Abstract: For locating a ferromagnetic object, a device has a non-magnetic housing with a perimeter wall, a front surface, and a rear surface. The perimeter wall defines a chamber within the housing. A stop element is located within the chamber between the front surface and the rear surface. A magnet element is housed within the chamber and is movable between a resting position, where the magnet element is proximate the stop element, and an active position, where the magnet element is proximate the front surface. The device has a mechanism for returning the magnet element to the resting position in the absence of a ferromagnetic object located proximate the front end of the device.

Abstract: A device for locating a ferromagnetic object has a non-magnetic housing with a front end, a rear end, and a perimeter wall defining a chamber within the housing. A ferromagnetic member is housed within the chamber in a substantially fixed position. A magnet element is housed within the chamber between the front end and the ferromagnetic member, wherein the magnet element is reversibly movable between a first position in which the magnet element is proximate the ferromagnetic member, and a second position in which the magnet element is proximate the front end.