An electro-optical detector is provided. The detector includes a mounting support adapted to be secured to a fixed structure and an alignable component which is connected to the mounting support through an adjustment mechanism capable of altering the relative position of the alignable component during commissioning of the detector. The detector further has a detachable controller unit including a communication module which receives instructions from a remote communication device in response to which the adjustment mechanism alters the alignable component's position relative to the mounting support.