What's the shape of the enclosed area?

Is this for intrusion detection, as at the Israeli border, or for security, as around a displayed piece of jewelry? Do you prefer that the "intruder" wind up dead or alive? At what distance are the two parallel bars situated? How many pairs of these bars do you intend to deploy?

What's your price target? If you're protecting cigarettes at the sales counter in a convenience store, a few tens of dollars might be too much. OTOH, if you're protecting the launch codes that would start global thermonuclear war if stolen, perhaps a few billion dollars might not be too much.

RE