Device and method for ultrasonic measurement of the fluid flow velocity and flowrate

A device for measuring flow velocity and flowrate of fluid passing in a flow main direction, the device comprising:

• a casing, means for separating the fluid into a plurality of flows, each of the plurality of flows being passed in a channel allocated for it and located in the casing;
• at least one pair of ultrasonic transducers installed in the casing and configured for forming and receiving ultrasonic waves crossing the channels and for generating electric signals in response to receiving the ultrasonic waves;
• means for directing the ultrasonic waves along an acoustic path crossing at least part of the channels;
• means for calculating the flow velocity and flowrate using the electric signals,
• wherein the means for directing the ultrasonic waves along the acoustic path is at least a pair of openings in the casing and a plurality of openings in the channels.