Inert Mercury Tilt Switch

The X-ray correct, inert, mercury tilt-switch firing circuit contains all of the necessary components of an improvised explosive device (IED). The circuit is fully functional and will demonstrate that the firing switch has been activated by illuminating the LED in the blasting cap. The circuit board contains an X-ray correct battery, wire, switch, detonator, and inert explosive.

Powered by four AAA batteries, this IED circuit would be activated when the mercury makes contact with the two wire leads. The P.E.4 simulant is engineered to have the same density and effective atomic number (Zeff) as the real explosive threat.