Are there any modifications or ad on to a star ship to increase sensor range?

None yet. Easily done on your own if you (or your GM) are so inclined.

It's worth stating that the mods listed in the books are not inclusive, collaboration between player and gm can give rise to new mod

10 hours ago, Tanis Frey said:

Are there any modifications or ad on to a star ship to increase sensor range?

Easy enough to create one, though we may not be used to doing that.

I saw one Boosted Sensor Mod someone create, about 500-600cr, 1 Hard Point, Boosts sensors one range category. I think that is reasonable.

Upgraded Comms array, Its in the core for AOR. Pg 239 Of said core says Comm range is usually equal to ships sensors So that is what I have always used for upgrading the sensor range.