HVAC Metering Devices Practice Test

The role of a differential pressure sensor in an HVAC system is primarily to measure the pressure drop across various components, such as filters or coils. This measurement is crucial because it helps determine the efficiency and performance of the equipment. When air or fluid passes through a filter or coil, there is usually a variation in pressure due to resistance created by the medium. By measuring the differential pressure, the system can indicate how clogged a filter may be or how well a coil is functioning. This information is key to maintaining optimal airflow, ensuring energy efficiency, and prolonging the lifespan of components in the HVAC system.

Understanding pressure drops also allows for timely maintenance and adjustments that can prevent more significant issues, such as reduced system efficiency or potential failures. Therefore, selecting the measurement of pressure drop across filters or coils highlights the critical function of the differential pressure sensor in monitoring and maintaining system performance.