Physics Toolbox Magnetometer

Measure, record, and analyze magnetic fields in real time using your phone’s built-in magnetometer. Physics Toolbox Magnetometer is a precise magnetic field meter used by students, teachers, engineers, and researchers worldwide.

Four View Modes

• Chart View — a live graph of magnetic field strength in microtesla (µT) over time, across the X, Y, and Z axes and total magnitude
• Multi Graph — all axes at once in a multi-panel display
• Digital Readout — numbers alone, for precise real-time measurements
• 3D Compass — the direction of the field in three dimensions

Data Tools

• Record and export data as CSV by email, Google Drive, or any sharing app
• Three signal filters: Kalman, low pass, and moving average
• Adjustable sample rate for slow or fast phenomena
• Elapsed time or clock time on the x-axis
• Fullscreen graph view for detailed inspection
• Adjustable plot line thickness

Classroom and Lab Ready

Built for real investigation. Use it to:

• Verify the inverse square law for a point source magnet
• Measure solenoid field strength as a function of current or coil geometry
• Detect the frequency of magnetically driven objects, such as speakers or stirrers
• Map Earth’s background magnetic field
• Locate hidden permanent magnets or ferromagnetic materials
• Demonstrate electromagnetic induction

Professional and Hobbyist Uses

• Speaker and motor diagnostics
• Geomagnetic surveys and field work
• Metal and magnet proximity sensing