How to quickly/safely/easily destroy a Detector Tower. Alternatives to the use of a Hellbomb/Portable Hellbomb.
Any red stratagem with enough demo force can destroy it:
Orbital Laser: Can destroy a Detector Tower although it won't target it. Your best bet is to throw it in such a way that it moves towards a fabricator/heavy enemy, destroying the Tower in its path.
SEAF Artillery: Can destroy a Detector Tower if the shell is one of the following:
Explosive
High-Yield Explosive
Mini-Nuke