What does a Manometer measure?

• A. Temperature variations
• B. Flow rate adjustments
• C. Difference in pressure
• D. Humidity levels

Answer: (C)

A manometer is an instrument specifically designed to measure the difference in pressure between two points. This pressure measurement is typically displayed in units such as millimeters of mercury (mmHg) or pascals (Pa). Manometers are used in various applications, including HVAC systems, laboratory experiments, and industrial processes, to ensure that pressure levels remain within desired ranges.

The primary function of a manometer is to determine whether one point in a system is at a higher or lower pressure compared to another, which can help in diagnosing system performance or ensuring safety measures are met. It typically operates on the principle that the height of a liquid column in a tube will change in response to pressure differences, making it a direct and practical tool for pressure measurement.