Electromagnetic flow meter one type and part type correct selection

Electromagnetic flowmeter in the use of precautions and installation requirements

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.

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.

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

In the electromagnetic flowmeter installation and debugging stage there will be some failures, below, we will understand the specific causes of the failure at this stage and their elimination methods.

Size: DN15mm-DN200mm
Nominal Pressure: 1.6Mpa
Accuracy: ±0.5%(Standard)
Liner: FEP, PFA
Output Signal: 4-20mA pulse frequency relay

According to different working conditions, split electromagnetic flowmeters can be divided into the following types:

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:

We have introduced a lot of relevant information about electromagnetic flowmeters before, and today we mainly introduce several typical installation errors to help you avoid these problems.

In industry, electromagnetic flowmeter is a kind of flow meter with a wide range of uses. Electromagnetic flowmeter is divided into: one type, sub-type, insert type. Different occasions need to choose different electromagnetic flowmeters to ensure the measurement results.

The measuring principle of intelligent electromagnetic flowmeter is Faraday’s law of electromagnetic induction, which measures the flow of conductive fluid according to the electromotive force induced by the conductive fluid through the external magnetic field. The main components of the sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell.

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.

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)

Once the installation location is determined, the next step is preparing the piping system. Ensure that the pipeline is clean and free from debris that could interfere with the operation of the flowmeter. In some cases, straight pipe runs are recommended both upstream and downstream of the flowmeter to allow for proper fluid flow development and stabilization. This helps in achieving optimal measurement accuracy.

The electromagnetic flowmeter should be installed with the flow direction aligned with the arrow on the flowmeter body. Proper orientation ensures that the magnetic field generated by the flowmeter’s coils is perpendicular to the fluid flow, allowing for accurate measurements. Additionally, it is essential to properly ground the flowmeter to minimize electrical noise and interference, ensuring the stability of the measurement signals.

The installation process involves securely mounting the flowmeter on the piping system using appropriate brackets or supports. Care should be taken to align the flowmeter properly and tighten all connections to prevent leaks. Adequate sealing measures must be implemented to prevent ingress of moisture or contaminants into the flowmeter, which could adversely affect its performance.

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.

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

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 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:

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.

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.

When using electromagnetic flowmeters in the field, it’s important to perform regular checks and maintenance to ensure accurate and reliable flow measurements. Here are some key parameters to check and consider in the field for electromagnetic flowmeter use:

Drainage flowmeter, sewage outfall flowmeter installation position

The installation distance between an electromagnetic flowmeter and a control valve, especially a rear valve, is a critical factor that can impact the accuracy and reliability of flow measurements. Here are some general guidelines to help determine the appropriate installation distance:

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.

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

The transducer in the split electromagnetic flowmeter can form a body or separate type with the sensor, the integrated electromagnetic flowmeter is the integrated electromagnetic flowmeter, the split type becomes the split electromagnetic flowmeter, the flowmeter is a two-way measurement system, and the three integrators are installed: the forward total, the reverse total and the difference total; Can be displayed. And has a variety of outputs: current, pulse, digital communication, HART, taking split electromagnetic flowmeter as an example to introduce what problems should be paid attention to when installing:

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.

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:

In addition to signal analysis, real-time monitoring is a crucial aspect of fault diagnosis for electromagnetic flow meters. Continuous assessment of key parameters, such as fluid conductivity and temperature, can help detect anomalies that may impact meter accuracy. For instance, sudden changes in conductivity might signal issues like fluid contamination or changes in fluid composition, prompting the need for further investigation.

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.