Option number 1 - Kill the sentries. It's my favorite since you get XP.
Option number 2 - Try to get trough the top part to the left side where there is a locked door. Lockpick it and go inside, then go through the left side down... You might need to save scum in order to avoid detection.
Option number 3 - Try to find the omnitool. If i'm not mistaken there is one in level 2. Not sure which room.
You should still go with option 1. Robots are a bit tough but so long as you don't fight them in front of a camera you should be able to kill one at a time... Buy grenades if needed be. If you are a psionic, the electricity spell works like a charm. If you use a crossbow, shockbolts are also your best friend.