Pipeline electromagnetic flowmeter

The pipeline-type electromagnetic flowmeter manufactured by Henan Zhongce Sensor Manufacturing Co., Ltd. is designed for measuring the volumetric flow of conductive liquids and is widely used in water supply, wastewater treatment, HVAC systems, agricultural irrigation, and general industrial process control applications. With its stable performance and excellent versatility, this product meets the measurement requirements of most standard operating conditions.

I. Measurement Principle and Structural Features
This product series is based on Faraday’s law of electromagnetic induction and calculates flow rate by measuring the induced electromotive force generated when a fluid cuts magnetic field lines. The sensor consists primarily of a measuring tube, a liner, a pair of electrodes, and an excitation coil, while the converter handles signal processing and output. Structurally, it is available in two configurations: integral and split. The integral type features a compact installation and is suitable for environments with favorable site conditions. The split type separates the converter from the sensor, enabling flexible deployment in high‑temperature, humid, or space‑constrained locations.

II. Selection of Lining and Electrode Materials
To accommodate the characteristics of various media, a variety of material combinations are available for the lining and electrodes.

Lining material:
Neoprene is suitable for ordinary fresh water, raw water, and neutral solutions, and exhibits good abrasion resistance.
Polytetrafluoroethylene (PTFE) exhibits a broad temperature range and excellent chemical stability, making it suitable for corrosive media such as acids and bases.
F46 (fluorinated ethylene propylene) exhibits properties similar to polytetrafluoroethylene, offers excellent moldability, and is well suited for lining applications involving complex geometries.

Electrode material:
316L stainless steel is used for low-corrosion media such as potable water and industrial clean water.
Hastelloy B is suitable for non-oxidizing acid solutions, such as hydrochloric acid, at certain concentrations.
Hastelloy C is suitable for oxidizing acids, chloride-containing solutions, and mixed-acid environments.
Titanium is suitable for seawater, brine, and chloride solutions.
Tantalum is suitable for strong acids and highly corrosive media, exhibiting excellent chemical stability.

When selecting equipment, verify the material compatibility by referencing the material‑corrosion resistance chart, taking into account the medium’s chemical properties, temperature, and concentration.

III. Converter Function Configuration
The accompanying converter features the following functions:
Multiple output signals, including 4–20 mA analog, pulse, and frequency outputs.
The communication protocols supported include RS485, Modbus, HART, and others.
The air‑traffic‑control detection function promptly triggers an alarm when the pipeline is not fully filled.
Bidirectional flow measurement, suitable for pipelines requiring both forward and reverse metering.
The damping time is adjustable, making it easy to accommodate fluids with varying degrees of fluctuation.
Cumulative flow display and power‑off data retention function.

IV. Installation and Operating Conditions
During installation, ensure sufficient straight pipe lengths upstream and downstream of the sensor—typically at least 5 times the pipe diameter upstream and at least 2 times the pipe diameter downstream. Avoid mounting the sensor at the highest point of the pipeline to prevent air bubbles from accumulating. For horizontal installations, keep the electrode axis horizontal; for vertical installations, it is recommended that the fluid flow be from bottom to top. Provide independent grounding using a grounding ring or grounding electrode to eliminate stray current interference.

V. Scope of Application
This series of pipeline‑mounted electromagnetic flowmeters is suitable for liquids with a conductivity of at least 5 µS/cm. The operating temperature range depends on the lining material, while the pressure rating is determined by the flange standard and pipe diameter. The products can meet the flow‑measurement requirements of most industrial and municipal piping systems.

Henan Zhongce Sensor Manufacturing Co., Ltd. is equipped with flow‑calibration facilities and a factory‑acceptance testing process, ensuring that every product undergoes real‑flow calibration as well as insulation and dielectric‑strength tests. We can assist with material selection and installation‑solution validation based on your specific process media and installation requirements. For detailed specifications or assistance with product selection, please contact our Sales and Technical Services team at 19943999277.