Introduction: Turn Your Smartphone Into a Metal Detector Sensor

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What Is Metal Sensor....?
A metal detector is portable electronic instrument which detects the presence of metal nearby Metaldetectors are useful for finding metal inclusions hidden within objects such as metal objects buried underground. They often consist of a handheld unit with a sensor probe which can be swept over the ground or other objects. If the sensor comes near a piece of metal this is indicated by a changing tone in earphones, or a needle moving on an indicator. Usually the device gives some indication of distance; the closer the metal is, the higher the tone in the earphone or the higher the needle goes. Another common type are stationary "walk through" metal detectors used for security screening at access points in prisons, courthouses, and airports to detect concealed metal weapons on person's body.

NOTE:-
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.
If there is any metal in the area, the strength of the magnetic field should increase. Sometimesthis app used to find electrical wires in walls (like a stud finder) and iron pipes in the ground
Usage is simple: Open this app on your device, and move it around. The magnetic field level will constantly fluctuate. That's it!
The accuracy depends entirely on the sensor in your device. Note that the magnetic sensor is affected by electronic equipment (TVs, PCs, etc.) due to electromagnetic waves.
If this app does not work properly, it may mean that your phone's sensors are damaged, broken or non-existent. To initialize the sensors, point your phone up towards the sky and move it in a figure 8 pattern. Especially, a view cover with a magnet or a leather case with a magnetic snap can cause unwanted results.

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