Intelligent electromagnetic flowmeters are gaining traction in the market, driven by their unique advantages and growing demand. However, as the number of flowmeters increases, the market is facing significant challenges on multiple fronts. Despite this, the technology's inherent strengths ensure a stable position in the industry. These flowmeters have no moving parts, offer unobstructed fluid flow, and require minimal maintenance, making them highly efficient and cost-effective.
New growth opportunities are emerging in mixed industries such as food and beverage, pharmaceuticals, and others, where precision and reliability are crucial. Additionally, increasing environmental regulations are driving demand for flow totalizers in clean water and wastewater treatment applications. On the downside, the existing manufacturing capacity is often overextended, and there is a lack of sufficient capital investment in new technologies.
Industries like chemical, paper, and mining are currently experiencing slow growth, further limiting the expansion of electromagnetic flowmeter adoption. Economic conditions remain sluggish, which hinders overall market development. To ensure reliable operation, improve measurement accuracy, and prevent interference from external parasitic potentials, proper wiring is essential. The grounding wire should not be connected to common grounding systems used for motors or other equipment.
Under normal circumstances, metal pipes are self-grounded. However, if the pipe is coated with an insulating layer or made of non-metallic material, a grounding ring must be installed on both sides of the flowmeter. In areas with strong electromagnetic interference, especially when stray currents from power lines are present, a dedicated grounding system is required. This typically involves burying a copper rod or angle iron at least 0.5 meters deep in a moist area and connecting it with copper wires that have a combined cross-sectional area of more than 4 mm².
For non-metallic pipelines, a digital filtering system using high-precision imported components, such as the Philips LPC2132 dual CPU, is employed. In the excitation field, a dual-frequency excitation technique is used, offering strong anti-interference capabilities. Signal acquisition involves a three-electrode system that balances the electromotive force using a grounded electrode and liquid contact, preventing signal instability caused by improper grounding. Multi-layer shielding is also implemented to reduce noise and spikes effectively.
By analyzing the media characteristics and process environment, users can select the most suitable model, enhancing the flowmeter’s resistance to interference. The main components of the electromagnetic flowmeter sensor include the measuring tube, excitation coil, electrodes, core, and housing. Based on its measurement principle, the electromagnetic flowmeter is designed to measure the volumetric flow of conductive liquids and slurries in closed pipelines, such as acids, alkalis, and salts—substances that are highly corrosive and challenging to handle.
These devices are well-suited for harsh environments and are known for their high stability and precision. As a result, they are widely used in the chemical, water supply, and wastewater treatment industries, and have gained popularity among users. Companies like Nanjing Ruipai Instrument Co., Ltd. continue to innovate and provide reliable solutions for industrial flow measurement. For more information, visit their website or check the latest updates on the DCS system. For news and updates, visit http://news.chinawj.com.cn.
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