Influence of liquid conductivity on electromagnetic flow meter measurement

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:

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:

Sewage treatment is one of the crucial links in modern urban life. In the process of sewage treatment, accurately measuring the sewage flow is the foundation for ensuring the efficient operation of the treatment system. Therefore, the measurement of sewage flow has become an indispensable part of the sewage treatment process.

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:

Sewage flowmeter is an induction meter used to measure the volume flow of conductive medium in pipes.

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

The role of electromagnetic flow meter grounding in actual installation. Compared with other flowmeter products, electromagnetic flowmeter has high precision, reliable performance, stable work and excellent anti-interference ability. However, as a precision instrument, in order to meet these high requirements, it is necessary to have strict installation requirements, this article will introduce the electromagnetic flowmeter grounding wire that is often not paid attention to when installing.

After the initial debugging and normal operation for a period of time, the split electromagnetic flowmeter fails in the operation process, the common causes of failure are: the internal flow sensor connection layer, lightning strikes, environmental changes. Below, the staff of the flowmeter manufacturer will lead you to understand some common faults of the split 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:

The use of electromagnetic flowmeters is very wide, and this measuring instrument is used in many industries. Electromagnetic flowmeter is different from the general flowmeter, it follows the principle of electromagnetic induction, can measure the flow of liquid in the pipeline and its velocity.

In the flow measurement of domestic sewage, it is very important to choose the right flowmeter to ensure the accuracy and reliability of the measurement results. Here are some suggestions to help you choose the right flowmeter for domestic sewage:

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:

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 flowmeter has become one of the flow meters for measuring media in chemical enterprises. As long as the liquid has a certain conductivity, the electromagnetic flowmeter can be used to stop the flow measurement.

In the flow measurement of domestic sewage, choosing the appropriate flowmeter is of vital importance to ensure the accuracy and reliability of the measurement results. Here are some suggestions to help you choose a flowmeter suitable for domestic sewage:

Electromagnetic flow meters operate based on a fundamental principle of electromagnetic induction, providing an accurate and reliable method for measuring the flow of conductive fluids. The working principle involves Faraday’s law of electromagnetic induction. As a conductive fluid flows through a pipe, it cuts across the magnetic field generated by coils or electrodes mounted on the flow meter. According to Faraday’s law, an electromotive force (EMF) is induced in the fluid perpendicular to both the magnetic field and the flow direction. The induced EMF is directly proportional to the flow velocity of the fluid.

Electromagnetic flowmeter in the use of precautions and installation requirements

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

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

One of the defining features of electromagnetic flowmeters is their exceptional precision and accuracy in measuring fluid flow rates. The utilization of Faraday’s law of electromagnetic induction ensures that the induced voltage is directly proportional to the flow rate of the conductive liquid passing through the magnetic field. This inherent accuracy makes electromagnetic flowmeters a go-to choice in applications where precise measurements are critical, such as in pharmaceutical manufacturing, chemical processing, and water treatment.

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

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.

Intelligent electromagnetic flowmeters are mainly used to measure the volume flow of conductive liquid and slurry in closed pipelines, including acid, alkali, salt and other highly corrosive liquids.

Basic fault treatment of intelligent sewage electromagnetic flowmeter:

The measurement principle of the electromagnetic flowmeter is Faraday’s law of electromagnetic induction. It is an instrument that measures the flow of conductive fluids based on the induced electromotive force when the conductive fluid passes through an external magnetic field.

Notes for electromagnetic flowmeter selection:

Electromagnetic flowmeter is designed for the measurement of conductive liquid instrument, its high accuracy, wide range ratio, internal no moving parts, open flow parts, no pressure loss. Excellent corrosion resistance, high pressure resistance, strong adaptability, has been widely used in various production fields. Because some installation sites are more complex, it is inevitable to produce a variety of interference, Aister instrument to explain several common electromagnetic flow meter anti-interference methods:

Electromagnetic flowmeters are mainly used to measure the volume flow of conductive liquid and slurry in closed pipelines, including the volume flow of acid, alkali, salt and other highly corrosive liquids.

The choice of water flow meter is a comprehensive consideration process, involving many aspects of factors. Here is a guide to tap water flow meter selection to help you choose the most suitable solution:

Electromagnetic flowmeter mainly has two kinds of pipe segment type and plug-in type, and is divided into two types of body type and sub-body type, of which the plug-in electromagnetic flowmeter is suitable for DN300 or more pipelines.

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.

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.