The flow specktrometer is supposed to detect traps. Have you ever found it to work? I've briefly tested it out and it appears to do nothing. I ran around the BMC (with no detect trap ranks and lots of batteries in my inventory) and detected 0 traps. Also, if you ever got it to work, does it stop working when you run out of batteries? As far as I can tell from the script it simply tries to destroy a battery every X seconds, it doesn't actually check that you have a battery to begin with.
I've used it with tech characters to do the BMC, it always worked fo me but not my followers which is why I prefered casting the sense invisible spell which appeared to detect traps for my followers as well. I think its effectiveness may be dependent on tech allignment.