How does a gas pump know when the fuel tank is full?

BrainStuff

English - January 20, 2010 17:36 - 1 minute - 1.87 MB - ★★★★ - 1.6K ratings
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If you've ever put gas in a car, you've probably noticed how the gas pump shuts off when your tank is full. But how does it know to do that? Learn more about the clever mechanism that keeps your gas tank from overflowing in this episode of BrainStuff.

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