Stealth Armor: Unbalanced

[Q]

In SE III I always felt that cloaking was unbalanced stong. You had absolutely no possibility to see a cloaked ship. The only thing you could do was to prevent a ship entering a sector, where you had a tachyon scanner. Even minefields could be swept by cloaked minesweepers.
I believe every cloaking should be in principle be defeatable with the only execption may be of the mines. But I agree it should be harder to do: more different sensors needed; sensors that work only in a limited range and not for the entire system.