AML PRO and AML+ Series all-material locators from SubSurface Instruments use ultra-high radio frequencies to find differences in subsurface densities for locating PVC and PE pipes and nearly any other subsurface object that has an edge. They are designed to locate subsurface materials indiscriminately, including plastic, metal, wood, cable or pipe, and work in clay, wet soil, snow or even standing water, according to the manufacturer. They have a durable ABS housing, advanced microprocessor, USB and headphone connectivity, and a variety of sensitivity levels. 855/422-6346; www.ssilocators.com.