The portable ultrasonic open channel flowmeter is a high-precision measuring instrument designed specifically for hydrological monitoring, river flow monitoring, agricultural irrigation, and municipal water supply and drainage industries. It adopts ultrasonic technology and a special low-power design scheme, combined with fully digital signal processing technology, to ensure the stability and reliability of measurement. This device has a wide measurement range and high measurement accuracy, supporting real-time data display, data recording, export, and printing functions. It is easy to operate and has high accuracy, making it very suitable for situations that require frequent movement for measurement.