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Introduction Flow measurement is a foundational aspect of process control and instrumentation in industrial systems. Accurate flow data is essential for balancing inputs and outputs, ensuring efficiency, maintaining safety, and optimising production. Whether you're transferring hydrocarbons in oil and gas, monitoring feedwater in a power station, or controlling chemical dosing in a manufacturing plant, understanding flow measurement technologies is indispensable. This module provides a comprehensive overview of key flow measurement techniques, including their operating principles, selection criteria, installation practices, and use cases across manufacturing, power, energy, oil & gas, and nuclear sectors. Section 1: Principles of Flow Measurement There are several principles and methods for measuring the flow of liquids, gases, and steam. Each method operates based on specific physical phenomena and is suited to different applications. 1.1 Differential Pressure (DP) Flow Measurement DP flow meters infer flow rate from the...