Backed by over half a century of data acquisition and analysis success, we are proven experts. We’ve combined our engine expertise with cutting-edge technology to bring you the best in meaningful engine data. As a trusted source for engine manufacturers, we directly embed engine-specific algorithms to enhance engine health and performance information. Howell’s H396 Series Data Acquisition Unit is a self-contained, fully redundant system that acquires both analog and digital engine data and processes it in customized formats.


  • Software certification to DO-178B DAL A
  • Multiple digital interface including:
    • RS422
    • RS232
    • ARINC825
    • ARINC429
  • Up to 124 programmable discretes
  • Configurable to interface with any engine application
  • Expandable architecture allows for customization
  • Engine power assurance check
  • Transmission chip detection and burn-off
  • Second harmonic fuel flow

H396 Series Data Acquisition Unit (DAU)