Eli5: how do stud finders work?

171 views

Title

In: 33

7 Answers

Anonymous 0 Comments

[removed]

Anonymous 0 Comments

[removed]

Anonymous 0 Comments

[removed]

Anonymous 0 Comments

Fun fact: I used to use a stud finder to check and see if my kids diapers needed changing. Worked great.

Anonymous 0 Comments

Not very well in most cases. Knocking, using a level or other straightedge to find butt joints, using rare earth magnets to find screws, or looking for shadows is way more effective.

edit: you can come at me, but every experienced tradesman I know, myself included, can find studs faster, more reliably, and on more different surfaces (eg: not just 1/2″, 16″ studded drywall) than any finder on the market. But most of us still have one or two.

Anonymous 0 Comments

I don’t think they do, at least not in my experience. I use a magnet, find a head of a drywall screw then measure out to one side. Find another head and confirm 16” centers.

Anonymous 0 Comments

At varies based on the stud finder but a lot of low/mid quality units use electricity. The drywall has a level of resistance/capacitance to electricity that the stud finder measures. It is basically how hard it is to push electricity through the wall. When the finder flies over a stud, the capacitance/ resistance changes and the stud finder senses that.

More advanced units use radar based technology.