sensor77Stud Sensor (77-110) 1 Stud Sensor The Stanley IntelliSensor™ Stud Sensor uses electronic snals to locate the edges of studs or joists through drywall and plywood at a maximumMetal Sensor - 77-445 Advanced metal selector can set to detect rebar, iron pipe or copper pipe Metal depth can be determined to a depth of 75mm (+–7mm accuracy) LCD displays Senses