A Coating Thickness Reference Sample is a standard calibration tool used to check the accuracy and performance of coating thickness gauges. It consists of certified samples with a precisely measured layer of coating applied on a substrate, allowing users to verify instrument readings with confidence. These reference samples play a vital role in industries such as automotive, aerospace, and manufacturing, where correct coating thickness is essential for product quality, durability, and corrosion resistance. By using coating thickness reference samples, companies can maintain compliance with international standards, improve quality control, and ensure that their gauges provide reliable and consistent results for every application.