| 摘要 |
A forecourt fuel pump (10) has a casing in which are locating means for metering and delivering to a flexible hose liquid fuel to be dispensed, and also a processing unit arranged to monitor and control the delivery of fuel and the display of information concerning that delivery. The pump is provided with at least one sensor (18, 19, 20) for an environmental parameter associated with the pump, such as the sensing of the presence of aqueous or hydrocarbon liquids in the pump casing, the temperature within the casing or of the fuel being pumped. Further sensors (24, 25) external of the pump may be provided to sense other parameters such as the presence of hydrocarbon vapour or liquids or the temperature within a duct or other housing (26, 27) associated with the supply of fuel to the pump. The or each sensor provides an electrical output which is supplied to the processing unit of the pump (10) and the processing unit is arranged to monitor the electrical output and provide an indication if the sensed value falls outside a pre-set range. Depending upon the parameter, the processing unit may arrange to shut down the delivery of fuel.
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