High-pressure electromagnetic flowmeter

Introduction to High-Pressure Electromagnetic Flow Meters

Product Overview

A high-pressure electromagnetic flowmeter is a precision instrument specifically designed to measure the flow rate of conductive liquids in high-pressure pipelines. Based on Faraday’s law of electromagnetic induction, it accurately determines fluid velocity and flow rate by measuring the induced electromotive force generated as the fluid cuts across magnetic field lines. Thanks to its unique structural design and material selection, it can operate reliably in the demanding high-pressure environments typical of industries such as oil and gas, chemical processing, metallurgy, and hydropower. It serves as a core device for achieving accurate measurement, process control, and energy management of high-pressure fluids.

Key Features and Advantages

Excellent high-voltage tolerance

Thickened pipe walls and reinforced structure : The measuring tube and housing are specially thickened and reinforced to withstand extremely high internal pressures. Common pressure ratings include PN10, PN16, PN25, PN40, PN64, PN100, and even higher (e.g., ANSI 150# to 2500#).

High-pressure special flange : High-pressure flanges made of high-strength materials and featuring a special sealing structure ensure secure connections under high pressure, with no leakage.

No flow-obstructing components, resulting in minimal pressure loss.

The measuring tube features a smooth, even inner wall with no moving or flow‑obstructing components (such as turbines or gears), resulting in virtually no pressure loss as the fluid passes through. This delivers significant energy savings and is particularly well suited for high‑velocity, high‑flow, high‑pressure delivery systems.

High measurement accuracy and excellent stability.

Full-bore design ensures that measurement results are unaffected by variations in fluid density, viscosity, temperature, or pressure.

Advanced excitation and signal-processing technologies effectively mitigate fluid‑induced electrochemical noise and power‑line interference, ensuring high measurement accuracy—typically up to ±0.5%, and in some cases even ±0.2%—as well as long-term stability.

Wide range of applicable media

As long as the conductivity of the liquid being measured exceeds a certain threshold (typically ≥5 μS/cm), measurement is possible. It is suitable for a wide range of conductive liquids, including water, wastewater, acids, bases, salt solutions, and slurries.

Strong wear resistance and corrosion resistance

For abrasive (such as mineral slurry or coal slurry) and corrosive (such as acids or alkalis) media commonly encountered in high-pressure environments, the following options may be selected: F46, PFA, ceramic lining materials, as well as Hastelloy, titanium, tantalum Electrode materials that provide exceptional protection.

Bidirectional measurement capability

The instrument’s output is independent of the flow direction, enabling easy measurement of both forward and reverse flow and meeting the requirements of specialized process applications.

Powerful intelligent features

Air Traffic Control Detection and Alarm : Automatically detects whether the pipeline is filled with liquid and outputs an alarm signal.

Multiple Outputs and Communications It supports 4–20 mA analog output, pulse output, and alarm contacts, and comes standard with fieldbus protocols such as HART, PROFIBUS‑DP, and MODBUS, facilitating seamless integration into DCS/PLC systems.

LCD display and button operation It displays real-time flow rate, cumulative flow, pressure, alarm information, and more, and allows for parameter configuration.