Are Your Vacuum Gauges NIST calibrated? See Why It Matters The National Institute of Standards and Technology (NIST), is a measurement standards laboratory whose mission is to maintain the integrity and consistency of measurement standards in the US. NIST standards ensure consistency of measurement and are applied to digital vacuum instrumentation. Technical requirements are published in Handbook 44 that provides the “Specifications, tolerances, and other technical requirements for weighing and measuring devices”. Um, HELLO vacuum gauge manufacturers….take a listen here…. As a vacuum consumer, why is this important to you? You want to make sure that your vacuum gauge is consistent