MQ Ultrasonic Open Channel Flow Meter

Apure MQ Ultrasonic Open Channel Flow Meter using open channel technology, based on the calculation method of velocity and water level, by measuring the height of fluid level, combined with the geometric dimensions of standard weir groove, slope coefficient, channel accuracy, hydraulic ramp, vertical plane correction coefficient of velocity, and then through the microprocessor calculation inside the instrument to get the flow. It consists of three parts: water level sensor, flow sensor and calculator. The water level sensor is used to measure the water level in the nullah, the flow sensor is used to measure the flow rate and the calculator calculates the flow rate based on the water level and flow rate.

Because of non-contact measurement, open channel flowmeters can be used in harsher environments. Open channel flowmeter under the microcomputer control, transmitting and receiving ultrasonic wave, according to the transmission time calculated open channel flowmeter from the measured liquid level distance, so as to get the liquid level height, because of the liquid level and flow between a certain proportion, so according to the calculation formula can finally get the liquid flow Q.

The operating principle of an open channel flow meter is based on the following equation:

Q = A * V

• Q is the flow rate (m³/s)
• A is the flow area of the open channel (m²)
• V is the flow velocity (m/s)

Advantages

• Simple structure, easy to install: the structure of the nullah flowmeter is usually simple, easy to install, maintenance workload is small.
• Wide measurement range: the measurement range of open channel flow meter is wide, it can measure the water flow from small flow rate to larger flow rate.
• High measurement accuracy: modernized nullah flowmeter, such as ultrasonic nullah flowmeter, electromagnetic nullah flowmeter, etc., high measurement accuracy, can meet the requirements of most applications.
• Wide range of application: nullah flowmeter can be used to measure various shapes of nullahs, including rectangular, trapezoidal, circular and so on.
• Unaffected by water quality: The measurement principle of open channel flow meter is independent of water quality, so it is not affected by water quality.
• Moderate price: the price of open channel flow meter is relatively moderate, cost-effective.

Specifically, weir tank type nullah flowmeter structure is simple, inexpensive, suitable for measuring the flow of relatively stable nullah; ultrasonic nullah flowmeter measurement accuracy, not affected by water quality, suitable for measuring a variety of shapes of nullahs; electromagnetic nullah flowmeter measurement accuracy, applicable to a wide range, suitable for measuring various types of water; Doppler-type nullah flowmeter measurement accuracy and applicable to a wide range, suitable for measuring sediment or impurity carrying Doppler type nullah flowmeter has high measuring accuracy and wide range of application, suitable for measuring the water flow carrying sediment or impurity.

Applications

• Water conservancy engineering: used to measure the flow of rivers, canals and other open channels, to provide a basis for water resource management, flood control and drainage.
• Agricultural irrigation: Used to measure the amount of water used for farmland irrigation and improve the efficiency of water resources utilization.
• Industrial production: Used to measure the flow of open channels in industrial production process, such as power plants, chemical plants, etc.
• Sewage treatment: Used to measure the flow of sewage in sewage treatment plants, providing a basis for sewage treatment process control.