Which flowmeter is appropriate for conductive media?

Conductive media (such as acids, alkalis, salt solutions, sewage, slurries, etc.) are best measured using ‌electromagnetic flowmeters‌, which operate based on Faraday's law of electromagnetic induction. The flow rate is calculated by measuring the electromotive force (EMF) generated when the conductive liquid cuts through magnetic field lines. Below is a detailed analysis:

‌Core Advantages of Electromagnetic Flowmeters‌

1. ‌Non-obstructive Design‌: The flow tube has no moving parts, resulting in almost zero pressure loss, making it ideal for media containing solid suspensions (e.g., mineral slurries, wastewater).

2. ‌High Precision & Corrosion Resistance‌: Accuracy can reach ±0.5%, and it accommodates highly corrosive media through lining materials (e.g., PTFE) and electrode materials (e.g., Hastelloy).

3. ‌Wide Applicability‌: Requires a conductivity of ≥5 μS/cm, covering applications such as water, chemical liquids, and food/pharmaceutical processes.

‌Limitations of Other Flowmeters‌

• ‌Vortex Flowmeters‌: Prone to signal distortion from particles.

• ‌Differential Pressure Flowmeters‌ (e.g., annubar, orifice plates): Pressure taps can easily clog with suspended solids, increasing maintenance costs.

• ‌Positive Displacement Flowmeters‌ (e.g., oval gear meters): Moving parts are prone to wear, making them unsuitable for particulate-laden fluids.

‌Selection Recommendations‌

• ‌Split-Type Electromagnetic Flowmeter‌: Suitable for high-temperature, highly corrosive, or remote-monitoring applications (e.g., chemical wastewater treatment).

• ‌Integral-Type Electromagnetic Flowmeter‌: Compact design, ideal for routine conductive liquid measurements (e.g., tap water, irrigation).

• ‌High-Precision Models‌: Such as  Nickel‌ NKGF series, designed for harsh industrial environments.

‌Conclusion‌: Electromagnetic flowmeters are the optimal solution for measuring conductive media, particularly in applications involving solid particles or corrosive liquids.

‌Note‌: The translation maintains technical accuracy while ensuring readability for an English-speaking audience. Let me know if you'd like any refinements!