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 than 5μS/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 uniform liquid-solid two-phase suspensions such as slurry, ore pulp, and paper pulp. It is widely used for flow measurement in petroleum, chemical, metallurgy, light textile, papermaking, environmental protection, food and other industrial sectors, 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 detection electrodes is installed on the pipe wall perpendicular to the axis of the measuring tube 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 detection electrodes, and its magnitude is directly proportional to the flow rate. Its 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 force E as the flow signal and transmits it to the converter. After amplification, conversion, filtering, and a series of digital processing, the instantaneous flow and cumulative flow are displayed on a backlit dot-matrix LCD. The converter has 4～20mA output, alarm output, and frequency output, and is equipped with communication interfaces such as RS－485, and supports HART and MODBUS protocols.

III.Instrument Features

Full digital processing, strong anti-interference capability, reliable measurement, high accuracy, and a flow measurement range up to 150：1;
Ultra-low EMI switching power supply, suitable for a wide range of power supply voltage variations, with excellent resistance to EMI;
Adopts a 16-bit embedded microprocessor with fast operation speed and high accuracy, and programmable low-frequency rectangular wave excitation,  improving the stability of flow measurement while reducing power consumption;
Uses SMD components and surface mount (SMT) technology for high circuit reliability;
There are no moving parts or flow-blocking components inside the pipeline, resulting in almost no additional pressure loss during measurement;
The measuring range can be modified online on site according to actual user requirements;
The measurement results are independent of physical parameters such as flow velocity distribution, fluid pressure, temperature, density, and viscosity;
High-definition backlit LCD display, full Chinese menu operation, convenient to use, simple to operate, and easy to learn and understand;
Provides digital communication signal outputs such as RS485, RS232, Hart, and Modbus; (optional)

With self-check and self-diagnosis functions;
Hourly total 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. It also has a non-power-loss clock inside and can record 16 power outage times. (optional);
 Infrared handheld operator, 115KHZ communication 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-proof level transmitters high-temperature guided-pressure liquid level transmitters rigid rod level transmitters flange level transmitters wind pressure transmitters metal capacitive differential pressure transmitters diffused silicon differential pressure transmitters pressure controllers thermocouples/RTDs temperature transmitters ultrasonic level gauges

Precautions 1.All supplied products are provided with a product certificate and instruction manual, including product number, technical parameters, wiring, factory date, etc. Please check them carefully to avoid incorrect use.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 will stabilize after 30 minutes of warm-up.5.If any abnormality is found during use, the power supply should be turned off, use should be stopped, and inspection should be carried out, or contact our company's technical department directly.6.During transportation and storage, the original packaging should be restored and the product should be stored in a cool, dry, and ventilated warehouse.7.The quality guarantee period is 12 months (damage caused by improper use such as pressure overload or incorrect wiring is not covered by the quality guarantee).8.Special products are customized products and do not participate in 7-day no-reason return. Customized products have a lead time and are non-returnable and non-exchangeable.