Accurate Flow From the Correct Parshall Flume Equation Parshall Flume Ultrasonic Flow Meter is designed for municipal, industrial and irrigation channels fitted with a Parshall flume. Using the wrong throat size, head reference or sensor position can create systematic flow error even when the level reading itself is stable. A dedicated ultrasonic controller converts measured upstream head into instantaneous flow and accumulated volume using the programmed flume relationship. Measure Head Without Touching the Water The ultrasonic sensor measures liquid level without touching the medium. The controller converts that level into flow using the programmed equation for a Parshall flume, rectangular weir, equal-width weir or triangular weir, and displays both instantaneous flow and accumulated volume. Gallop lists automatic temperature compensation, adjustable interference shielding and multiple built-in channel algorithms. Standard product information also identifies 4-20 mA, RS485 and RS232 outputs, 24 VDC or 220 VAC supply options, and split waterproof or compact configurations. Non-contact sensing is useful in dirty or corrosive water and avoids adding another obstruction to the flume. This page can naturally support buyer terms such as open channel flow measurement, ultrasonic level sensor, flow totalizer, flume flow meter and weir flow monitoring. Commission Around Throat Size and Submergence Provide the exact throat width, expected minimum and maximum head, free-flow or submerged condition and the manufacturer-defined measurement point; verify the flume is level and undamaged. Specify local display, totalization, pulse or analog scaling and digital communications so calculated flow remains consistent across the meter, PLC and reporting system. Accuracy depends on correct flume or weir construction, a stable upstream approach, the correct zero reference and a clear acoustic path; foam, heavy vapor, turbulence and submerged primary devices require engineering review. The current product pages list project ordering from one unit and OEM or ODM availability. Confirm lead time, private-label scope, drawings and country-specific approvals for the selected configuration before issuing the purchase order.