What are the dimensions of the Hydra controller? Technical Support February 23, 2019 08:17 155mm height x 155mm width x 42mm depth Related articles What size is Smartscan Hydra head & face plate? How do you reset the Smartscan Hydra Controller? How to determine Automist Smartscan's suitability in BS 9991:2015 How do you specify the Fixed Wall Head? What electrical connection is required for Automist? Comments 0 comments Please sign in to leave a comment.