DN125 Electromagnetic flowmeter

Basic parameters

• 1. Nominal diameter: DN125 (can be customized).

• 2. Measuring range: wide, applicable to a variety of conductive liquids, flow rate range is usually 0.1-15m/s.

• 3. Conductivity range: the measured fluid conductivity ≥ 5μS/cm.

• 4. Accuracy class: pipeline type is generally 0.5 or 1.0 class.

• 5. Working pressure: up to 4.0MPa depending on specifications (customizable).

• 6. Working temperature: varies from -20℃ to +180℃ depending on the lining material.
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Measuring principle

DN125 electromagnetic flowmeter works based on Faraday's law of electromagnetic induction. When the conductive liquid in the magnetic field for cutting the magnetic line of force movement, will produce an induced potential in the conductor. This induced potential is proportional to the average flow rate of the liquid, through the measurement of this induced potential, you can calculate the volume flow of the liquid. The formula is expressed as: E = KBVD, where E is the induced potential, K is the instrument constant, B is the magnetic induction strength, V is the average flow rate, D is the pipe cross-section diameter.

Application scenario

It is widely used in petroleum, chemical industry, metallurgy, light textile, paper making, environmental protection, food and other industrial sectors, as well as municipal management, water conservancy construction, river dredging and other fields.

Specification

• Connection: Flange connection is adopted between flowmeter and piping, which conforms to GB standard.

• Protection class: IP65, special order up to IP68.

• Power supply: AC220V or DC24V, ultra-low EMI switching power supply, applicable to a wide range of power supply voltage changes.

• Accuracy: Measurement errors typically range from ±0.5% to ±1.0%.

• Repeatability error: ±0.1% of the measured value.

• Signal output: 4～20mA, pulse/frequency, support RS485, MODBUS, HART and other communication protocols.

• Laboratory calibration: Calibration using a standard flow device to ensure accurate measurements.

• Field calibration: Calibration by comparison with flow meters of known accuracy by the comparison method.

Applied value

• Industrial automation: real-time monitoring and control of fluid flow in production lines to improve productivity.

• Energy monitoring: In the oil, coal and other energy industries, flow rates are measured to optimize energy consumption and improve economic efficiency.

• Environmental protection: real-time monitoring of sewage flow, providing data support for environmental protection departments and helping environmental governance.

Installation Precautions

• Ensure that the length of straight pipe section at the installation location of the flowmeter meets the requirements (upstream ≥ 5DN, downstream ≥ 2DN).

• Check that there are no impurities in the piping to avoid clogging the meter.

• Ensure that the flowmeter is connected to the pipe flange tightly and without leakage.

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Debugging Precautions

• Follow the instructions for electrical connections and communication settings.

• Performs zero calibration and range setting to ensure accurate measurements.

Maintenance Precautions

• Periodically check the meter's appearance and connections to ensure there are no leaks.

• Clean the inside of the electrode and measuring tube to avoid dirt affecting the measurement.

• Periodically check cables and communication interfaces to ensure proper signal transmission.