involving a closed chamber above the liquid level, the chamber being exhausted or housing low-pressure gas; Liquid barometers

Full Title

Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements > using liquid as the pressure-sensitive medium, e.g. liquid-column gauges > involving a closed chamber above the liquid level, the chamber being exhausted or housing low-pressure gas; Liquid barometers

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE