How does a digital petrol pump works?

Question

How does a digital petrol pump works?

Answer 1

Turning on the machine starts a pump. A valve in the handle where it goes in the car allows fuel to flow when you squeeze it. Before the fuel goes into the black hose, it goes through an accurate flow sensor, a machine that measures how much fuel goes through. A small computer inside the machine monitors the flow sensor, and keeps track of how much petrol is pumped, and outputs the amount of petrol and cost to the display.