What is the primary function of a bubbler system?

The primary function of a bubbler system is to measure head pressure, specifically in liquid level measurement applications. A bubbler system operates by injecting air or gas through a submerged tube open to the atmosphere, creating bubbles that rise through the liquid. The pressure of the gas at the exit of the tube corresponds to the hydrostatic pressure exerted by the liquid column above the outlet. As the liquid level changes, the head pressure changes accordingly, allowing for accurate level measurement.

In contrast, other measurement functions listed, such as specific gravity, magnetism, and conductance, do not align with the operational principles of a bubbler system. Specific gravity measurement typically involves determining the density of a liquid relative to water, which requires a different method. Magnetism measurement pertains to magnetic field properties, while conductance measurement involves electrical conductivity, often assessed using techniques unrelated to gas pressure and liquid levels.