What is Reddit's opinion of Magnetic Stud Finder?

From 3.5 billion Reddit comments

I used this app in a pinch.

Thanks for recommending an iron baking tin. I ordered a Lodge iron griddle from Amazon.

www.amazon.com/Lodge-Single-Burner-Reversible-Griddle-10-5-inch/dp/B000E1WA7Q/ref=sr_1_6?ie=UTF8&qid=1437196851&sr=8-6&keywords=lodge+griddle&pebp=1437196861514&perid=1W5H95F3C86Z7TWARNXN

10.5 inch square is the perfect size for my ten inch netbooks. Its slightly smaller than my Lenovo X200 12 inch laptop. Fits into my backpack but too heavy at 8 pounds.

You are right an iron cookie box would make a great fornsic bag. I looked for an iron cookie box on Amazon and eBay in United States but none for sale. I never seen them at antique stores.

Your recommendation of an external keyboard would be fine for work on a desk. I carry my laptop around in my backpack and often use it on my lap. I will try the iron griddle on my lap. If that does not provide adequate protection, I will use a desk and external keyboard.

I apologize for the delay in responding. I wanted to retest with a hand held gauss meter. Good DC gauss meters are over $300. Since a body volt meter, AC gauss meters and/or a RF meter are higher priorities, I searched for a more accurate Android gauss meter app.

Magnetic stud finder app by GoldSequence offers recalibratation.

https://play.google.com/store/apps/details?id=com.goldsequence.magneticstudfinder

Has very little documentation. Measurement unit is obviously uT.

Instruction video at: http://www.youtube.com/watch?v=dZmd5vkag7o

To find the location of the magnetic sensor in my Motorola Droid 4 smartphone, I rotated it next to a brand new 10.5 inch cast iron griddle. The magnetic sensor is in the top center of the phone.

Base reading outside on a first floor balcony is 44 uT.

I removed the battery from my Lenovo X200 battery. Unplugged.

I placed the top of the phone on the left hand central edge of the Lenovo X200 laptop where the tab key is. 1,265 uT

I moved the phone up to the left hand upper edge of the laptop where the F1 key is. 1,484 uT

Middle of left bezel of screen screen is 257 uT. Upper left hand corner of screen bezel is 149 uT.

I flipped over the laptop. The top of laptop (exterior screen) 210 uT. Back of bottom of laptop 1,480 uT

In comparison, I placed the smartphone on top of the iron griddle 111 uT.

For the measurements to be so high, there must be a magnet behind the keyboard and a magnet on the screen.

In comparison, I placed the phone on a refrigerator magnet. 324 uT. The refrigerator magnet is weak compared to the laptop magnets.

Neodymium is the strongest magnet. Are lid closure sensors made of neodymium magnets?

Photo of magnet in top center bezel of screen of a Dell laptop is at: www.insidemylaptop.com/replace-screen-dell-studio-1555-laptop/

I will disassemble the screen and take photos to compare to the Dell laptop.