The role of oil in oil-filled pressure gauges

The oil-filled pressure gauge is a common industrial measuring device that transmits and measures pressure by using liquid (usually oil). Oil plays a vital role in oil-filled pressure gauges. It is not only a medium for transmitting pressure, but also provides stability and accuracy. The role of oil in oil-filled pressure gauges will be described in detail below.

1. The working principle of oil-filled pressure gauges is based on the transmission mechanics of liquids
In oil-filled pressure gauges, oil is filled in the cavity between the measuring element (such as spring, diaphragm, etc.) and the pointer (or sensor). When the measured pressure acts on the measuring element, these elements will move slightly, causing the oil pressure to change accordingly. This pressure change is transmitted to the inside of the pressure gauge through the oil, and finally drives the pointer or sensor to display or record the pressure value.

2. Oil has high incompressibility and stability in oil-filled pressure gauges
Compared with gas or air, the incompressibility of oil makes pressure measurement more accurate and reliable. Even under extreme pressure conditions, oil can maintain its volume stability, thereby ensuring the accuracy and long-term stability of pressure measurement.

3. Oil can also play a role of lubrication and sealing during the operation of the pressure gauge
The oil in the oil-filled pressure gauge lubricates the moving parts of the measuring element, reducing errors or losses that may be caused by friction. At the same time, the oil can form an effective seal between the seals to prevent the external environment (such as dust, moisture, etc.) from entering the pressure gauge, thereby protecting the measuring element and the internal mechanical structure.

4. Oil can also help absorb and disperse pressure pulsation or shock
In some applications, sudden changes or fluctuations in pressure may interfere with or damage the measurement of the pressure gauge, and oil can act as a buffer medium to reduce this effect and ensure the stability and reliability of pressure measurement.

The role of oil in the oil-filled pressure gauge is not only to transmit pressure signals, but also has multiple functions such as high stability, incompressibility, lubrication, sealing and buffering. These characteristics make oil-filled pressure gauges widely used in industrial automation control, hydraulic system monitoring, aerospace and other fields, providing important guarantees for accurate pressure measurement and control. As a professional pressure gauge manufacturer,We sincerely invite your attention to take a look at our wide range of products.