How does a gas station fuel dispenser work?

A gas station fuel dispenser works by using a pump to draw fuel from underground storage tanks and deliver it to vehicles through a nozzle. When a customer activates the dispenser, a meter measures the amount of fuel dispensed while a series of valves control the flow of fuel. The dispenser typically includes safety features, such as automatic shut-off mechanisms and vapor recovery systems to minimize emissions. Payment systems are integrated to process transactions electronically before fueling begins.