Sewage flow meter working principle and design concept: Which industrial areas use the flow meter “If it cannot be measured, it cannot be managed.†This is a mantra in the industrial field and is particularly suitable for flow measurement. Simply put, the demand for traffic monitoring is increasing, and often higher speeds and accuracy monitoring are also required. There are several areas in which industrial flow measurements are important, such as household waste. As people pay more and more attention to environmental protection, in order to make our world cleaner and less polluting, the disposal and monitoring of waste becomes very important. Humans consume a lot of water, and as the global population grows, the amount of water used will increase. Flowmeters are critical and not only monitor domestic wastewater, they are also an integral part of the process control system in a wastewater treatment plant. Figure 1. Sewage treatment plant schematic Flow meters are also used in many industrial control processes, including chemical/pharmaceutical, food and beverage, pulp and paper, and others. Such applications often require measuring the flow in the presence of large amounts of solids - most flow technologies do not easily qualify for this requirement. In the field of transport metrology, high-end flow meters are required to handle product transfer and payment between the two parties. One example is the delivery of oil through large piping systems. In this application, even small changes in the accuracy of the flow measurement over time can result in losses or significant benefits for one party. Electromagnetic induction technology is ideal for liquid flow measurement For the liquid flow measurement, the sewer flow meter technology has many advantages. Its sensor is generally connected to the pipe, its diameter is consistent with the diameter of the pipe, so measurement does not interfere with or limit the flow of the media. Since the sensor is not directly immersed in the liquid and there are no moving parts, there is no wear problem. The electromagnetic method measures volume flow, which means that the measurement is insensitive to changes in parameters such as fluid density, temperature, pressure, and viscosity. Once calibrated with water, the electromagnetic flowmeter can be used to measure other types of conductive fluid without further calibration. This is an important advantage that other types of flowmeters do not have. Sewage flow meters are particularly suitable for measuring solid-liquid two-phase media, such as muds and other highly conductive media with suspended solids, solid particles, fibers, or viscous materials. It can be used to measure sewage, mud, pulp, pulp, chemical fiber pulp and other media. This makes it particularly suitable for food, pharmaceutical and other industries, using it to measure corn syrup, juice, alcohol, drugs, plasma and many other special media. Sewage flow meter working principle The working principle of sewage flow meter is based on Faraday's law of electromagnetic induction. According to Faraday's law, when the conductive fluid flows through the magnetic field of the sensor, an electromotive force proportional to the volume flow is generated between the pair of electrodes, and the direction is perpendicular to the flow direction and the magnetic field. The magnitude of the electromotive force can be expressed as: Among them, E is the induced potential, k is a constant, B is the magnetic flux density, D is the inner diameter of the measuring tube, and v is the average velocity of the fluid in the measuring tube on the axial section of the electrode. Figure 2. Sewage flow meter working principle More details: Ming Yu automatic flow meter
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