คำอธิบาย Metal Detector

Metal detector measures nearby electromagnetic fields using the phone's
built-in magnetometer compass. The magnetic field level(EMF) in nature is
about 30~60μT(microtesla) or 300~600mG(milligauss); 1μT = 10mG.
If there is any metal in the area, the strength of the magnetic field
should increase.
This app measures magnetic field value using the built-in magnetic sensor
that is built into your device. The magnetic field level(EMF) in nature is
about 49μT(micro tesla) or 490mG(milli gauss); 1μT = 10mG.
The accuracy of metal detector depends entirely on the sensor in your device.
Usage is simple: Open this app on your device, and move it around. The
magnetic field level will constantly fluctuate. That's it!
Note : magnetic sensor is affected by electronic equipment (TVs, PCs, etc.)
due to electromagnetic waves. This is not a bug in the app.

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