Our
technician lowers an electronic probe & load cell into the tank
through the fill pipe.
The electronic probe
is suspended inside the tank and hangs from the load cell. The probe
actually floats in the liquid fuel inside the tank approximately 1''
from the tank bottom.
The electronic probe
and cell measure minute changes in mass of the liquid fuel inside the
tank. Measuring mass changes eliminates the need to correct for the
liquid fuel's temperature expansion and contraction.
Specifically, if water
enters the tank, the electronic probe rises. If liquid fuel leaks from
the tank, the probe falls. These changes in mass are instantly
recorded in a unit called a data logger.
The data logger
readings are transferred to a computer, which transforms the readings
into a graphic illustration of the integrity of the liquid fuel
portion of the tank.
