Advantages and disadvantages of electromagnetic flow meter

Now, the input impedance of the electromagnetic flowmeter converter has improved a lot, and the error is basically not caused by changes in the conductivity of the medium when the conductive liquid is conductive, but for a certain converter input impedance, the conductivity of the measured medium has a lower limit min, which cannot be lower than this lower limit.

electromagnetic flowmeters have emerged as indispensable tools for industries that demand accurate and reliable flow measurements. Their advanced technology, coupled with the ability to operate in diverse environments and handle various conductive liquids, positions them as a preferred choice in applications ranging from water management to chemical processing. As technology continues to evolve, electromagnetic flowmeters are likely to witness further advancements, contributing to increased efficiency and precision in liquid flow measurement across different sectors.

Size: DN3-DN3000mm
Nominal Pressure: 0.6-1.6Mpa(2.5Mpa/4.0Mpa/6.4Mpa… Max 42Mpa)
Accuracy: +/-0.5%(Standard) +/-0.3% or +/-0.2%(Optional)
Liner: PTFE, Neoprene, Hard Rubber, EPDM, FEP, Polyurethane, PFA
Electrode: SUS316L, Hastelloy B, Hastelloy C Titanium, Tantalum, Platinium-iridium
Structure Type: Integral type, remote type, submersible type, ex-proof type
Medium Temperature: -20~+60 degC(Integral type)
Remote type ( Neoprene ,Hard Rubber ,Polyurethane ,EPDM) -10~+80degC
Remote type(PTFE/PFA/FEP) -10~+160degC
Ambient Temperature: -20~+60deg C
Ambient Humidity: 5-100%RH(relative humidity)
Measuring Range: Max 15m/s
Conductivity: >5us/cm
Protection Class: IP65(Standard); IP68(Optional for remote type)
Process Connection: Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional)
Output Signal: 4-20mA/Pulse
Communication: RS485(Standard), HART(Optional),GPRS/GSM (Optional)
Power Supply: AC220V (can be used for AC85-250V)
DC24V (can be used for DC20-36V)
DC12V (optional), Battery Powered 3.6V (optional)
Power Consumption: <20W Alarm: Upper Limit Alarm / Lower Limit Alarm Self-diagnosis: Empty Pipe Alarm, Exciting Alarm Explosion Proof: ATEX

Electromagnetic flowmeter is a kind of high precision, high reliability and long service life flow surface, which is composed of two parts: the sensor that directly contacts the pipeline medium and the upper end signal converter.

Measuring medium: Conductive liquid
Diameter range: DN3mm～DN3000mm
Accuracy: ± 0.5% of the indicated value, optional ± 0.3% or ± 0.2%
Measuring range (Flow rate): 0.01m/s～15m/s
Electromagnetic flow meter is one of the most popular flow meters. Flange type electromagnetic flow meter has been used for more than 50 years worldwide. It is widely used for all conductive liquids in every industry, such as water, acid, alkali, milk, slurry etc.

For the daily inspection of the electromagnetic flow meter, in addition to the inspection of the sensor we talked about last time, it is also necessary to check the sensor of the electromagnetic flow meter, connecting cables, etc., below we will understand how to operate.

Typical fault diagnosis and treatment of electromagnetic flowmeter

Electromagnetic flowmeters, also known as magmeters, are widely used in various industries for measuring the flow rate of conductive fluids. They operate based on Faraday’s law of electromagnetic induction, where a voltage is induced in a conductor (the fluid) as it moves through a magnetic field. These flowmeters are favored for their accuracy, reliability, and suitability for a wide range of applications. Here are different categories of electromagnetic flowmeters and their fields of application:

Selecting the appropriate installation point for an electromagnetic flowmeter is crucial for accurate and reliable measurements. Here are some considerations and guidelines to help you choose the right measuring installation point:

What fault will occur during the debugging period of the plug-in electromagnetic flowmeter, the split electromagnetic flowmeter and the initial debugging fault, but once the fault is improved, it will generally not occur again under the same conditions.

Drainage flowmeter, sewage outfall flowmeter installation position

According to the principle formula of the electromagnetic flowmeter, the induced signal potential is not affected by the change of conductivity and temperature, pressure, density and viscosity when the liquid conductivity is uniform. However, in the actual measurement, due to the following reasons, the electrical conductivity will also have some impact on the measurement.

Electromagnetic flowmeter is a kind of induction instrument to measure the volume flow of conductive medium in tubes. It has been used in many fields. It is popular for its intuitive display and convenient operation. Here is to introduce the electromagnetic flowmeter according to the use.

Electromagnetic flowmeter as a commonly used flow measurement instrument, the choice of its material is also an important factor. Because in the electromagnetic flowmeter, the part in contact with the medium is only the electrode and the inside of the measuring tube, it is necessary to select the correct electrode and lining material according to the characteristics of different media.

What are the requirements for the installation environment of the electromagnetic flow meter?

The installation of the electromagnetic flowmeter depends on the requirements of the customer’s working conditions, and then select the type, and install it according to the instructions or the guidance of the flowmeter manufacturer’s staff. The following points need to be noted when installing the electromagnetic flowmeter:

Due to various reasons, some large diameter flowmeters used online can not be tested off-line. It has become an urgent problem to study an online calibration method which is both scientific and effective and ADAPTS to the needs of the field. At present, there are three common methods for online calibration of electromagnetic flowmeters:

The installation direction of the electromagnetic flowmeter is not particularly strict requirements, generally horizontal, vertical or inclined can be unlimited. However, it must be reminded that in order to ensure that the pipeline is full of the measured medium, that is, the “full tube” state, it is recommended to install vertically, flow from bottom to bottom, especially for liquid-solid two-phase fluids, it must be installed vertically. If the site only allows horizontal installation, it must be ensured that the two electrodes are in the same horizontal plane, and the axis of the electrode must be approximately horizontal, because the electrode at the bottom is easily covered by sediment, and the top electricity is easily wiped by the occasional bubble in the liquid, covering the electrode surface and making the output signal fluctuate. The following lists the matters that need attention in the installation of electromagnetic flowmeters:

Electromagnetic flowmeter, with high precision, long life characteristics, in chemical industry, environmental protection, metallurgy and other fields and industries have been applied. However, in the process of use, due to the influence of many factors, it is easy to cause the inaccurate measurement results of the electromagnetic flowmeter. So what are the reasons for the error of the electromagnetic flowmeter?

The electrode is the main part of the electromagnetic flowmeter used to measure the liquid flow, therefore, the choice of normal electrode material is directly related to the accuracy of the measurement and the price of the electromagnetic flowmeter.

Electromagnetic flowmeters, also known as magmeters or magnetic flowmeters, are widely used for measuring the flow rate of conductive liquids in various industries. Several factors can influence the accuracy of electromagnetic flowmeters. Understanding and addressing these factors are essential to ensure precise and reliable flow measurements. Here are some key factors that can affect the accuracy of electromagnetic flowmeters:

Selecting the right electromagnetic flowmeter involves considering various factors to ensure it meets the specific requirements of your application. Here’s a step-by-step guide to help you choose an electromagnetic flowmeter:

For the pipeline supporting the electromagnetic flowmeter, the factors affecting the accuracy of the plug-in electromagnetic flowmeter are mainly the length of the straight pipe section and the inner diameter of the pipeline:

In the use of electromagnetic flowmeter measurement, we often have to consider how to deal with the problem of receiving no signal or signal is too weak, we should look for reasons from the following possible problems:

Electromagnetic flow meter is one of the most popular flow meters. Flange type electromagnetic flow meter has been used for more than 50 years worldwide. It is widely used for all conductive liquids in every industry, such as water, acid, alkali, milk, slurry etc.

Electromagnetic flowmeters generally operate normally for a long time without maintenance after installation, and then require maintenance and daily inspection.

Battery-powered electromagnetic flowmeter is a metering instrument designed for water supply enterprises, which can optimize water use and ensure accurate water measurement.

Electromagnetic flowmeters, also known as magmeters or magnetic flowmeters, typically generate electrical output signals proportional to the flow rate of a conductive fluid passing through a pipe. The most common output signals from electromagnetic flowmeters include:

Electromagnetic flow meters offer several advantages, making them a popular choice in various industrial applications. Here are some of the key advantages of electromagnetic flow meters:

With the continuous acceleration of industrialization, the problem of environmental pollution is becoming more and more serious, and the call of society for sustainable development is getting higher and higher, so the control of pollution is more urgent.

The reason why the measurement error is large is that the amount of oil and suspended matter in the water from the sewage station is high, and the treated sewage has a small amount of oil and suspended matter in the water, and the error of electromagnetic flowmeter measurement is also small.