Magnetic Sensing Unit (MSU)


Accurate and compact, the AHR150A-2 reads three axes of measurement to provide reliable heading data.

Product overview

The AHR150A-2 is Archangel’s principle Magnetic Sensing Unit (MSU). Developed as the heading reference sensor for the AHR150A ADAHRS, the AHR150A-2 carries the same certification record with DO-178B Level A software, rigorous DO-160E categories, and TSO approval C6e for Magnetic Direction Instruments.

The “-2” also partners with the AHR75 and the AHR50 AHRS. In fact, every Archangel customer flying any of Archangel's AHRS/ADAHRS products is also flying the AHR150A-2.

Archangel also offers the AHR150A-2 as a standalone MSU. Our delivery package includes all ICD information your team needs to develop interfacing software and hardware without violating the MSU’s DO-178B certification.

Within the AHR150A-2, solid-state sensors directly measure the local magnetic field in three dimensions. This approach provides two significant improvements over traditional flux gate technologies. First, the output response to heading changes is faster, ensuring the data readings stay accurate. Second, with no moving parts, the AOG time and labor costs associated with flux gate maintenance are virtually eliminated.


  • Certified for Part 23, 25, 27, and 29 aircraft
  • MIL-SPEC 38999 filtered connections
  • Integrated cable length can be customer-specific
  • Footprint matches that of standard flux gates, simplifying the installation transition


  • DO-160E Environmental certifications including EMI, EMS, and HIRF
  • DO-178B Level A software
  • FAA TSO C6e
  • EASA equivalent to TSO C6e


The AHR150A-2 is exportable to most countries worldwide without an end-user statement.

Additional images

Alternate view of AHR150A-2

Product inquiries

For inquiries about the AHR150A-2, use our online contact form or phone Bill Dillard at 334.826.8008 x14.