Patent ID: 8181515

Claim:
A fluid level indicator strip for a receptacle containing a volume of fluid within an impermeable liner, said receptacle comprising a bottom surface, four walls each having an inside surface, a top surface, an outside surface, a top end and a bottom end and a removable top, wherein said fluid level indicator strip comprises a flexible thin impermeable elongate strip having: a. a vertically disposed first part housing a predetermined number of spaced apart fluid level sensors disposed in a column within the receptacle between said wall inside surface and said impermeable liner so that said volume of fluid is not in contact with said fluid level indicator; b. a vertically disposed second part housing a predetermined number of visual fluid level displays disposed on said wall outside surface opposite said first part; c. a third part connecting said first part to said second part disposed horizontally on said top surface; and, d. a power source connected to the fluid level indicator strip.