Will also locate steel studs. Basically the radar in the stud finder shoots out a radio wave that bounces back once it reaches an object.

How To Use A Stud Finder
Stud finder how it works. The circuit in the stud finder can sense the change and reports it on its display. The second patent below shows you exactly how to build this sort of stud finder. The latest technology in stud finders uses a very small radar system to detect the stud. By measuring the electrostatic field of a wall and detect slight differences in the flow of electrons stud finders detect the relative change in density and thereby studs showing the best place to drive that nail. Slide the stud finder across the wall and it will beep andor light up when it crosses a stud. When pointed at an empty wall the sound takes longer to bounce back than it does when it is in front of a stud.
This is the simplest most effective way to find studs. Stud finder that utilizes a moving magnetic piston to locate studs under sheetrock plaster or tile. As you would imagine this is an indispensable gadget when it comes to hanging a coat rack a shelf or any heavy duty object on the wall. Any stud finder will work well however they all work differently. If you have just moved into. It works on a capacitance differential generated by density difference.
Its only too bad we can have them design one to find underground wiring. How it works use a stud finder. They also detect metal nails density changes and wires. Stud finders are little devices used to locate the beam of wood metal wiring running through drywall so you can find something strong to screw things too. Because standard stud finders detect a change in density inside the wall they dont work on lath and plaster the density inside these walls is not constant enough. A stud finder is essentially a battery operated electromagnetic tool that detects the so called framing studs.
Modern electronic stud finders operate by measuring the capacitance difference in the wall to identify where a wall is denser. A stud finder also stud detector or stud sensor is a handheld device used with wood buildings to locate framing studs located behind the final walling surface usually drywall. A simpler stud finder. Getting a bead on your studs another really cool product is the franklin prosensor 710 stud finder which can locate multiple studs at the same time and uses an array of leds to indicate the position of a wood or steel stud behind the drywall. Theyre incredibly useful and you can find a huge range of them online. They are normally handheld devices which are used to sense where the material behind the device is denser.