i'd like to suggest some new(well to SK at least) possible puzzle elements, inspired by the myriad of stealth, and puzzle, games out there

so basically why not have sensor style trap/puzzle objects, that when tripped activate a defense system

my first few ideas for traps are the most basic,
the arc sensor, it has a limited field of view, reasonably short as well, and periodically sweeps over an area - knights have to run around or between the sensor sweeps, a corridor of these would present a possible challenge
Another is the spotlight style sensors, circles of light that travel slowly over an area, more suitable to large open areas then the arc sensors but still usable in corridors
my final idea is the eye guardian idea, similar to a lot of rpg/puzzle games, the 'eye' will not allow passage or will attack as long as it can see you(its immobile so you have to stand in front of it to be seen), the only way past is to hide behind an object or block its line of site - i've seen this used as an invisible barrier before, an alternative to the standard gates.

the triggered defense could simply be a spike floor or status traps covering the entire room/area, though i'd like to see some more elaborate defense systems, possibly lasers similar to the roar twins for corridor areas, or a series of rockets
generally id say no to spawning enemies on trigger unless they do not drop treasure(cr, heat, materials)

the other way to use them is as a stealth puzzle, a button at the beginning opens the gate, but get caught and the gate shuts and the button pops up again. repeat until your able to get through without being seen by the sensors

thoughts?