The Acewell fuel sender installs into your fuel tank from the top. The included waterproof seal will prevent any fuel leakage.
The tank will read 'Empty' when the float is at full extension, 128mm from the top of the tank.
The tank will read 'Full' when the float is 40mm from the top of the fuel sender.
At full extension the top of the float will be 155mm from the top of the sender, however, the float position can be adjusted to suit the shape of your tank by bending the float arm.