Maximum Sensor Range?

Question. I had a really bright idea. I took a huge hull class, pasted a whole bunch of sensors on it, and then built it. The whole idea was to use this device essentially as a floating sensor platform which would monitor space all across the length of my galactic empire. According to the Shipyard, the sensor ship should have a detection radius of over 50 parsecs. However, when I actually build the ship, the info panel says that it has a range of 15 parsecs, and indeed that appears to be the distance my sensors are detecting. Does the game impose a maximum limit on sensor radius? 10:35, 14 Jan 2008