Please note also that monitor brightness plays an important role. I suggest that before getting annoyed when your crew signals a ship you can't see, you increase monitor brightness and double check. The only situation where you can say that sensors worked bad is if the ship is not rendered on screen. If it is, the problem lies in your brightness settings. The opposite is true, if you can see ships that your crew can't, reduce brightness until it becomes invisible.
It is impossible to produce sensor ranges that work for every monitor and user's setting out there, hence some cooperation from the player is needed for the best experience
