Most ASHRAE members may not be aware of ten basic measurement standards beginning with Standard 41.1, Standard for Temperature Measurement, and including 41.2 through 41.11 standards for measuring pressure, airflow, air velocity, humidity, gas flow, liquid flow, refrigerant flow, and power. This presenter describes the utility of each of these standards for application to product testing and for incorporating into other ASHRAE testing standards. Revised versions of all of these standards have been published since 2013 and are current and useful.