differential pressure

This term is a technical compound noun used primarily in fluid dynamics, mechanical engineering, and industrial instrumentation. It describes a specific measurement of the pressure drop across a component, such as a filter or a heat exchanger, to determine the state of the system or the level of contamination.

In professional contexts, it is often abbreviated as DP. Because it refers to a specific physical measurement or a calculated value, it is treated as an uncountable noun in technical documentation, focusing on the concept of the pressure difference rather than individual instances of pressure.