How Does an Ultrasonic Flow Meter Work?
Open channel flow meters measure the level, flow rate, and total volume of water in weirs, flumes, channels, and partially filled pipes. These meters use a non-contact level sensor to detect water levels and apply Manning’s equation along with channel characteristics to calculate flow rate and volume. Area velocity flow sensors can be installed at the bottom of ditches, channels, or culverts. They use ultrasonic pulses to measure the depth and velocity of the water to be able to calculate the flow rate (flow). These systems are very easy to install due to simpler installation and can save money based on the time it takes to install the flume or weir. Another benefit is that once the sensor is installed, the flow data is recorded into a digital file for future review or water use decisions. Ultrasonic flow meters measure the level in a channel by transmitting a pulse of sound from the face of the sensor to the surface of the flow stream and measuring the time fo...