Which pressure measurement device is used to determine a fluid's pressure drop across a system component?

The Bourdon tube is a pressure measurement device commonly used to determine pressure within a system and can effectively assess the pressure drop across system components. It operates by utilizing the mechanical deformation of a curved tube when subjected to internal pressure. As pressure increases, the tube straightens, and this movement is transmitted to a dial or gauge that provides a direct reading of the pressure.

When it comes to measuring pressure drops specifically, the Bourdon tube is advantageous due to its sensitivity to changes in pressure. It can indicate both positive pressures and provide a means to gauge differences, making it suitable for applications where monitoring the pressure across components like valves, filters, and heat exchangers is essential. Understanding the pressure drop in these contexts is critical for system efficiency and performance.

Other instruments such as vortex meters, capillary tubes, and flow meters are designed for different functionalities. Vortex meters primarily measure flow rates rather than direct pressure. Capillary tubes may act as restrictors but are not generally used for pressure measurement. Flow meters focus on determining volumetric or mass flow rates, not pressure differentials. Hence, for measuring pressure drop specifically, the Bourdon tube stands out as the most appropriate device.