What height are the Smartscan Hydra heads mounted? Technical Support February 23, 2019 07:46 Follow 1.4m - 1.45m (to the nozzle). Related articles Which clauses of BS8458 are applicable to Smartscan Hydra? How is Hydra different from the previous Automist Smartscan system? Comments 0 comments Please sign in to leave a comment.