Pocket Magnetometer 20-0-20 Gauss

DC magnetic fields can develop in many steel or iron objects if they have been exposed to magnetic fields, current, or friction. Even structural members in barns can become magnetized due to stray voltage. This hand-held device detects residual magnetism in steel parts quickly and accurately. Place it near or against the object being tested, and the needle gauge reads magnitude and polarity of the magnetism in the object at that site. Will also verify thoroughness of de-magnetizing. Check your car, bed frame, desk furniture or any other metal objects you spend time with, even check the strength of magnets.