Liquid-filled pressure gauges provide a number of advantages:

1. The liquid absorbs vibration and pressure spikes

2. The dampening action of the liquid enables the operator to take readings during conditions of rapid dynamic loading and vibration.

3. The liquid lubricates all moving elements, dramatically reducing wear in the movement

4. Because most liquid-filled gauges are filled with non-aqueous liquid and hermetically sealed, they perform in corrosive environments and are immune to moisture penetration and icing, and shock effects are lessened.

Liquid-filled pressure gauges enhance the reliability and integrity of the measuring system for long periods under extreme operating conditions

The type of liquid used to fill the pressure gauge varies with the application. Although pure glycerine provides the best performance in most applications, each has its own requirements. If icing is a problem, use gauges filled with silicone oil or other comparable liquids. If the system has electric accessories such as contacts, use insulating oils, and if extreme temperature fluctuations are expected, use silicone oils. The higher the liquid viscosity, the greater it’s dampening capacity.