A transit time ultrasonic flow meter uses ultrasonic transducers that can both send and receive signal. The ultrasonic signal is transmitted between the transducers through the fluid that pass through the flow meter. The transducers are organized so that the sound velocity will interact with the flow velocity. The sound propagation time between the transducers is measured in both directions. If there is no fluid motion the two times are ideally equal but if there is fluid velocity present the interaction with the sound velocity will cause one time, the downstream one, to decrease and the other time, the upstream one, to increase. These two times are used to calculate the flow velocity.
Post time: Jun-23-2022