Device for measuring fluid flow

A device for measuring fluid flow in a pipe, the device comprising:

• (a) A pipe section comprising an even number of walls in the range 4-16, a first and second end, and a longitudinal axis, the pipe section of polygonal cross-section, and wherein the ratio of the width to the height of the cross-section is in the range 0.3:1 to 1:0.3;
• (b) A plurality of ultrasound transducers, wherein each ultrasound transducer comprises an emitter and receiver, each ultrasound transducer arranged on the walls of the pipe section and generating a signal when the transducers emit ultrasound through any fluid flowing in the pipe section and/or receive said ultrasound;
• and
• (c) A signals converter for processing the signals into a fluid flow rate value;
• wherein opposing walls of the pipe section are of identical length and width;
• wherein the plurality of ultrasound transducers comprise pairs of ultrasound transducers arranged on opposing walls and/or the same wall of the pipe section,
• wherein the device comprises at least two pairs of ultrasound transducers,
• wherein each pair of ultrasound transducers comprises a first and second ultrasound transducer, the first ultrasound transducer arranged to emit ultrasound through any fluid flowing in the pipe section towards the second ultrasound transducer and to receive ultrasound emitted by the second ultrasound transducer,
• wherein the first and second ultrasound transducers are in spaced arrangement in a direction parallel to the longitudinal axis of the pipe section.