What kind of oil inside pressure gauge?

What kind of oil inside pressure gauge?

- Published in: blog

The oil inside a pressure gauge serves as a damping mechanism to minimize pointer oscillations caused by pressure fluctuations. This oil is often referred to as damping or fill fluid. The choice of oil depends on the application and the environmental conditions the pressure gauge will be exposed to. Some common types of fill fluids include:

  1. Mineral Oil:

    • Mineral oil is a commonly used fill fluid in pressure gauges. It provides good damping characteristics and is suitable for a wide range of applications.
  2. Silicone Oil:

    • Silicone oil is resistant to a broader range of temperatures compared to mineral oil. It is often chosen for applications where temperature extremes are a concern.
  3. Glycerin:

    • Glycerin, a type of glycerol, is sometimes used as a fill fluid. It is known for its low volatility and ability to withstand temperature variations.
  4. Halocarbon Oil:

    • Halocarbon oils, such as fluorinated hydrocarbons, are used in pressure gauges when resistance to chemical exposure is required.
  5. Dowtherm:

    • Dowtherm is a heat transfer fluid that may be used in pressure gauges intended for high-temperature applications.

The specific oil used will depend on factors like the temperature range of the application, the type of fluid being measured, and any chemical compatibility considerations. It's crucial to follow the manufacturer's recommendations for the fill fluid and ensure that the chosen oil is compatible with the conditions in which the pressure gauge will be used.

If you have a specific pressure gauge in mind, you should refer to the manufacturer's documentation or contact the manufacturer directly to obtain information on the recommended fill fluid for that particular gauge model.