Schonstedt GA-92XTD Portable Magnetic Field Locator
The Schonstedt GA-92XTD portable locator detects magnetic fields up to 16 feet below the surface. An audio alarm will signal and become louder and faster the closer you get to the magnetic field.
The GA-92XTD is used to detect ferromagnetic objects like property markers, manholes, septic tanks, well casings, valve boxes, cast iron pipes, steel drums, and unexploded ordnances (UXO). It extends for greater sensitivity and retracts for easier carrying and portability.