Dependable Plant Flow Without Wet-Side Contact Wastewater Ultrasonic Open Channel Flow Meter is designed for wastewater influent, interstage channels, bypasses and treated discharge points. Grease, suspended solids and corrosive wastewater make contact sensors difficult to maintain, while regulatory reports depend on consistent totalized flow. Non-contact level measurement helps operators monitor hydraulic loading, balance processes and document discharge without putting the transducer in the stream. Built-In Flume and Weir Calculations 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. The controller can apply the equation for the installed flume or weir and provide local indication plus signals for plant automation. 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. Protect Accuracy With Correct Primary-Device Setup Verify primary-device dimensions, upstream approach conditions, zero head and maximum level, and position the transducer where foam, splashing and turbulence are minimized. Specify daily and cumulative totals, engineering units, 4-20 mA scaling and RS485 or RS232 communications to align with the plant historian and compliance workflow. 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. Gallop has focused on flow and level instrumentation since 2005 and presents in-house R&D, ISO 9001:2015 and CE evidence. Ask for the exact datasheet, certificate and calibration record that apply to the quoted model.