They are based on the micropower impulse radar as the underlying technology, and stud finders using this technology was invented by Thomas McEwan and patented in 1995. With more sensors, these stud finders do not require calibration and adapt better to inconsistencies in wall construction.Īs of 2013, a few stud finders were available on the market based on ultra-wideband radar scanners for sensors. These sensors can indicate the location, width, and lack of studs simultaneously. Recent developments include stud finders with multiple sensor plates that sense the wall in multiple places. Since 1998, many developments and improvements have been made to the internal capacitor stud finders and increased their popularity. While novel, these electronic stud finders did not always prove effective in locating studs. His patent was put into production by the Zircon Corporation, which became the sole producer of electronic stud finders until the patent expired in 1998. In 1977, Robert Franklin designed an electronic stud finder that relied on an internal capacitor to measure changes in density behind the walling. Stud finders have been in use since the early 20th century, and the first ones were all magnetic, relying on internal magnets to detect the walling fasteners or nails presumably attached to studs. There are also some devices employing radar. While there are many different stud finders available, most fall into two main categories: magnetic stud detectors and electric stud finders. Will also locate steel studs.Ī 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. Stud finder that utilizes a moving magnetic piston to locate studs under sheetrock, plaster or tile.
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