| 摘要 |
A vapor recovery system (10) with density detector (58) for identifying the vapor composition of recovered vapor. The system (10) controls the operational rate of vapor collection when the recovered vapor is identified as substantially non-hydrocarbon. Density detection is achieved through correlating the speed by which sonic or acoustic energy traverses through the recovered vapor. The vapor composition is identified by comparing measured density of the vapor collected to known vapor densities.
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