Patent ID: 7305875

Claim:
An apparatus for dynamically measuring a volume of fuel in a fuel tank, comprising: a fuel level sensor mounted on said fuel tank; a fuel meter configured to produce an electrical indication when a predetermined volume of fuel passes through said fuel meter; a rewritable memory for storing a look-up table, wherein said look-up table stores correspondences between volumes of fuel in said fuel tank and levels of fuel in said fuel tank; and a controller configured to receive outputs from said fuel level sensor and said fuel meter and convert the output from said fuel level sensor into a fuel volume by utilizing said look-up table, wherein when said controller detects said electrical indication from said fuel meter, said controller calculates a current level of fuel from said output from said fuel level sensor and calculates a current volume of fuel by decrementing/incrementing a previous volume of fuel by said predetermined volume of fuel, and said controller rewrites said look-up table with said calculated current volume of fuel corresponding to said current level of fuel, and wherein the controller further calculates heating degree days and oil consumption, and issues an alarm when a result of a comparison of said heating degree days and said oil consumption is outside a predetermined range.