The present invention is a method and apparatus for monitoring in real time the mass and energy flow rate of a gas through a pipeline. The invention determines the mass flow ratio of a pipeline gas flowing through a pipeline compared to sample gas tapped from the pipeline line when the ...http://www.google.com/patents/USRE35639?utm_source=gb-gplus-sharePatent USRE35639 - Method and apparatus for measuring ratio of mass flow rates and energy flow in a gas pipeline 
