Patent ID: 7216537

Claim:
An optical liquid measuring device for determining the amount of flammable liquid in a storage tank that also contains water and/or other contaminant liquids, the optical liquid measuring device comprising: a first float having a density that is greater than the flammable liquid but less than the water; a second float having a density that is less than the flammable liquid; means to convert the vertical displacement of the first and second floats inside the storage tank into digital signals; a CPU capable of receiving the digital signals; an optical connector for receiving the digital signals; fiber optic cables for transmitting the digital signals to the CPU; computing means for determining the amount of flammable liquid and water in the storage tank; and a telescoping brace having a bottom, wherein at least one of the second sprockets of the first or second pulley means is attached proximate to the bottom of the telescoping brace.