A gaussmeter, also known as a magnetometer, is a device used to measure the strength and direction of a magnetic field. Gaussmeter's are simple to use and handheld versions are available which can be carried to monitor magnetic fields as you walk. The device may also be referred to as an electromagnetic field detector, or EMF detector for short.
Place the magnet at the end of the probe and then slide it across the sensor. Hold it in this position for a few seconds while noting the reading on the Gaussmeter's display. The highest value produced by the meter is the magnetic flux density of the gauss meter.
The screen provides a reading of how strong the magnetic field is and may indicate the direction it's coming from. If the person holding it walks closer to the magnetic source the reading will rise and lowers if they walk away. Multiple sources can create conflicting readings, however, and may require more advanced technology to determine where the sources are coming from. Changes in the magnetic field depend on where the user is and the strength of the Earth's magnetosphere in that particular area. The sun interacts with areas of the magnetosphere differently and the strength of the signal can fluctuate with the sun's activity. Certain natural materials, such as specific rocks or rock formations, may also interfere with the Gaussmeter's reading.