Measurement is the basis of commerce between producers, royalty owners, transporters, process plants, marketers, state and federal government authorities, and the general public. In fact, accurate measurement of hydrocarbon fluids and materials has a significant impact on the Gross National Product of exporting and importing countries, the financial performance and asset base of global companies, and the perceived efficiency of operating facilities. The need for accurate fiscal measurement is obvious. This information-packed volume covers all aspects of natural gas measurement and provides a clear presentation of the measurement principles, state-of-the-art technology, and its applications in the real world.