Box-type electromagnetic open channel flowmeter (full-channel wide open channel flowmeter), also known as box-type open channel integrated intelligent monitor, is an open channel measurement flow system composed of flow rate indicator, flow velocity meter and liquid level gauge to measure the flow rate by the flow rate area method.
The box-type open channel flowmeter is suitable for the flow measurement of rectangular and trapezoidal open channels and culverts such as reservoirs, rivers, water conservancy projects, urban water supply, sewage treatment, farmland irrigation, water administration and water resources. The intelligent box-type open channel flowmeter is based on the flow rate-water level operation algorithm, and adopts the water level tracking speed measurement system and microprocessor, so as to ensure the accuracy of the speed measurement and operation of a new intelligent flow system, according to the width of the channel and the requirements of the measurement accuracy, the mathematical model of the first-line method or the multi-line one-point method of open channel flow measurement. The microprocessor in the flow indicator calculates the flow rate of the channel according to the predetermined mathematical model according to the measured water level value, flow velocity value, the geometric size of the channel, the slope coefficient, the channel accuracy, the hydraulic ramp, and the vertical plane correction coefficient of the flow velocity.
The box-type open channel flowmeter has a simple structure, has no moving parts, and is highly resistant to fouling, clogging or corrosion, so it can be used in fluids containing suspended solids or binders. In addition, it has some of the following features:
1. The flowmeter sensor can also be easily installed on any gate of the existing canal. The canal can be an open channel or a culvert, and its cross-section can be rectangular or circular.
2. The flowmeter has a wide measurement coverage, 0-0It can be measured from 3 to 0-10 m sec. Larger flow rates can be measured at the same head by installing a dummy sensor of the same physical size parallel to the original sensor.
3. The flow signal of the flowmeter is linear, so when the flow rate drops from 99% to 0, it has high measurement accuracy. Stable measurements can be made even if the canal is affected by the tides.
4. The flowmeter is suitable for the measurement of open channels, culverts and river channels, and is suitable for the measurement of circular, rectangular, trapezoidal and other shapes of channels, and is not affected by river water, tides and downstream water level changes.
5. The canal flowmeter adopts the first sensor (diversion model) to expand the flow measurement range.
What parameters need to be confirmed in the selection of full-channel wide box open channel flowmeter equipment?
Measuring range: Select the appropriate flow range according to your needs, usually expressed in terms of the volume of liquid or gas passing through the channel per unit time.
Measurement accuracy: Choose the right measurement accuracy for your application needs, usually expressed as a percentage.
Material and corrosion resistance: Choose the right material according to the nature of the fluid, such as stainless steel, plastic, etc., and consider its corrosion resistance.
Interface type: Choose the appropriate interface type according to the installation and connection requirements, such as threaded interface, flange interface, etc.
Power supply mode: Select the appropriate power supply mode according to the site conditions, such as battery power supply, external power supply, etc.
Communication interface: Select whether to have communication functions, such as RS485 and MODBUS.
Protection level: Choose the appropriate protection level according to the site environment, such as waterproof and dustproof level.
Other features: Choose whether you need additional features such as temperature compensation, automatic calibration, etc., depending on your specific needs.
The above are some common specification selections, and the specific specification selection should be determined according to the actual application requirements and site conditions. It is recommended that you communicate with the supplier or manufacturer in detail to obtain the equipment specifications of the full channel wide box open channel flowmeter suitable for your needs.