dP, or differential pressure, refers to the difference in pressure between two points in a system. It is commonly used in various fields, including engineering and fluid dynamics, to assess the performance of equipment like pumps and filters. Measuring dP helps identify issues such as blockages or leaks, ensuring systems operate efficiently. In practical applications, dP is often measured using devices like manometers or pressure sensors. These instruments provide critical data that can inform maintenance decisions and optimize processes in industries such as oil and gas, HVAC, and water treatment. Understanding dP is essential for maintaining system integrity and performance.