While its rudimentary appearance might suggest otherwise, this is a remarkable stud sensor. Not only is it easy to use, but its readings are practically impossible to misinterpret. At 7" wide, it covers a broad test area, with 13 sensors that independently scan up to 1-1/2" below the surface. As soon as any of the sensors detect material of greater density than the surroundings, it shows the position by illuminating a red LED bulb.
Wide enough to span most structural timbers, the LED array can indicate the full width of the stud, not just the edges, so finding center is simple – no need to sweep back and forth to outline the location. As well, unlike typical detectors, the sensors require no calibration before each use to prevent false readings; just place the unit against the wall and press the button for an instant reading.
A reliable means to locate studs as well as floor joists or other hidden substructure behind drywall, wood and plywood, it even differentiates closely positioned studs, such as those around door and window frames. A low-friction backing glides smoothly over surfaces.
Intuitive to use, it operates on two AA batteries (not included). An excellent tool.