A Magnetic Flux Leakage (MFL) floor scanner, also known as an MFL tank bottom scanner or MFL tank floor scanner, is a specialized non-destructive testing (NDT) tool designed for inspecting the bottom surface of aboveground storage tanks, particularly those used for storing petroleum products, chemicals, or other liquids.

The primary purpose of an MFL floor scanner is to assess the integrity of the tank's bottom plate, identify corrosion, and locate any potential defects or anomalies that could compromise the structural integrity or leak containment of the tank.