Instrument for measuring water flow velocity Automatically Displays Flow Velocity via Integrated Sensor and Calculator

Instrument for measuring water flow velocity consists of a propeller-type flow velocity sensor, a flow velocity calculator, and a measuring rod. It features a velocity measurement range of 0.06 to 8.00 m/s and a measurement error margin of ≤1.5%. Once the signal cable is connected, the device automatically displays the flow velocity, making it suitable for measuring flow rates in open channels such as rivers, lakes, reservoirs, and irrigation canals.

Instrument for measuring water flow velocity is a versatile instrument designed for flow velocity measurement in hydrological surveys. It comprises three main components: a propeller-type flow velocity sensor, a flow velocity calculator, and a measuring rod assembly (0.4m × 4 sections, Ø16mm). The complete set is housed within a high-quality aluminum alloy carrying case with a combination lock, ensuring ease of transport and convenient field deployment. This instrument is primarily utilized to measure the time-averaged flow velocity at predetermined points within the cross-sections of rivers, lakes, reservoirs, and canals. It is applicable across various sectors, including hydrological surveying, water conservancy investigations, agricultural irrigation, runoff experiments, municipal drainage, industrial wastewater management, water resource administration, open channel flow monitoring, hydraulic engineering projects, and construction site drainage/sewage flow measurement.

The operating principle of Instrument for measuring water flow velocity is based on the characteristic that the rotational speed of the propeller-type sensor—when immersed in flowing water—is directly proportional to the flow velocity. The sensor is secured to the measuring rod and positioned at a designated measurement point; as the water flow drives the propeller to rotate, the sensor converts this rotational motion into electrical pulse signals, which are then transmitted to the flow velocity calculator. The calculator acquires, processes, and computes these signals to directly display the measured flow velocity value. Once the operator connects the signal cable, measurement results can be obtained immediately without the need for manual conversion calculations. With a velocity measurement range of 0.06 to 8.00 m/s and a maximum error of 1.5%, the device fully complies with the accuracy requirements for flow velocity measurement stipulated in hydrological surveying standards.

In practical applications, Instrument for measuring water flow velocity is characterized by its ease of operation and portability. The measuring rod assembly consists of four 0.4-meter sections (Ø16mm); these sections can be combined to form rods of varying lengths according to the specific water depth, thereby accommodating measurement requirements for water depths ranging from 0.4 meters to 1.6 meters. The sensor features a propeller-type design that minimizes interference with water flow, making it suitable for a wide variety of aquatic environments, including open channels, rivers, and pipelines. The accompanying measurement unit is equipped with a built-in microprocessor that performs signal filtering and data processing; this enables the device to automatically eliminate measurement interference caused by water flow fluctuations, thereby ensuring data stability. The complete instrument kit is housed within a durable aluminum alloy carrying case, providing effective protection for both the sensor and the measurement unit while facilitating easy transport and long-term storage.

In fields such as hydrological forecasting, hydraulic engineering design, and water resource management, the Instrument for measuring water flow velocity provides reliable data support regarding flow velocity. By measuring the time-averaged flow velocities at various points across a specific cross-section of the water body—and combining these readings with the cross-sectional area—the total discharge volume can be calculated, thereby providing foundational data for hydrological forecasting, water resource allocation, and hydraulic engineering planning. This instrument serves diverse applications: it can be used to monitor water conveyance efficiency in agricultural irrigation channels, to detect flow velocities within sewage networks in municipal drainage systems, and to conduct long-term flow velocity observations at hydrological stations situated along rivers and lakes. Renowned for its stable performance and user-friendly operation, the Instrument for measuring water flow velocity has become a widely adopted tool for flow velocity measurement within the hydrological and hydraulic engineering sectors.