The specific segmentation of electromagnetic flowmeters in different application environments

High voltage electromagnetic flowmeters are commonly used in applications where the measurement of electrically conductive fluids is required. These flowmeters operate based on Faraday’s law of electromagnetic induction and are suitable for a variety of industrial processes. Here are some key application characteristics of high voltage electromagnetic flowmeters:

Another important requirement of the electromagnetic flowmeter: how to accurately select the lining material, the lining material of the electromagnetic flowmeter should be selected according to the erosion, wear and temperature of the measured medium.

1. The sensor structure of the electromagnetic flowmeter is simple, and there are no moving parts in the measuring tube, nor any throttling parts that hinder the flow of fluid. So when the fluid through the flow timing will not cause any additional pressure loss, electromagnetic flowmeter is a very low energy consumption flow meter.

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
Output Signal: 4-20mA/Pulse

Electromagnetic flowmeter in use, we need to pay attention to what? Today for you to do a simple description, I hope you pay attention to the following points about the maintenance of electromagnetic flowmeters:

Dealing with a weak signal issue in an intelligent electromagnetic flowmeter is crucial to ensure accurate and reliable flow measurements. Weak signals can be caused by various factors, and addressing them requires a systematic troubleshooting approach. Here are some steps to help you diagnose and resolve the weak signal phenomenon:

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.

We all know that electromagnetic flowmeters can measure all conductive liquids, so their applications are very extensive. However, when it comes to some special liquids, it is still inevitable to be questioned whether they can be used or not. For example, today’s topic: Can silver nitrate solution be measured by an electromagnetic flowmeter? Let’s have a chat about this topic.

Drainage flowmeter, sewage outfall flowmeter installation position

1, the role of the electromagnetic flowmeter grounding ring: the grounding ring is directly in contact with the medium through the grounding electrode, and then the grounding ring is grounded with the flange of the electromagnetic flowmeter to achieve equal potential with the ground to eliminate interference.

Electromagnetic flowmeters generally operate normally for a long time without maintenance after installation, and then require maintenance and daily inspection. The electromagnetic flowmeter can not receive the signal or the signal is too weak is a small problem. So there is no surprise, carefully do the following steps can be solved.

The electromagnetic flow meter consists of a non-conductive pipe lined with a conductive material, typically made of metal. The meter contains coils or electrodes positioned opposite each other on the pipe’s inner walls. A magnetic field is then generated by passing a current through these coils, creating a measurable voltage across the fluid. The induced voltage, or EMF, is directly proportional to the fluid’s velocity, allowing the flow meter to accurately determine the flow rate. Importantly, this principle remains effective regardless of the fluid’s conductivity, making electromagnetic flow meters suitable for a wide range of applications, including water, wastewater, and various industrial processes.

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?

Electromagnetic flowmeters, also known as magmeters, are devices that measure the flow of electrically conductive fluids using the principles of electromagnetic induction. There are several types of electromagnetic flowmeters, each with its own characteristics and applications. Here are some common types:

From which aspects can one tell whether the quality of the purchased electromagnetic flowmeter is good or bad?

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 flowmeters are employed in HVAC (heating, ventilation, and air conditioning) systems to measure the flow of water or other fluids used for temperature control. The precision and reliability of these flowmeters ensure optimal performance of HVAC systems, leading to energy savings and improved comfort in various buildings and facilities.

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)

A type electromagnetic flowmeter does not require a separate converter; The separation electromagnetic flowmeter type converter is installed near the sensor or the instrument room, the place to choose is larger, the environmental conditions are better than the sensor, and the protection level is IP65 or IP64 (dust and splash level).

There are two ways to produce bubble-like gas in liquid, which are inhaled gas from the outside or dissolved gas in the medium is transformed into a free bubble.

After being used for a period of time, electromagnetic flowmeters sometimes experience lining deformation, which can lead to inaccurate measurements or sensor damage. Lining deformation mostly occurs in fluoroplastic linings. The common causes are generally two types:

Electromagnetic flowmeters, also known as magmeters, are devices that measure the flow of electrically conductive fluids using the principles of electromagnetic induction. There are several types of electromagnetic flowmeters, each with its own characteristics and applications. Here are some common types:

Usually there is more or less a mixture in the fluid in the measurement of some occasions. In general, in the presence of a small bubbling flow of oil and gas bubbles, it is still able to work normally, but the measurement is a fusion of the volume of oil bubbles, if the proportion of oil and gas rises to have caused a projectile flow, then the electrode may be covered by gas, resulting in the circuit is disconnected, the output shake is more likely to be directly damaged.

Electromagnetic flowmeter in the use process will produce some faults affect the normal work of the instrument, how to find the cause behind the fault is a very important work, we need to identify through a variety of different types of detection methods, in general, we for electromagnetic flowmeter routine testing, usually including electrode contact resistance, electrode polarization voltage, Signal cable interference, the determination of whether there is a grounding potential and the flow of stray current in the pipeline five aspects, these five aspects can be carried out separately, in fact, but also interrelated, any change in the factor may cause other changes, this reminds everyone in the detection of special attention:

The scale of the water supply system itself is huge, and the environment in which it is located is complex and changeable, requiring the electromagnetic flowmeter to have strong stability and reliability, so in the actual use process, the matters needing attention should be clear.

Electromagnetic flowmeters find versatile applications across various industries due to their precision and reliability in measuring fluid flow. One primary area of application is in water and wastewater management, where these flowmeters excel in accurately measuring the flow of water and other conductive fluids. Municipalities and water treatment plants utilize electromagnetic flowmeters to monitor water distribution networks, optimize usage, and ensure efficient wastewater processing.

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

Typical fault diagnosis and treatment of electromagnetic flowmeter

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:

1. The role of the electromagnetic flowmeter grounding ring: the grounding ring is directly in contact with the medium through the grounding electrode, and then grounded with the flange of the electromagnetic flowmeter through the grounding ring to achieve equal potential with the ground to eliminate interference.

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:

Advantages and disadvantages of electromagnetic flowmeter