The intelligent electromagnetic flowmeter consists of two parts: a sensor and a converter. It operates based on Faraday's law of electromagnetic induction and is used to measure the volumetric flow of conductive liquids with conductivity greater than5μS/cm. It is an inductive instrument for measuring the volumetric flow of conductive media. In addition to measuring the volumetric flow of general conductive liquids, it can also be used to measure the volumetric flow of highly corrosive liquids such as strong acids and alkalis, as well as uniformly mixed liquid-solid two-phase suspensions such as slurry, ore pulp, and paper pulp. It is widely used in flow measurement in industries such as petroleum, chemical, metallurgy, light textile, papermaking, environmental protection, and food, as well as in municipal administration, water conservancy construction, river dredging, and other fields.

II.Working Principle 

According to Faraday's principle of electromagnetic induction, a pair of detecting electrodes is installed on the pipe wall perpendicular to the measuring tube axis and the magnetic field lines. When the conductive liquid moves along the axis of the measuring tube, the conductive liquid cuts the magnetic field lines and generates an induced electromotive force. This induced electromotive force is detected by the two detecting electrodes, and its value is directly proportional to the flow rate. The value is:
   E=KBVD 
   Where:
   E– induced electromotive force;
   K– coefficient related to magnetic field distribution and axial length;
   B– magnetic induction intensity;
   V– average velocity of conductive liquid;
   D– distance between electrodes; (inner diameter of measuring tube)
   The sensor uses the induced electromotive forceEas the flow signal and transmits it to the converter. After amplification, conversion, filtering, and a series of digital processing steps, the instantaneous flow rate and accumulated flow are displayed on a backlit dot-matrix LCD. The converter has4～20mAoutput, alarm output, and frequency output, and is equipped with communication interfaces such asRS－485, and supportsHARTandMODBUSprotocols.

III.Instrument Features

Full digital processing, strong anti-interference capability, reliable measurement, high accuracy, and a flow measurement range of up to150:1;
Ultra-lowEMIswitching power supply, suitable for wide power supply voltage variations, with goodEMIresistance;
Adopts a16-bit embedded microprocessor, featuring fast computing speed and high accuracy. Programmable-frequency low-frequency rectangular wave excitation improves the stability of flow measurement and reduces power consumption;
UsesSMDcomponents and surface mount (SMT) technology for high circuit reliability;
There are no moving parts or flow-blocking parts inside the pipeline, resulting in almost no additional pressure loss during measurement;
The range can be modified online on site according to actual user needs;
The measurement results are independent of physical parameters such as flow distribution, fluid pressure, temperature, density, and viscosity;
High-clarity backlitLCDdisplay, full Chinese menu operation, easy to use, simple to operate, and easy to learn and understand;
Equipped with digital communication signal outputs such asRS485,RS232,HartandModbus; (optional)

With self-check and self-diagnosis functions;
Hourly totalization recording function, recording the total flow on an hourly basis, suitable for time-of-use metering systems (optional);
Internally equipped with three totalizers that can separately display forward cumulative flow, reverse cumulative flow, and differential cumulative flow. An internal power-off clock can record16power-off times. (optional);
 Infrared handheld operator,115KHZcommunication rate, remote non-contact operation of all converter functions (optional).

Since its establishment, Xi'an Shenghongchuang Instrument Co., Ltd. has mainly been engaged in the R&D and production of pressure, level, temperature, differential pressure, digital display, weighing, and flow instruments.Main products include Swissmetallux ceramic piezoresistive sensors, and self-developed ceramic capacitive pressure sensors. Diffused silicon, ceramic piezoresistive, strain gauge, metal capacitive, ceramic capacitive pressure transmitters, remote pressure transmitters, high-temperature pressure transmitters, flush diaphragm pressure transmitters, anti-corrosion pressure transmitters, integrated/split level transmitters, anti-corrosion level transmitters, lightning-protection level transmitters, high-temperature guided-pressure level transmitters, rigid stem level transmitters, flange level transmitters, air pressure transmitters, metal capacitive differential pressure transmitters, diffused silicon differential pressure transmitters, pressure controllers, thermocouples/RTDs, temperature transmitters, and ultrasonic level meters

Notes 1.All supplied products are provided with product certificates and instruction manuals, including product number, technical parameters, wiring, factory date, etc. Please carefully check them to avoid misuse.2.Wiring should be carried out strictly in accordance with our company's instructions for use.3.This product is a precision instrument. Random disassembly, collision, dropping, or probing the sensor with sharp tools is prohibited.4.The transmitter can work immediately after power-on, but the output becomes stable after a 30-minute warm-up.5.If any abnormality is found during use, turn off the power, stop using it, and inspect it, or contact our company's technical department directly.6.During transportation and storage, restore the original packaging and store it in a cool, dry, and ventilated warehouse.7.The quality warranty period is 12 months (damage caused by improper use such as pressure overload or incorrect wiring is not covered by the quality warranty).8.Special products are customized products, are not eligible for 7-day no-reason return, have a customization lead time, and are non-returnable and non-exchangeable.