Utility locating combines science with art. Among the biggest challenges is locating nonmetallic structures, such as plastic pipes installed without tracer wires or with such wires that have corroded away or lost their connections.The Innspector 07 locator from SubSurface Instruments Inc., of De Pere, Wis., is designed to let municipal and utility workers find pipes and other structures almost regardless of material: metal, concrete, plastic, clay and others. It is a light, handheld device that requires no calibration and the bare minimum of operator adjustments.The manufacturer says the unit can find essentially everything that can be located with current technologies,
