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This article was first published on September 12, 2022, and updated on February 19, 2025. Not every application will require the same level of pressure gauge accuracy. For instance, the pressure of a home water system does not necessarily need to be as precise as a medical sterilizer. However, over time, even the highest quality pressure instruments can become less accurate due to factors such as wear and tear, environmental conditions, and mechanical stress. This gradual decline in accuracy poses can lead to inefficiencies, safety risks, and compromised operations, making it critical to periodically calibrate your instruments to ensure they provide accurate readings. During my 13 years as a precision product leader at Ashcroft, I am often asked how calibration is done. Read this article to learn what is involved in pressure gauge calibration and the instruments you can use to ensure it is done correctly. At the end of the article, you will also see links to additional resources to help deepen your knowledge on this subject and more.