A gas pump will shut off when the tank is full; we've always taken that for granted. It's a fine feature that keeps gas from spilling all over us. But how does it know? The mechanism is a low-tech yet surprisingly complicated system. It's easy to understand the way Brain Stuff explains it in this video, but later on when you try to explain it to someone else, you'll end up just showing them this video. -via Geeks Are Sexy
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I have been accused of exactly that.
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Sometimes the system is annoying and keeps shutting off no matter how you position the nozzle.
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Oh, I thought it simply sensed the dwindling funds I have left in my wallet and shut off the gas before I ran out of money ;)
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