Stanley STHT0-77406 "S200" Stud Sensor, Yellow/Black

It’s ok feel bit cheap but works

Initially I was put off buying this product due to all the poor reviews, but since it was a Stanley product I thought it must be OK. It arrived with a set of Mickey Mouse pictorial instructions that did not make any sense let alone tell you how to use the product properly. I went on the Stanley web site and was able to download a set of comprehensive instructions that described how to use the product properly. I found that if I followed these instructions the performance was excellent. Why can't Stanley supply the product with a proper instruction leaflet?

An easy to use device that allowed me to easily locate the uprights behind my drywall , mark them accurately the drill straight into them. Would definitely recommend!

After many hours of frustration I have come to the inevitable conclusion that this is simply a terrible product that isn't fit for purpose and doesn't do the job it's designed for.I'm an experienced DIYer, I've built my own music studio (framing, plasterboard, painting, doors and windows) and I've also built furniture and bicycles over the years—I'm not new to this sort of thing. I wanted to mount some heavy shelves and thought I'd use the studs for security, so I bought this stud finder after some research. In hindsight, I can't understand why anyone recommends it!I followed the instructions carefully, making sure to calibrate the device before use in an area without a stud. But it just wouldn't produce the same result twice. I used painter's tape to make pencil marks on, so I'm 100% sure I was measuring in the same place each time. My flat is a new build, and as far as I know completely standard materials. I also tried using two different brand-new 9V batteries, in case it was a power issue.Long story short, my first three screws did not hit any wood at all, even after repeated "positives" by the unit. I'm just going to buy some toggle bolts, like I should have done in the first place.It's absolutely terrible. If you're going to buy a stud finder, don't be like me—spend the extra and get a genuinely useful device, not this steaming pile of frustration.

Not easy to understand, but it is workable. I started to understand why other users give negative feedback to this product. This product was designed in the US, they don't have a switch to every AC socket like we have in the UK. The AC detecting is likely by sensing the magnetic field from the AC wire, when there is AC current going through the wire. When there is nothing plugged in or nothing is consuming the AC power through that wire, there is no current, and the magnetic field will be very weak, to weak to be detected. Same does the wire that goes to the light switch, if the light switch is off, there is no AC current, no magnetic field to be detected. Once I switch on the light, it gives the correct sensing.When switching on every time, it is a must to hold it for about 3 seconds, to wait for "READY" to appear - the so called calibration process. Try a few known places, if it doesn't give any signal, try to do that calibration process again with a different spot.For the AC, I find it can be sensitive, pick up the AC wire some distance away. I suspect when they design this in the US, was based on the AC 110V, which the current will be a higher (if the appliance uses the same Watts of power). In the UK, as we are AC 230V here, the current is lower, the magnetic field is weaker too, so the AC detection is less precise. I suspect they didn't tune it for the European AC voltage/current - come on Stanley Black & decker, you can do better than that!If it can bundle a small pouch for keeping, that will be better. Buying from Amazon saves me £10, comparing to the price in B&Q.It's not perfect, I think I can use it (before it grinds my gears!)

Am enjoying running this over all my walls prior to starting any renovations we are planning. Seems to work, not been electrocuted or flooded yet

Great tool ------ no tool box should be without one ------- very accurate ---- Thanks again.

Good value and works exactly as expected. Also it Arrived quickly. Have used on many occasions and it works perfectly on plasterboard stud walls, as the advert says it should. It does not seem to work on brick walls.