The stanley intelli tools stud sensor 200 uses one pass centre find technology to locate the centre of studs joists or live ac wires through drywall or other common building materials once the centre of a stud has been detected in one pass across the surface the stud sensor 200 gives a visual display and sounds an audible tone a v shaped marking channel allows easy marking of the stud centre and edges the stud sensor 200 has an lcd screen its ergonomic design and soft grips provide comfortable