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How gas pumps know when to turn themselves off

• yccs27 4y ago
  [video]
  • mhb 4y ago
    Doesn't youtube.com reveal that?
• pestatije 4y ago
  For the non-video explanation >A mechanical valve in the pump handle detects a change of pressure and closes, preventing the flow of fuel [Wikipedia] https://en.wikipedia.org/wiki/Gasoline_pump#Automatic_cut-off https://en.wikipedia.org/wiki/Gasoline_pump#Automatic_cut-of...