Fuel dispensing system with sensors for vapour flow and hydrocarbon concentration

摘要

A fuel dispensing system includes vapour flow and hydrocarbon concentration sensors 54 positioned in a vapour line, normally the vapour recovery line 34, to provide accurate feedback relating to the flow rate and concentration of hydrocarbon laden vapour recovered by a vapour recovery system. The sensors provide diagnostic information about the vapour recovery process as well as ensuring that the vapour recovery process is carried out in an efficient manner. The sensors may be positioned in an underground storage tank vent apparatus 42 to monitor fugitive emissions from the underground storage tank.