Ditch Witch 2450GR ground-penetrating radar system locates and detects electric, water, sewer, gas conduit, piping, and communications cable. Radar pulses image the subsurface and detect both metallic and nonmetallic pipes and cables up to 19 feet. It’s effective in ground conditions including rock, soil, pavement and other materials, the company says. It has 5.6 mph survey speed with digitally controlled radar. Mounted on a four-wheel cart with 14-inch wheels, the unit can be used on rough terrain and loose soils.