first beam path intersects a peak flow region; a flow deflecting member supported between the first opening and the measurement region, wherein, when viewed projected onto the plane perpendicular to the first axis, a projection of the flow deflecting member at least partially overlaps the intersection of the first beam path and the peak flow region; wherein the peak flow region is defined relative to a projection onto the plane of a flow conduit of a reference ultrasonic meter which is identical to the ultrasonic meter except for omitting the flow deflecting member; wherein the peak flow region corresponds to a region of the plane in which a flow velocity through the reference ultrasonic meter is above a mean flow velocity in response to passing a steady state fluid flow through the reference ultrasonic meter at a Reynolds number of approximately 3000.