Over the past 25 years the design of the Airflow Measurement Systems has evolved into its present form, always conforming to the original design parameters of being self contained, self calibrating, efficient and providing repeatable and accurate test results. As industry realized the flexibility, speed, and accuracy of the AF36, applications for its uses have grown. The AF36 is the only standard industrial machine being used in production-measuring areas from 0.265 to over 150 square inches. The AF36 will also flow in reverse allowing measurement of even the most unusual parts such as combustion liners, etc.