When dealing with conductive liquids that carry impurities, selecting the appropriate flow meter is crucial for accurate measurement. This article explores the suitability of electromagnetic flow meters for such applications and delves into their principles, advantages, and applications.

Choosing the Right Flow Meter for Impure Conductive Liquids

    For liquids with suspended solids or impurities, the choice of flow meter must consider the potential for obstruction or wear. While rotor flow meters may be considered, there's a risk of the impurities causing the float to get stuck. Electromagnetic flow meters offer a robust alternative for measuring conductive liquids, providing a wide measurement range, high precision, and unique design benefits that include durability and low maintenance costs.

How Do Electromagnetic Flow Meters Work?

    Electromagnetic flow meters operate based on Faraday's law of electromagnetic induction, measuring the volume flow rate of conductive liquids and slurries in closed pipes. They consist of two main components: the electromagnetic flow sensor and the converter.

• Sensor Operation: When a conductive liquid flows through a non-magnetic measuring tube in a direction perpendicular to the magnetic field, an electromotive force (EMF) proportional to the flow velocity is induced. This generates a signal voltage at the electrodes, which can be used to calculate the flow rate.

• Converter Operation: The converter amplifies and converts the flow signal for processing. It can display flow and total volume and output signals such as pulses or analog currents.

Advantages of Electromagnetic Flow Meters

    These meters are designed to measure the flow of conductive liquids with an electrical conductivity greater than 5μS/cm. They are not only suitable for general conductive liquids but also for strongly corrosive liquids like strong acids and alkalis, and liquids with uniform solid-liquid suspensions, such as mud, mineral slurry, and paper pulp.

Key Features Include:

• A backlit, wide-temperature Chinese LCD display for intuitive operation and readability.

• No need for a ground ring, simplifying installation and maintenance.

• The ability to output a 4-20 mA current signal for recording, regulation, and control.

• Wide applications in industries like chemical, environmental protection, metallurgy, pharmaceuticals, papermaking, and water supply and drainage.

Applications and Benefits

    Electromagnetic flow meters are known for their excellent sealing performance, making them suitable for potable water and sewer systems. The non-contact measurement process is ideal for the pharmaceutical, biochemical, and food industries. With a high measurement accuracy that can reach a 0.5-grade level, these meters ensure reliable flow monitoring.

Manufacturing and Quality Assurance

    When crafting electromagnetic flow meters, attention to detail in design, material selection, process planning, assembly, and testing is paramount. Advanced calibration equipment and dedicated production facilities ensure consistent high-quality products.

    Electromagnetic flow meters stand out as a high-precision, reliable, and long-lasting solution for measuring conductive liquids with impurities. Their versatility and durability make them an ideal choice for a wide range of industrial and technical management applications.