Ultrasound flow metering instrumentation for measuring the volume of a liquid that has transferred over a period of time.
Ultrasonic sensors are contactless measurement devices which transmit and receive high frequency acoustic waves to measure flow velocity of a fluid.
Since there is no contact with the fluid to be measured, ultrasound sensor technology can be used in applications where sensors requiring contact are otherwise prohibited. These sensors have no moving parts which makes them very reliable, requiring very little maintenance.
Ultrasonic sensors can be housed in a single assembly combining the acoustic transmitter and receiver in one device, or in dual assembly separating the acoustic transmitter and receiver.
An ultrasonic flow meter is an instrument which can measure either directly or indirectly the volume of a fluid which is passing through a specific location in a set period of time.
Ultrasonic flow meters actually measure the speed of the flow rather than directly measure the volumetric flow rate. The flow speed measurement is converted into a volumetric flow rate by multiplying the flow velocity by the cross-sectional area of the duct or pipe where the volumetric flow meter is installed, i.e. Q = v · A.
Ultrasonic flow meters can provide an analogue, digital or pulse output of the volumetric flow rate.
An ultrasonic flow meter may also include additional electronics such as a digital indicator for displaying the total volume measured to date.