[Source] The LX-4 proton mine was a self-detonating defensive mine produced by Merr-Sonn Munitions, Inc. for use by the Imperial Military. The LX-4 makes use of a refitted Proton torpedo warhead for both anti-vehicle and anti-personnel use. The mine was buried to a depth of half a meter as part of creating an effective defensive perimeter. It utilized two sensor suites: a gravity-sensitive sensor which detected the magnetic disturbances of passing vehicles, and a thermal sensor which detected body heat. An intruder detected within five meters of the mine would cause it to detonate.