The level of interest in effective and accurate gas sampling techniques is currently at a very high priority within the natural gas industry. With the fluctuating ranges in natural gas prices, exploration interests, profitability, deregulation and consolidation of the work force, recoverable revenue must be accounted for. At large volume delivery points, a 3-5 BTU error in energy determination can cost companies tens of thousands of dollars within a very short time period. Accurate sampling techniques must be implemented with equal interest as is given to accurate volume measurement. MMBTU is the total of volume and energy. Sampling is the energy determination delivery system for this equation.