Wireless 3-Axis Magnetic Field Sensor - PS-3221



Simultaneously measure magnetic fields on three axes with this dual range wireless sensor that is sensitive enough to measure the Earth's Magnetic Field.

The 3-Axis Magnetic Field Sensor can sense the Earth's magnetic field as well as fields from coils and bar magnets and current carrying wires. There are two ranges: ±50 gauss and ±1300 gauss that are user selectable.

Measure the three components of the magnetic field as well as the resultant or, if desired, measure the field along a single axis or any two of the axes depending on your experiment.

The sensor measures the X, Y, and Z components of the magnetic flux density in tesla, millitesla, and gauss. The arrangement of the X, Y, and Z components is shown on the top label.

This sensor is ideal for investigating static fields.

Typical Applications

  • Map a magnetic field
  • Study the field strength of permanent magnets or current carrying wires & electromagnets
  • Examine the field strength of a solenoid
  • Measure the field strength of a Helmholtz coil
  • Explore the Earth's magnetic field

Special Features

  • Simultaneous measurements on three axes
  • Dual range: ±50 G and ±1300 G
  • Sensitive enough to measure the Earth's magnetic field
  • Measure fields from bar magnets and coils
  • Long-lasting rechargeable battery

No need for an interface.

All PASCO Wireless Sensors connect to computers, Chromebooks, and tablets, through Bluetooth 4. No other equipment required! Our software (SPARKvue or PASCO Capstone) allows students to see and analyze data in real time.

Long lasting, rechargeable battery

The Wireless 3-Axis Magnetic Field Sensor draws as little current as possible. This provides you with long battery life for lab activities. Our software also displays the battery level at all times. If it dips too low, connect the USB cable to charge while you collect data.

Bluetooth Low Energy Wireless Connectivity

Required Software:

PASCO products that use Bluetooth® Low Energy connectivity (wireless sensors, Smart Carts, and the AirLink) require the latest versions of our software.

PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

Additionally, the Wireless Motion Sensor and Wireless Smart Carts can be connected via Bluetooth and used with our MatchGraph app.

Compatibility/System Requirements

Any current model Chromebook, Mac, iPad, iPhone, Android tablet or phone will support direct connection to PASCO Bluetooth Low Energy devices. Also, any Windows 10 device with Creators Edition 1703 or later will support direct connection.

Chromebook users MUST have the latest firmware updates for ALL wireless sensors in order to use them without the USB Bluetooth Adapter. Full information.

All other Windows computers/tablets, older Macs, and Chromebooks without updated sensor firmware currently require the PS‑3500 USB Bluetooth Adapter to connect to PASCO’s Bluetooth Low Energy devices.

Full compatibility details are available, including compatibility information for older computing devices.


Independent datalogging 

Long term data collection directly on the sensor

In logging mode wireless sensors collect data to their onboard memory for hours, days, weeks or even months at a time without needing to be connected to a computer, tablet, Chromebook or smartphone.

When the experiment is concluded, simply connect the sensor to a device running PASCO software and download all the measurements it recorded.




  • 3-Axis Magnetic Field Sensor
  • Sensor Mounting Rod
  • USB Cable (for recharging and optional direct connection)


  • +/- 50 G (49.1 G)
  • +/- 1300 G
  • +/- 0.01 G (50 G range)
  • +/- 2 G (1300 G range)
Max Sample Rate
  • 100 Hz
  • Magnetic Field Strength (3 axes and resultant)
  • Yes
  • Rechargeable Lithium-Polymer
  • Direct USB or via Bluetooth® 4.0

Buying Guide

USB Bluetooth Adapter

Windows devices, Chromebooks and older Macs lack native Bluetooth® Smart support and require an adapter to use PASCO wireless products.

All current model Macs, iPads, iPhones, Android tablets or phones support direct connection to PASCO Bluetooth Smart devices and do not require the adapter.

Full compatibility details are available at pasco.com/compatibility.

USB Bluetooth Adapter   PS-3500

Software Required

SPARKvue software or PASCO Capstone software may be used. PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

Learn more about Bluetooth Compatibility.