Electromagnetic open channel flowmeter uses the principle of "area velocity method" to measure the flow rate of open channels. The system has a built-in open channel flow model, which uses the single point velocity method combined with hydrology and fluid dynamics to deduce the average flow velocity of the river channel through the single point velocity method, and calculates the water flow rate by combining the water level and the cross-sectional area of the water flow. Its components include open channel converter, electromagnetic flow velocity sensor, liquid level gauge, and solar power supply system.

Suitable for flow measurement in rivers, streams, irrigation and drainage channels, hydraulic engineering, factory drainage, and most sewers.

Instrument composition

Characteristics

(1) The measurement range is large (flow velocity range 0.05-10m/s), and the flow measurement is not affected by the backflow of tributaries;

(2) The structural design of the flow velocity sensor conforms to fluid mechanics, with a compact size and easy installation. It can be directly installed in standard channels without the need for modification, and has low construction costs;

(3) The measurement signal is stable and less affected by channel water flow;

(4) Can simultaneously display channel liquid level, flow rate, instantaneous flow rate, and cumulative flow rate;

(5) Using EEPROM to store cumulative traffic, data can be saved for a long time after power failure;

(6) Large screen dot matrix display, not only in Chinese, but also with graphics for easy operation and flow analysis;

(7) Optional real-time display of flow velocity curves and graphical software for easy analysis and research of water flow patterns;

(8) Equipped with RS485 communication port, it can achieve remote data transmission;

(9) Portable with data storage function, convenient for measuring and analyzing situations.

(1) Measurement accuracy: flow rate ± 1.0%; Liquid level ± 0.5%; Flow rate ± 5%;

(2) Measurement range: flow velocity range 0.05-10m/s;

(3) Applicable channels: rectangular channels, trapezoidal channels, custom shaped channels, channel width ≥ 0.2m; channel depth ≥ 0.1m;

(4) Display content: flow rate (m/s), liquid level (m), instantaneous flow rate (m ³/h), cumulative flow rate (m ³);

(5) Power consumption: DC12V/24V power supply, supporting system less than 5W; AC220V power supply, supporting system less than 20W;

(6) Protection level: Sensor IP68; Converter: IP65;

(7) Data communication: RS485: Modbus protocol