Make a magnetic field detector out of your Android phone
Your Android phone has a far more valuable sensor than you would realize, and that's alright. Your phone can assist you in accurately detecting electromagnetic interference and tiny magnetic fields without the need for costly instruments or specialized equipment.
You may utilize this cutting-edge technology in your pocket for free by installing an app from the Google Play Store (which doesn't require difficult installation files or APK files). It's neither magic nor science fiction.
A magnetometer, a sensor mostly used as a digital compass, is found in the majority of Android phones. It is in charge of both the proper operation of navigation applications and Google Maps' ability to determine your direction.
Remarkably, this sensor not only detects the Earth's magnetic field, but also detects minute changes caused by ferrous metals, electrical wires, or nearby electronic devices.
However, it's important to note that it has limitations: it's not a substitute for a professional metal detector or a sophisticated electromagnetic field meter. Nevertheless, it performs its function very well for home use or out of technical curiosity.
How can you use your mobile phone as a magnetic field detector?
To begin, you'll need a dedicated app to display magnetometer data. Several free options are available on the Google Play Store, but the easiest to use, and the one we recommend, is the Magnetometer app.
Once installed, the process becomes extremely simple:
- When you open the application, a value measured in microtesla (µT) will be displayed.
Under normal conditions, the surrounding magnetic field typically ranges between 25 and 65 microteslas. This value will be your reference point.
Keep your phone away from metal objects, and note when the reading stabilizes.
- Next, slowly move your phone over the area you want to analyze.
- If you get close to a metal object or an exposed electrical wire, you will notice a significant increase in the value.
In short, you'll first need to locate the sensor on your phone. You can do this by placing a nail or paper clip near different areas of the phone to see where the reading starts.
What is the purpose of this application?
With this you can use it to locate missing screws, detect electrical wiring behind walls before drilling, or identify sources of interference affecting your Wi-Fi or Bluetooth network.
However, we advise against placing your phone near strong magnets, as this may damage the magnetometer and affect the phone's compass. If this occurs, you will need to calibrate the sensor.
Magnetometer app