Which component is used to measure system pressure?

Which component is used to measure system pressure?

• A. Filters
• B. Manometer (correct)
• C. Accumulator
• D. Reservoir

Answer: (B)

Measuring system pressure relies on a device that responds directly to the force of the fluid. A manometer does this by balancing the hydraulic pressure against a column of liquid; the pressure pushes the liquid up or down so that the height difference in the fluid correlates to the pressure in the system (P = ρgh for a simple differential manometer). This makes the manometer a dedicated tool for reading pressure. Filters serve to remove contaminants, protect components, and do not measure pressure. An accumulator stores hydraulic energy and helps dampen pressure changes, not measure them. A reservoir holds fluid for storage, also not a measurement device. So, among the options, the manometer is the component used to measure system pressure.