The ASTM D7091-22 standard specifies operational specifications for nondestructive measurement of dry-film thickness for nonmagnetic coatings for ferrous metals and nonmagnetic and nonconductive coatings for non-ferrous metals. The primary purpose of this standard is to ensure the accuracy and repeatability of Coating thickness measurements to meet the specification requirements of commercial and industrial coatings projects. The standard details the steps for calibrating, verifying, and adjusting Coating thickness measurements, as well as the correct method for making measurements on different substrates. Accurate measurement of Coating thickness is essential to ensure the performance and durability of Coating systems, and helps meet Coating Manufacturer and Project Specifications for Coating thickness. This standard applies to measurements using magnetic and eddy current meters and provides operational recommendations and reporting requirements to ensure the validity and Reliability of test results.