Insertion type electromagnetic flowmeter is an instrument used to measure the volumetric flow rate of conductive fluids in pipelines. It is used to measure the flow rate of conductive fluids in various sectors such as tap water, steel, petroleum, chemical, power, industry, water conservancy, and water resources. It can also measure corrosive conductive liquids such as acids, alkalis, and salts.

Product features of insert type electromagnetic flowmeter:

1. Measurement is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity;
2. There are no obstructing flow components or pressure loss inside the measuring tube, and the requirements for straight pipe sections are relatively low;
3. Series nominal diameter DN15~DN3000. There are multiple options for sensor lining and electrode materials;
4. The converter adopts a new excitation method, which has low power consumption, stable zero point, and high accuracy. Flow range degree 1500:1;
5. The converter can be integrated or separated from the sensor;
6. The converter adopts a 16 bit high-performance microprocessor, 2×16 LCD display, convenient parameter setting, and reliable programming;
7. The flowmeter is a bidirectional measurement system equipped with three integrators: forward total, reverse total, and differential total; Can be displayed Positive and negative flow rates, with multiple outputs: current, pulse, digital communication HART;
8. The converter adopts surface mount technology (SMT) and has self checking and self diagnostic functions. The insert type electromagnetic flowmeter is composed of a insert type electromagnetic flow sensor (referred to as the sensor) and an electromagnetic flow converter (referred to as the converter). It is an instrument used to measure the volumetric flow rate of various conductive liquids inside pipelines.
9. Corrosion resistant all stainless steel material ABS full mold production probe structure is simple, firm, without moving parts, and has a long service life
10. Reliable measurement, strong anti-interference ability, small size, light weight, easy installation, and low maintenance; Large measurement range, unaffected by changes in temperature, density, pressure, viscosity, conductivity, etc;

Working principle of insert type electromagnetic flowmeter

According to Faraday’s principle of electromagnetic induction, a pair of detection electrodes are installed on the tube 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, it cuts the magnetic field lines and generates an induced potential. This induced potential is detected by the two detection electrodes, and the value is proportional to the flow rate. Its value is:
E=KBVD

In the formula:
E – Induced potential;
K – coefficient related to magnetic field distribution and axial length;
B – Magnetic induction intensity;
V – average flow velocity of conductive liquid;
D – electrode spacing; (Measuring the inner diameter of the tube)

The sensor uses the induced potential E as a flow signal, which is transmitted to the converter. After amplification, transformation, filtering, and a series of digital processing, the instantaneous and cumulative flow rates are displayed on a backlit dot matrix LCD. The converter has 4-20mA output, maximum output and frequency output, and is equipped with communication interfaces such as RS-485, and supports HART and MODBUS protocols.

Installation of insert type electromagnetic flowmeter

Installation of insert type electromagnetic flowmeter sensor: The upstream straight pipe section should not be less than 5D (D represents the pipe diameter), and the downstream straight pipe section should not be less than 2D:

1. Vertical installation, the sensor should be inserted into the pipeline at an angle of less than 5 ° to the vertical diameter of the pipeline section, suitable for measuring clean media with low pipeline vibration.
2. Tilted installation, with the axis of the sensor at a 45 ° angle to the axis of the measured pipeline, is suitable for measuring the flow rate of liquids with large diameters and other impurities in the measuring medium. This installation method has low water resistance and should not be tangled.
   There are two methods for inserting the insertion point of the electromagnetic flowmeter sensor: one is to insert it into the central axis of the measured pipeline (i.e. 1/2 of the pipe diameter); The second is to insert it into the inner wall of the pipeline at 1/4 of the pipeline.
   Installation of sensors:
3. Clean the welding slag and burrs on the installation base of the tested tube.
4. Close the upstream flow control valve or use low-pressure water supply.
5. Install the DN50 ball valve onto the installation base, paying attention to the long cavity of the ball valve facing upwards. Check if the ball valve can be fully opened or closed. Install the clamping thread seat, clamping nut, and rubber seal ring onto the ball valve, loosen the positioning nut, and insert the sensor into the measured pipeline through the ball valve. At the same time, pay attention to the direction of the sensor direction indicator rod, which should be consistent with the fluid flow direction. When placing an order, please specify the name of the tested medium, working pressure, medium temperature, flow rate (velocity) range, pipeline diameter, and the condition of the tested pipeline network.

Application scope of insert type electromagnetic flowmeter

The insert type electromagnetic flowmeter is easy to install, does not cut off flow, and can be opened with pressure on site. It has absolute installation advantages and is fully suitable for liquid flow detection with conductivity above 5us/cm, such as water, sewage, acid, strong alkali, etc. It has strong adaptability and is widely used in various industries in industrial production;
1、 Industrial production process
Flow meters are one of the major categories of instruments and devices in process automation. They are widely used in various fields of the national economy, such as metallurgy, power, coal, chemical, petroleum, transportation, construction, textiles, food, medicine, agriculture, and people’s daily lives. They are important tools for developing industrial and agricultural production, saving energy, improving product quality, enhancing economic efficiency and management level, and occupy an important position in the national economy. In process automation instruments and devices, flow meters have two main functions: as detection instruments for process automation control systems and as total quantity meters for measuring material quantities.
2、 Energy metering
Energy is divided into primary energy (coal, crude oil, coalbed methane, petroleum gas, and natural gas), secondary energy (electricity, coke, artificial gas, refined oil, liquefied petroleum gas, steam), and energy carrying working fluids (compressed air, oxygen, nitrogen, hydrogen, water), etc. Energy metering is an important means of scientifically managing energy, achieving energy conservation and consumption reduction, and improving economic efficiency. Flow meters are an important component of energy metering instruments. Commonly used energy sources such as water, artificial gas, natural gas, steam, and oil all use an extremely large number of flow meters, which are indispensable tools for energy management and economic accounting.
3、 Engineering
The discharge of flue gas, waste liquid, sewage, and other pollutants from insert type electromagnetic flow meters seriously pollutes the atmosphere and water resources, while orifice flow meters pose a serious threat to human health. Making sustainable development a national policy will be the biggest challenge of the 21st century. To control air and water pollution, it is necessary to strengthen management, and the basis of management is quantitative control of pollution levels. China is a country that relies mainly on coal as its energy source, with millions of chimneys continuously emitting smoke into the atmosphere. Smoke emission control is an important project to eradicate pollution, and each chimney must be equipped with smoke analysis instruments and flow meters to form a continuous emission system. The flow rate and volume of flue gas pose significant challenges, including large and irregular chimney sizes, variable gas composition, wide flow velocity ranges, dirt, dust, corrosion, high-temperature elliptical gear flow meters, and the absence of straight pipe sections.
4、 Transportation and Communications
There are five ways: rail transportation, air transportation, water transportation, and pipeline transportation. Although pipeline transportation has long existed, its application is not widespread. With the prominent environmental issues, the characteristics of pipeline transportation have attracted people’s attention. Pipeline transportation must be equipped with flow meters, which are the eyes of control, distribution, and scheduling, as well as essential tools for safety monitoring and economic accounting.
5、 Biotechnology
This century will usher in the era of intelligent vortex flowmeter supply for life sciences, and industries characterized by biotechnology will experience rapid development. There are many substances that need to be monitored and measured in biotechnology, such as blood, urine, etc. The difficulty of instrument development is extremely high, with a wide variety, and the market potential for insert type electromagnetic flow meters is enormous.