Digital displayer for vehicle fuel tank

A vehicle tank digital display of the invention comprises a control circuit, a mechanic transmission section mounted in the tank, a digital display mounted in a driving room; the mechanic transmission section comprises a horizontal fix plate and a lower fix plate. Rotary screws and fixed slide bars on the left and right sides are mounted vertically between two fix plates. A horizontal floater connecting plate is sleeved on the screw and the slide bars on the left and right sides via three throughholes. Two floaters on the left and right sides are fixed at bottom of the floater connecting plate. The floater connecting plate is provided with a nut sleeved on the screw. A rotary potentiometer is mounted at top of the screw. The control circuit comprises an adjusting circuit and an A/D conversion circuit. Effective benefits of the invention are that it is convenient to mount and maintain, simple in structure, low in cost and high in stability, which displays fuel charge and residual charge accurately and intuitiv