Measure the invisible magnetic fields that surround us, with this wide-range magnetometer. The MLX90393 is a wide range magnetic field sensor, that can measure 16-bits in ranges from +-5mT up to +-50mT in all 3 axes. Compared to most magnetometers, this gives a huge range, which makes it excellent for detecting magnets and magnetic orientation, rather than the Earth’s magnetic field. (Magnets have a much stronger field that overwhelms most magnetometers that would normally be used for orientation with respect to the North Pole)
Key Features:

16-bit output on all three (XYZ) magnetic field sensors
An unusually large dynamic range of 5-50 mT (1 mT or millitesla = 10 G or Gauss).
By comparison, the LSM303DLHC saturates at +/-8.1 G (0.81 mT) at maximum range setting.
Up to ~500 Hz sample rate (Based on OSR=0, DIG_FILT=2, HALLCONF=0xC for 1.84ms conversion time. See 15.1.5 HALLCONF [3:0] in the datasheet for details.)
User-adjustable I2C address to allow multiple sensors in your project (two I2C ADDR pins for four possible I2C addresses).

Resources
Datasheets, diagrams, Arduino & Python libraries, schematics and more in the Adafruit Learning System