If you've read any of our Troubleshooting or FAQs regarding stud finding, the first thing we're likely to mention is "Make sure the StudSensor™ tool is calibrated." You're probably wondering why that's so important, or why you can't just turn on the tool and use it?
If all walls were built the same, it would actually be that easy. Unfortunately, every single wall is a different combination of wood types, drywall thicknesses, paint coatings, and so on. In order for a stud finder to see through a wall and determine where a stud is, it has to know what the wall "looks" like to its sensors in order to differentiate the stud. Calibrating the StudSensor™ stud finder on an empty wall gives the device a chance to measure the wall thickness and material density, as well as register factors like humidity, temperature, and even the minor electric readings from your hand, which all have an impact on the readings from the wall.
Zircon® stud finders are incredibly sensitive, which makes sure you get the most accurate reading when scanning for a stud. However, this also means that changes in the surface, ambient moisture, a buildup of static electricity or even re-positioning your hand on the StudSensor™ tool can interfere with the readings. Don't worry, though; if you follow the instructions for use, rest assured you're getting spot-on results.