Sewage less than pipe flow meter | Portable Doppler ultrasonic flow meter for drainage outlet monitoring and channel monitoring

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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. How to choose a non full tube electromagnetic flowmeter? How to install? Electromagnetic flow meters are widely used in various fields such as sewage, fluorine chemical industry, production water, tap water industry, as well as pharmaceuticals, steel and many others. Due to its principle, it can only measure conductive liquids. When placing an order, it is not advisable to order according to the original pipe diameter. It is better to determine the instrument diameter based on your actual flow rate. Like other flow meters, electromagnetic flow meters also have requirements for straight pipelines before and after installation, with only lower requirements than other types of flow meters. Although electromagnetic flow meters have good reliability and are generally not damaged, due to their principle, the sensor electrode surface is always in contact with the liquid, and over time, the electrode surface is more susceptible to contamination. Therefore, in general, for electromagnetic flowmeters, if customers have the conditions to disassemble them, it is recommended to remove and clean the electrodes once every one to one and a half years to ensure the measurement a

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