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Field instruments are essential components of industrial automation systems used to measure, monitor, and control key process variables such as flow, level, pressure, temperature, and chemical properties. These instruments convert real-time physical parameters into standardized electrical or digital signals like 4–20 mA, HART, or digital communication protocols, enabling seamless integration with PLC, SCADA, and DCS systems. They play a critical role in ensuring accurate process control, operational safety, efficiency, and product quality across various industries such as water treatment, oil & gas, chemicals, pharmaceuticals, food processing, and power plants.
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