A flat-tube evaporator and a refrigeration system including a flat-tube evaporator. Tension means are situated upstream of the closing station, to cooperate with the rollers of the closing station, to perform a selected tension on at least the first band. The reference block 12 is used in order to give a reference position for measuring the surface position of the pad 2a. At least part of the substantially line-shaped electrodes is provided on the end surface of the board.