Advantages:

Direct Reading: Provides a clear, direct view of the liquid level.

Simple and Reliable: No external power source needed; minimal maintenance.

Versatile: Can be used with a variety of liquids and under different conditions.

Disadvantages:

Fragility: Glass can break, which may lead to leaks or require shutdowns for replacement.

Limited Range: Suitable for certain pressure and temperature ranges; not ideal for extremely high pressures or temperatures.

Maintenance and Safety:

Regular Inspections: Check for cracks, leaks, and wear.

Proper Installation: Ensure correct fitting to prevent leaks.

Protective Shields: Use guards or shields to protect the glass from accidental impact.