Introducing the Revolution AV+, a unique combination magnetic compass and IMU with advanced vibration and sensor fault detection. It features 11 sensors electronically aligned in three dimensions and calibrated over a ‑50°C to 110°C temperature range. It is designed specifically for commercial, industrial and military users requiring high accuracy, repeatability, and low power consumption in dynamic environments. The Revolution AV+ is the newest addition to True North’s family of Revolution compasses that have an unparalleled reputation for quality and performance.

The Revolution AV+ can be used as either an electronic compass or an IMU, or both. In compass mode, a rich set of ASCII output strings that contain heading, pitch, roll, and diagnostic measurements are available for RS232 or RS485 output at up to 115,200 baud. IMU mode data is contained in a binary packet that can be streamed at 50Hz or captured by request. Operating mode can be changed by command input.

Built in diagnostic and test features ensure that all sensors are operating properly. Power-up and/or soft-reset electrostatic tests can be selected to verify accelerometer and gyro operation at startup. Run-time monitoring of ambient temperature, sensor voltage levels, electrolytic sensor impedance, and magnetometer set-reset offsets provides a high degree of confidence in reported measurements.

True North offers a development kit that includes the compass, cable, and software. The Revolution AV+ is covered by a full one-year warranty for workmanship.

Product Brochure (PDF)

Revolution AV+ Brochure (PDF: 97K / 3 pages)



  • Electronic Compass and IMU operating modes
    • 11 calibrated and aligned inertial sensors
    • ±250°/sec range, vibration rejection gyros
    • ±2, ±4, ±8, ±16 G selectable accelerometer range
    • ±2 Oersted (gauss) magnetic sensors with adjustable gain
    • ±40° dual-axis electrolytic (liquid) tilt sensor
    • Ambient temperature and input voltage measurements
    • -50° to 110 °C sensor temperature compensation range
    • Sensor measurements aligned to identical, orthogonal axes
  • Two independent serial output channels
    • RS232 and RS485
    • 2400, 4800, 9600, 19200, 38400, 57600, or 115200 baud
    • RJ12 and 8-pin header connectors
    • NMEA ASCII output format in Compass mode
    • 46-byte binary packet output in IMU mode
  • Single supply operation
    • Unregulated 5.5Vdc to 45Vdc input
    • Reverse polarity protection
    • Low operating current
      • 40mA Run mode (continuous measurements)
      • 10mA Sample mode (measurement on request)
  • Comprehensive diagnostic measurements
    • Power-up and software reset built-in electrostatic tests
    • Accelerometer vibration outputs in IMU mode
    • Sensor voltage and temperature operating tests
    • Magnetometer offset and bridge voltage tests
    • Electrolytic sensor impedance tests
  • PC Revolution Test Software
    • Windows XP through 11 compatible
    • Both Compass and IMU mode support
    • Change and verify settings
    • Record selected data is CSV (Excel) format
    • Communication, calibration, and settings logs

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