What was found
AT FL350, RT INNER TANK FAULT ECAM. COMPLIED WITH ECAM AND QRH. 120# FUEL IN CTR TANK, INNER AND TRIM SHOWED 0 . RIGHT OUTER TANK STARTED TO DECREASE THROUGHOUT THE DESCENT GREATER THAN THE LEFT OUTER. DECLARED EMERGENCY AS IMBALANCE REACHED 800#. AT LANDING, FUEL IMBALANCE BETWEEN OUTER TANKS WAS 1100#. HAD THE CROSS FEED IN-LINE AND KEPT THE RIGHT THROTTLE AT IDLE AS LONG AS POSSIBLE UNTIL APPROACH AND LANDING. EMERGENCY DECLARED. FOUND RT INNER TANK LOW LEVEL SENSOR 698QJ READING WET WITH TANK EMPTY. REPLACED LOW LEVEL SENSOR IAW AMM 28-46-21-04. OPS CHECK GOOD. PERFORMED OPERATIONAL TEST - CENTER AND INNER-TANK PUMPS AUTOMATIC-CONTROL REF AMM 28-21-00-05-02. OPS CHECK GOOD.