Elster Nv/sa

Arjan Stehouwer

A device for determining a flow characteristic, in particular flow velocity, of a fluid in a conduit, comprises a conduit body (), at least four pairs of ultrasonic transducers (defining swirl sensitive acoustic paths (). The ultrasonic transducers are arranged such that they define paired acoustic paths. The device also comprises means () for measuring the transit times of transmitted ultrasonic waves and for determining a flow characteristic from the measured transit times.

Device and method for measuring a flow characteristic of a fluid in a conduit

A device for determining a flow characteristic of a fluid in a conduit comprises a conduit body (), a first pair of first ultrasonic transducers () defining a first swirl sensitive acoustic path () and a second pair of second ultrasonic transducers () defining a second swirl sensitive acoustic path (), a third pair of third ultrasonic transducers () and a fourth pair of fourth ultrasonic transducers () the transducers () of the third pair being positioned diametrically opposite to each other at the wall () of the conduit body () such that the third transducers () define a third acoustic path () having a single reflection against the inner () wall of the conduit body () and the transducers () of the fourth pair being positioned diametrically opposite to each other such that the fourth transducers () define a fourth acoustic path (), wherein the transducers () are capable of acting individually as a transmitter and receiver for transmitting ultrasonic waves along their respective acoustic paths and receiving thereof, means () for measuring the transit times of transmitted ultrasonic waves and for determining a flow characteristic from the measured transit times.

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Zeewolde, Netherlands

Arjan Stehouwer