To ensure the operation of the electromagnetic flowmeter, the following points must not be ignored

The water flowmeter is a measuring instrument widely used in industries, agriculture, civil applications and other fields. It can accurately measure the flow velocity and volume of water flow and provide relevant data according to the user’s needs. When using a water flow meter, we often hear a term – range.

Electromagnetic water meters offer several advantages in water measurement applications, particularly in industrial and municipal settings. Here are some key advantages of electromagnetic water meters:

Advantages and disadvantages of electromagnetic flowmeter

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:

Calibration checks are another essential component of fault diagnosis for electromagnetic flow meters. Regular calibration against known standards ensures that the meter’s measurements remain accurate over time. Any deviation from the expected calibration values may indicate sensor degradation, electronic component failure, or other issues that require attention.

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).

Typical fault diagnosis and treatment of electromagnetic flowmeter

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.

Notes for electromagnetic flowmeter selection:

The shell protection level of the ordinary electromagnetic flowmeter sensor is IP65 (the dustproof and anti-splash level stipulated by GB4208), and the requirements for the installation site are:

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.

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.

Suitability of electromagnetic flowmeters in chlor-alkali measurement chlor-alkali occupation measurement of brine and caustic soda, both of which have the same characteristics:

Electromagnetic flowmeter is a speed meter to measure the volume flow of conductive media. While carrying out on-site monitoring and display, it can output standard current signals for recording, adjustment and control, realizing automatic control of detection, and realizing long-distance transmission of signals. It can be widely used in water, chemical, coal, environmental protection, textile, metallurgy, paper and other industries in the flow measurement of conductive liquid. The structure of the instrument has one type and one type.

Performance Technical parameter
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

When measuring waste acid using an electromagnetic flowmeter, it’s crucial to choose electrodes that are suitable for the corrosive nature of the acid and that can withstand the specific conditions of the application. Common electrode materials for electromagnetic flowmeters used in corrosive environments include:

Electromagnetic flowmeters exhibit remarkable performance even in challenging environmental conditions. Their construction materials are often chosen for their corrosion resistance, enabling these devices to withstand harsh chemicals and extreme temperatures. This robustness ensures continuous and reliable operation, making electromagnetic flowmeters suitable for demanding industrial applications where other flow measurement devices might struggle to perform consistently.

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

Electromagnetic flow meters, also known as magmeters, are advanced devices used for measuring the flow rate of conductive fluids such as water and slurries. These meters operate based on the principles of electromagnetic induction. A magnetic field is generated by the meter’s coils, and as the conductive fluid flows through the meter’s pipe, it generates a voltage proportional to the flow rate. The strength of this induced voltage is directly correlated with the speed of the fluid, allowing for accurate and reliable flow measurements.

The intelligent electromagnetic flowmeter is mainly used to measure the volume flow of conductive liquids and slurries in closed pipelines, including strongly corrosive liquids such as acids, alkalis and salts.

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 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.

Electromagnetic flowmeters exhibit remarkable performance even in challenging environmental conditions. Their construction materials are often chosen for their corrosion resistance, enabling these devices to withstand harsh chemicals and extreme temperatures. This robustness ensures continuous and reliable operation, making electromagnetic flowmeters suitable for demanding industrial applications where other flow measurement devices might struggle to perform consistently.

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

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.

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.

Precision and flow rate of electromagnetic flow meter

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:

The electromagnetic flowmeter is constructed in such a way that it mainly consists of a number of key components that work together to measure the flow of a conductive liquid. The following is the main structure of the electromagnetic flowmeter and its functions:

Electromagnetic flowmeter, with high precision, long life characteristics, in chemical industry, environmental protection, metallurgy and other fields and industries have been applied.

Electromagnetic flowmeter is composed of two parts: sensor and converter. It is based on Faraday’s law of electromagnetic induction work, used to measure the conductivity of more than 20μS/cm conductive liquid volume flow, electromagnetic flowmeter is a measurement of conductive medium volume flow induction instrument.

In the metering industry, electromagnetic flowmeter is a basic metering tool, and its range of use is very wide. The emergence of electromagnetic flowmeters has made great contributions to many industries, and it occupies a very important position in these industries. Pay more attention when using the electromagnetic flowmeter, check it before use to see how accurate its measurement is. The calibration of electromagnetic flowmeter is mainly considered from the following aspects:

The requirements for the straight pipe sections before and after the electromagnetic flowmeter are crucial for ensuring the accuracy and stability of the measurement results. The following is a detailed analysis of the requirements for the straight pipe sections before and after the electromagnetic flowmeter: