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1. Measurement Method of Sewage Flow Meter
1. Measurement Principle of Insertion Doppler Ultrasonic Flow Meter When the sewage contains a lot of sediment or bubbles and flows in a full pipe state, this principle is suitable for use. Because if an electromagnetic flowmeter is used, it will operate well in the first few years, but the reading will gradually decrease after a few years. This is mainly because the sewage is relatively dirty and contains a large amount of viscous dirt, which will stick to the electrode during long-term operation, resulting in a decrease in electrode sensitivity and the electromagnetic flowmeter cannot work normally. If the external clamping ultrasonic principle is used, the measurement effect will also be affected due to poor sound transmission performance of the pipe wall, adhesion of dirt on the inner wall, and contamination of the coupling agent by sensor immersion. By using the insertion Doppler principle, the above problems can be effectively solved. When the installation location is underground or immersed in the front platform, please choose a plug-in sensor with a protection rating of IP68. If the pipe wall is made of cast iron, cement pipe, PVC pipe, corrugated pipe, etc., a clamp can also be added to ensure stable and reliable installation and operation. 2. The measurement principle of the plug-in time difference ultrasonic flowmeter is suitable when the sewage is relatively clear, without too many impurities or bubbles, and is flowing in a full pipe state. Reason as above
3. Weir type ultrasonic liquid level measurement principle If the sewage flows through an open ditch, a suitable weir can be constructed to measure the liquid level with an ultrasonic liquid level
4. Open channel measurement principle adopts the area and flow rate method, and an integrated sensor of liquid level and flow rate is used to measure both liquid level and flow rate. The accumulator then calculates the flow rate based on the cross-sectional shape, flow rate, and liquid level information
5. Electromagnetic flowmeter measurement principle. If the sewage does not pollute or adhere to electrodes, this method can be used, but caution should be exercised.
.2. Which is more worth buying, sonar flowmeter or Doppler ultrasonic flowmeter?
The choice between sonar flowmeter and Doppler ultrasonic flowmeter depends directly on your measuring medium and environment.
. When measuring fluids containing impurities (such as sewage, mud) or requiring non full pipe measurement, choose Doppler; To measure clean full pipe fluids (such as tap water, petroleum) and pursue extremely high accuracy, choose the customary time difference sonar flowmeter. 1. Measure the characteristics of the medium for clean fluids such as tap water and petroleum. The conventional time difference sonar flowmeter can achieve an accuracy of ± 0.5%, making it a more suitable choice. Fluid containing impurities, such as sewage, mud, or multi bubble fluids, Doppler ultrasonic flow meters can measure by capturing particle motion, making them more adaptable. Installation and maintenance: Doppler flow meters usually support external clamping or insertion installation, without the need to cut off pipelines, making them more convenient for dust collection. The segmented installation of sonar flow meters requires pipe cutting, which is more complicated. Ma
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