How would it work in your game?
I am thinking about Opposed or Competative Force roll...
Force detector
Back in my Ways of the Force fan supplement, I wrote up Force detectors as a new item. I just had it require a Hard Computers check and one minute on the part of the operator, and that if successful it'd reveal if a character had a Force Rating of 1 or higher. I'd say the operator would have to be engaged with the intended target, making it similar to a metal detecting wand used by security in airports and arenas.
Thanks Donovan for the input 
Anyone else wants to take a jab at this? 
A midicholorian detector! No one knows what their relation is to the force, but the empire often use it as a screening measure for stormtrooper and other security forces to identify potential candidates.
Look, don't shoot me, but it makes a lot of sense for the Jedi to have researched this, and for palp to have this knowledge availble. The other good thing is that it's obscure, the average guy would only know to report people with an adnormal concentrations of these things.
IIRC in the old EU the jedi did use midiclorian counts in order to screen for potential candidates (at least in the core worlds).
