Okay its a little bit more complex than that. There are two main types of stud finder magnetic and electronic.

The 10 Best Stud Finders
Consumer reports stud finder. Knowing where those are is crucial so you can be sure to screw into them instead of just the drywall when youre hanging something. Hanson 03040 magnetic stud finder includes a small level that you can rotate either vertically or horizontally depending on the orientation of the tool a feature that helps with locating. The nails that hold studs together are magnetic and so are dry wall fixings. We would like to show you a description here but the site wont allow us. Magnetic stud finders use a very simple concept. Get unbiased ratings and reviews for 9000 products and services from consumer reports plus trusted advice and in depth reporting on what matters most.
Some electronic stud finders let you preview a digital map of the stud beneath the wall on an led screen others feature led lights across the top that blink when the finder is passed over a. A stud finder uses one of a few different methods in order to return a signal which can give you the precise location of the wood reinforcement in your home. A stud finder is a tool which allows you to find studs. The franklin sensors prosensor 710 precision stud is battery powered that is very light only weighing 9 ounces and being 72 x 3 x 2 inches in size. A stud finder is good for well finding studs you cant see. If your magnetic stud finder sticks to the wall theres a good chance theres a stud there.
The stud finder is very efficient because it can detect more than one object at a time and identify the width of the objects identified. Not surprisingly there are some pretty strong magnets involved. The small size will not take up much space in your tool box.