Liquid-Filled Pressure Gauges

1. These gauges are filled with a damping fluid—typically glycerin or silicone oil—that cushions internal components against shock.
2. This fluid reduces the impact of vibrations and pressure spikes, ensuring smoother needle movement.
3. They are ideal for demanding environments such as pumps, compressors, and engines, where consistent and accurate readings are vital.

Dry Pressure Gauges

1. These are the simplest form, with no fluid inside the casing.
2. They operate using mechanical movement to indicate pressure.
3. Dry gauges are lightweight, economical, and best suited for stable environments with minimal vibration or pulsation.