Stanley FatMax Stud Finder 400 (often referenced interchangeably with the S300 or similar high-end FatMax sensors) is a professional-grade tool designed to detect the edges and centers of wood and metal studs, as well as live AC wiring behind walls.
You don’t need to be a tech wizard to use this tool, but you need to follow the calibration process correctly. Most "failed" readings happen because the user skipped this step. stanley fatmax stud finder 400 manual
Approach from the opposite direction to find the other edge and mark it. The center of the stud is the midpoint between these two marks. Critical Safety Notice: Recall Information In 2009, certain FatMax 400 (Model 77-730) units were Approach from the opposite direction to find the
If your Stanley FatMax 400 is acting up, check these common culprits before assuming it's broken: stanley fatmax stud finder 400 manual