New RS485 water electromagnetic flow meter

New RS485 milk beer drink water electromagnetic flow meter,Pipeline electromagnetic flow meter for sale,Hot water electromagnetic flow meter price,Oil plant electromagnetic flowmeter suppliers manufacturer

The measuring principle of electromagnetic flowmeter is Faraday's law of electromagnetic induction. The main components of the sensor are: measuring tube, electricity, excitation coil, iron core and yoke shell. It is mainly used to measure the volume flow of conductive liquid and slurry in closed pipelines. Including acid, alkali, salt and other highly corrosive liquids. The product is widely used in petroleum, chemical, metallurgical, textile, food, pharmaceutical, paper and other industries, as well as environmental protection, municipal management, water conservancy construction and other fields. The HH-LDE series electromagnetic flowmeter is a fully intelligent electromagnetic flowmeter developed using internal and external technology. Its full-Chinese electromagnetic converter core uses a fast central processing unit. The calculation speed is very fast, the accuracy and the measurement performance are reliable. The converter circuit design adopts international advanced technology, the input impedance is 1015 ohms, the common mode rejection ratio is better than 100db, and the rejection ability for external interference and 60Hz/50Hz interference is better than 90db, and it can measure the flow of fluid media with low conductivity. The sensor adopts non-uniform magnetic field technology and special magnetic circuit structure, the magnetic field is stable and reliable, and the volume is greatly reduced, the repetition is reduced, and the flow meter is small in size. It is the purpose of our company to make customers "buy with confidence, use with ease, and serve with satisfaction".
2. Product points: There are no moving parts in the pipeline, no flow-blocking parts, and almost no additional pressure loss during the measurement. The measurement result has nothing to do with the flow rate distribution, fluid pressure, temperature, density, viscosity and other physical parameters. The range can be modified online according to the actual needs of users on site. Clear backlit LCD display, full Chinese menu operation, easy to use, simple to operate, easy to learn and understand. Adopt SMD devices and surface mount (SMT circuit reliability).Adopt 16-bit embedded microprocessor, fast calculation speed, precision, programmable frequency low frequency rectangular wave excitation, improve the stability of current measurement, and low power consumption. All-digital processing, strong anti-interference ability, reliable measurement, precision, flow measurement range up to 150:1 Low EMI switching power supply, wide range of power supply voltage, good EMC resistance There are three internal totalizers that can respectively display the positive cumulative amount and the difference cumulative amount, and the internal non-power-off clock can record 16 power-off times With digital communication signal output such as RS485, RS232, Hart and Modbus.
Three, the working principle of electromagnetic flowmeter
The measurement principle of XY-LD series electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a short, non-magnetically conductive tube lined with edge material. The two electric devices are fixed on the measuring tube through the tube wall along the tube diameter direction. The electric head is basically flush with the inner surface of the lining. When the excitation coil is excited by both impulses, a working magnetic field with a magnetic flux density of B will be generated in the direction perpendicular to the axis of the measuring tube. At this time, if a fluid with constant conductivity flows through the measuring tube. The electromotive force E is induced by the cutting magnetic field lines. The electromotive force E is proportional to the magnetic flux density B, and the product of the inner diameter d of the measuring tube and the average flow velocity v is measured. The electromotive force E (flow signal) is detected by electricity and sent to the converter through the cable. After the converter amplifies the flow signal, it can display the fluid flow, and can output signals such as impulse and analog current for flow control and adjustment.
E=KBdv
In the formula: E--------------- is the signal voltage between electricity (v)
      B-----------------Magnetic flux density (T)
      d------------------Inner diameter of measuring tube (m)
      v------------------Average flow velocity (m/s)
In the formula, k and d are constants. Since the excitation current is constant, B is also constant. From E=KBdv, it can be seen that the volume flow Q is proportional to the signal voltage E-, that is, the signal voltage E induced by the flow rate is proportional to the volume Q Linear relationship. Therefore, as long as E is measured, the flow rate Q can be determined, which is the basic working principle of an electromagnetic flowmeter.
It can be seen from E=KBdv that the temperature, density, pressure, conductivity, liquid-solid composition ratio of the liquid-solid two-phase fluid medium and other parameters of the measured flow volume medium will not affect the measurement result. As long as the flow state conforms to the axisymmetric flow (such as laminar flow or turbulent flow), the measurement result will not be affected. Therefore, the electromagnetic flowmeter is a real volume flowmeter. For manufacturers and users, as long as they are actually calibrated with ordinary water, they can measure the volume flow of any other conductive fluid medium without any correction. This is the outstanding advantage of the electromagnetic flowmeter, which is not available in any other flowmeter. There are no moving and blocking parts in the measuring tube, so there is almost no pressure loss, and there is a reliable reliability.