Metrology Glossary: Manometer

What Is A Manometer?

A manometer is an instrument used for gauging the pressure of a fluid. It typically consists of a U-shaped glass tube containing a liquid, such as mercury. One end of the tube is linked to the fluid under examination for pressure, while the opposite end remains open to the surrounding air. When the fluid’s pressure surpasses atmospheric pressure, it displaces the liquid within the U-shaped tube. The variation in liquid height between the two arms of the tube corresponds directly to the pressure disparity between the fluid and the atmosphere.

What Are Manometers Used For?

Manometers are widely used within multiple industrial settings. They are employed for measuring the pressure of various fluids, excelling in precision even for minute pressure differentials. Additionally, these instruments are crucial in determining vacuum levels, monitoring fluid flow systems by assessing pressure differences, and measuring filter pressure drops to evaluate filter efficiency. Manometers also play a pivotal role in calibrating other pressure gauges, detecting leaks in fluid systems, and measuring liquid levels in containers.