Walk-through metal detectors used in passenger screening at airports shall fulfil the following requirements: (a) Security (i) equipment shall be capable of detecting small items of different metals, with a higher sensitivity for ferrous metals in all foreseeable conditions; (ii) equipment shall be capable of detecting metal objects independently of their orientation and location inside the frame; (iii) the sensitivity of the equipment shall be as uniform as possible inside the whole frame and should remain stable and be checked periodically.
