Physics Toolbox Magnetometer

Measure magnetic fields with your phone. Graph, record & export sensor data.

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

Four Powerful View Modes
• Chart View
Live graph of magnetic field strength in microtesla (µT) over time across X, Y, Z axes and total magnitude.
• Multi Graph
Compare all axes simultaneously in a multi-panel display.
• Digital Readout
Clean numerical interface for precise real-time measurements.
• 3D Compass
Visualize magnetic field direction in three dimensions.

Advanced Data Tools
• Record and export data as CSV via email, Google Drive, or any sharing app
• Three signal filters: Kalman, Low Pass, and Moving Average
• Adjustable sample rate for slow or fast phenomena
• Switch between elapsed time and clock time on the x-axis
• Fullscreen graph view for detailed inspection
• Customizable plot line thickness

Classroom and Lab Ready

Designed for real scientific 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 concepts

Professional and Hobbyist Applications
• EMF detection and field mapping
• Speaker and motor diagnostics
• Geomagnetic surveys and field work
• Metal and magnet proximity sensing