This service, which also belongs to the Central Store, consists in checking the compliance of the self-rescue masks used by the personnel who moves in the tunnel. An annual review is done for each mask and after five years of use a complete rehabilitation is planned (brought into conformity, change of joints…). All the self-rescue masks are listed in a system and the convocations are made automatically.

However the self-rescue masks bought outside the Central Store are not supported by CERN, the user will have to contact the supplier directly.