Dytran Accelerometers for HUMS, VHM, and CBM

Dytran accelerometers are specifically developed to meet the challenges of tough airborne environments and are used in Health and Usage Monitoring Systems (HUMS), Condition Based Maintenance (CBM), and Vibration Health Monitoring (VHM) programs to improve operational safety, reduce maintenance costs, and increase aircraft stability. 


  • Rotor Track and Balance: Airborne, internally amplified HUMS and base-isolated accelerometers can be used for rotor track and balance, rotor smoothing, airframe vibration feedback and swashplate bearing wear indicators. Other common uses are in wide–band frequency aircraft/airframe vibration measurements and general-purpose HUMS applications, modal and structural analysis, as well as vibration control.
  • Hanger Bearing, Tail Rotor, Driveshafts: Sensors in this category measure imbalance, misalignment, and bearing wear in drive shafts and slower-rotating components. This group features the Dytran-innovated “Bracket-Style” mounting configuration that allows installation under the head of a bolt, eliminating the need for a separate mounting bracket. Measurement axis direction varies according to the intended mounting location, allowing orientation of the accelerometer to the axis of greatest motion.
  • Transmission, Gearbox, Bearings: This group addresses the main gearbox, accessory gearbox, intermediate and tail rotor gearbox. Users select these sensors for shaft order 1 (SO1), shaft order 2 (SO2), gear mesh frequency, gear tooth indicators, and bearing wear indicators. This group is characterized by the excellent high-frequency response to 20 kHz and ring-style mounting to accommodate cable and connector orientation.
  • Engine: Designed for power turbine and gas generator “hot section” locations to measure vibration spectrum during run-up and SO1, SO2 at the shaft origin between the engine and transmission. The products are configured using charge-mode (non-amplified) high-temperature accelerometers, an in-line charge amplifier, and interconnecting cables. The combined system operates from IEPE power and allows the user to measure vibration in a high-temperature location while mounting the amplifying electronics in a remote, lower-temperature environment.
  • CAN-MD®: A radically new sensing approach that eliminates the need for a centralized processing unit or “HUMS box.” CAN-MD® CAN-Bus based sensors contain integral DSP microprocessors to allow for all signal processing to be done within the sensor itself, eliminating the need for a centralized Data Acquisition System. CAN-MD® offers a highly expandable system with a capability of adding up to 31 sensor nodes on a single CAN-Bus.


  • Improved operational safety
  • Reduced maintenance costs
  • Increased aircraft stability
  • Distributed processing scenario
  • Reduced system complexity
  • Increased reliability

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