Slurry-type electromagnetic flowmeter

In slurry, sludge, and mineral pulp transport pipelines across industries such as mining, metallurgy, wastewater treatment, and papermaking, conventional flow meters often fail due to wear, corrosion, and electrode fouling. Henan Zhongce Sensor Manufacturing Co., Ltd. has introduced a slurry‑type electromagnetic flowmeter that, specifically addressing these operating conditions, features enhanced sensor materials and advanced converter technology to deliver a reliable and stable measurement solution.

I. Dual‑layer composite lining selection to address various wear scenarios
To address wear issues arising from varying particle concentrations and erosion intensities, this series offers two high-performance lining solutions:

F46 lining (fluorinated ethylene propylene): Exhibits excellent chemical resistance and temperature resistance, along with moderate wear and corrosion resistance, making it suitable for composite service conditions that involve both chemical corrosion risks and the presence of fine particulates.

Polyurethane lining (PUR): Offers excellent wear resistance, with toughness and elasticity that effectively absorb the impact energy of solid particles. For highly abrasive media containing high sand content, abundant fibers, or elevated sludge concentrations, polyurethane linings help extend the service life of the measuring tube.

II. A specially designed pointed electrode that reduces dielectric adhesion.
Fibers, oils, and viscous substances in the slurry readily adhere to the electrode tip, leading to insulation failure or signal fluctuations. To address this issue, the electrode has been optimized in both material and geometry:

Electrode materials can be selected from tungsten carbide coating or Hastelloy C. Tungsten carbide‑coated electrodes feature a highly hard surface and exhibit excellent wear resistance under the erosive action of flowing sand‑laden particles, making them well suited for non‑corrosive, high‑solids slurry applications. Hastelloy C electrodes combine outstanding wear resistance with superior resistance to a wide range of chemical media, making them ideal for scenarios—such as return sludge in wastewater treatment plants or chloride‑containing chemical slurries—where both abrasive wear and corrosive attack are present.

The pointed‑electrode design, featuring a hydrodynamically optimized tip geometry, reduces the surface area available for fiber and floc entanglement. By leveraging the medium’s inherent flushing action, the electrode tip remains relatively clean, thereby helping to maintain long‑term measurement stability.

III. Slurry-type dedicated converter, high-frequency excitation with anti-interference capability
Slurry‑type media, due to uneven distribution of solid particles, entrained gas bubbles, and electrochemical noise, often cause severe fluctuations in readings. A dedicated converter enhances signal stability by:

Compared with conventional power‑frequency excitation, high‑frequency excitation enables faster alternating switching of the magnetic field, yielding higher‑density flow‑signal samples and providing ample processing headroom for noise suppression. An intelligent digital filtering algorithm identifies and attenuates the low‑frequency, high‑amplitude noise characteristic of slurries, delivering stable flow readings without significantly increasing response latency, thereby ensuring precise control in dosing, batching, and other process steps. At both the circuit‑design and software levels, the transmitter has been enhanced for electromagnetic compatibility, effectively mitigating common‑mode and differential‑mode interference generated by on‑site variable‑frequency drives and high‑power pumping equipment.

IV. Key Points for Product Application
This series of slurry-type electromagnetic flowmeters is recommended for measuring the volumetric flow rate of highly abrasive, easily fouling, conductive liquid–solid two-phase media. When selecting a model, it is advisable to consider the medium’s pH, temperature, solids content, and particle size to determine the appropriate liner and electrode configuration. During installation, ensure compliance with straight‑pipe requirements, and prioritize full‑pipe flow in vertical or slightly inclined piping sections.

Henan Zhongce is equipped with calibration systems and testing equipment, ensuring that every slurry-type electromagnetic flowmeter undergoes rigorous testing before leaving the factory. We can assist in precisely matching the liner and electrodes to suit your specific operating conditions. For technical support or to request a detailed specification sheet, please contact our technical team at 0374-8098777.