What principle do differential pressure meters operate on?

Differential pressure meters operate on the principle of measuring the difference in pressure between two points within a system. This difference in pressure is essential for determining the flow rate of a fluid, such as air or refrigerant in HVAC applications.

The operation relies on the relationship defined by the Bernoulli theorem and the application of fluid dynamics, which states that the flow rate is proportional to the square root of the pressure differential. By accurately capturing this pressure difference, the differential pressure meter can calculate the flow rate, allowing for effective monitoring and control of HVAC systems.

Understanding this principle is crucial, as it differentiates differential pressure meters from other measuring devices such as thermocouples or humidity meters, which serve entirely different functions within HVAC applications.