Attitude Heading Reference Systems (AHRS)

Get superior performance with our nine-degree-of-freedom (9DOF) strapdown Attitude Heading Reference systems (AHRS) and modules with Kalman filter & attitude/heading algorithm for accurate roll/pitch/heading in dynamic environments.

The PNI TRAX attitude and heading reference system (AHRS) provides unparalleled heading and accuracy when static, while moving and when encountering magnetic distortion. TRAX employs a patented Kalman algorithm that intelligently fuses PNI’s patented reference magnetic sensors with gyros and accelerometers to overcome errors due to erratic motion and changes in the local magnetic field.

The new PNI TRAX2 AHRS & digital compass module incorporates PNI’s military-grade magnetic sensors with proven sensor fusion and digital compass algorithms to provide accurate direction and orientation in demanding conditions.

Aceinna’s & Memsic inertial systems provide end-users and systems integrators with fully-qualified MEMS-based solutions for measurement of static and dynamic motion in a wide variety of challenging environments including avionics, remotely operated vehicles, agricultural & construction vehicles and automotive test.

Aceinna is a spin-off of Memsic Inc. a world leader in MEMS sensor technology.

Current product offering includes the OpenIMU300ZA and AHRS440.


Quotation Request



The ACEINNA OpenIMU300ZA is an easy-to-use high-performance 9 DOF open inertial platform. The OpenIMU300 features a precision 3-Axis Accelerometer, low-drift 3-Axis Rate Gyro, and 3-Axis Magnetometer. The low-power platform is powered by a 168MHz ARM M4 CPU with a Floating Point Unit. The OpenIMU300 runs the OpenIMU open-source stack that includes an optimized full-state Kalman Filter for Attitude and GPS-Aided Position-Velocity-Time (PVT) measurement. A free tool-chain based on VS Code supports PC, MAC, Ubuntu.

Key Features:

  • Open Source Tool Chain
  • Custom Algorithms
  • 168MHz ARM M4 CPU
  • Built in 16-State Open Source Extended State Kalman Filter
  • Low-Drift 3 axis MEMS angular rate sensor
  • High Performance 3 axis MEMS Accelerometer
  • 3 axis magnetic sensor
  • SPI and UART interfaces
  • Up to 3 UARTs
  • Wide Temp Range, -40C to +85C
  • High Reliability
  • MTBF > 50k hours
  • Open Community & Support