A device for sealing a container door are configured for the sake of a container security in such a way that the device for sealing a container door is installed at a locking device of a container door so as to detect if the container door is forcibly opened or closed by an unauthorized person during a container transportation from a freight-loaded place to a freight-unloaded place, and a result of such a detection is wirelessly transmitted to a container security system. The device for sealing a container door includes a main body, a locking member, a fixing unit, a stopper unit, a seal-release authentication unit, a holding unit, a seal-sensing unit, a LED state display unit, a battery, and a control board.

The protector includes a box-like metal housing formed of first and second housing parts connected by a spring-loaded hinge for movement between an open position, in which a seal associated with the vehicle cargo compartment door handle is exposed, and a closed position, in which the seal cannot be accessed. At least one of the housing parts is hollow and configured to accommodate the handle such that when the housing parts are in the closed position the seal is fully enclosed. A padlock may be used to lock the housing parts in the closed position such that the seal cannot be accidentally broken falsely indicating that the cargo compartment door has been opened during transit.

The protector includes a box-like metal housing formed of first and second housing parts connected by a spring-loaded hinge for movement between an open position, in which a seal associated with the vehicle cargo compartment door handle is exposed, and a closed position, in which the seal cannot be accessed. At least one of the housing parts is hollow and configured to accommodate the handle such that when the housing parts are in the closed position the seal is fully enclosed. A padlock may be used to lock the housing parts in the closed position such that the seal cannot be accidentally broken falsely indicating that the cargo compartment door has been opened during transit.