Electromagnetic flowmeter features in water treatment applications - Database & Sql Blog Articles

Characteristics and requirements of electromagnetic flowmeters in water treatment applications:
The electromagnetic flowmeter is not affected by external factors such as temperature, pressure, viscosity, etc., and there is no pressure loss caused by shrinkage or protruding part inside the measuring tube. In addition, the initial signal detected by the flow element is an accurate linearity with the average flow velocity of the fluid. The varying voltage, which has nothing to do with other properties of the fluid, has great advantages. According to the characteristics of large flow, large impurity, low corrosivity and certain conductivity, the electromagnetic flowmeter is a good choice for measuring the flow rate of sewage. It is compact and small in size. Easy to install, operate and maintain, the measuring system adopts intelligent design, the overall sealing is strengthened, and it can work normally in harsh environments. The vortex flowmeter is difficult to enlarge due to technical reasons. The quality and quality of the pipeline type ultrasonic flowmeter lack competitive advantage over the electromagnetic. Therefore, in the water and sewage industry, electromagnetic flowmeters, especially large-caliber electromagnetic flowmeters, have great advantages and have been widely used.
The electromagnetic flowmeter is powerful and easy to operate. The specific features are as follows:
1. Measure the unobstructed flow parts in the pipeline, no pressure loss, and the bottom of the straight pipe section.
2. Measurement is not affected by changes in fluid density, viscosity, pressure, temperature, and conductivity.
3, the lining has a variety of materials such as hard rubber, polyurethane, PTFE, PFA.
4, the transmitter's DC power supply / AC power supply, four-wire / two-wire system, explosion-proof / non-explosion-proof, economic / standard type and other subdivision to meet your different needs.
5, photosensitive button, can be opened without cover operation; Chinese menu display, more convenient for domestic users.
6, quick set menu, guide to complete parameter settings, convenient and fast.
7, high measurement reliability, good repeatability, long-term maintenance-free. Range ratio up to 1000:1
8, provide current, frequency, pulse, Hart, and other output methods for selection.
9. Installation requirements The PROMAG series of electromagnetic flowmeters are available in IP67 (dust and water proof) or IP68 (dust and submersible). Large-caliber flowmeter sensors in sewage plants are mostly installed underground, so it is recommended to choose IP68 (dust-proof and anti-submersible).

Usually the electromagnetic flowmeter has all the following requirements for the installation site:
1. When measuring the mixed phase fluid, choose the place that will not cause phase separation; when measuring the two-component liquid, avoid the downstream of the mixture that has not been uniformly mixed; when measuring the chemical reaction pipeline, it should be installed downstream of the fully completed reaction section; Meet the straight pipe segments before and after: not less than 5D and 2D;
2. Try to avoid the negative pressure inside the measuring tube;
3. Choose a place with small vibration, especially for integrated instruments;
4. Avoid large motors and large transformers nearby to avoid electromagnetic field interference;
5. It is easy to realize the place where the sensor is grounded separately;
6. Avoid high concentrations of corrosive gases in the surrounding environment as much as possible;
7, as far as possible to avoid direct sunlight