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MRU D

Motion Reference Unit

The MRU D is the fifth generation roll and pitch motion sensor specially designed for marine applications, ideal for roll and pitch measurements on board ships. The sensor is paramount within voyage recording, dynamic positioning systems, fishing sonars, and telecommunication antenna systems. Its precise orientation requirements and limited range make it best suited for applications where consistent roll and pitch data are necessary. For applications requiring unrestricted mounting orientation or range, other MRU models with three-axis sensors are recommended.

Optimized Design and Performance

For proper functioning, the MRU D unit must be mounted with the connector oriented vertically, and is best paired with systems that have a restricted range in roll and pitch motions. The accuracy of roll and pitch measurements remains unfazed even when the sensor is positioned away from the vessel Center of Gravity (CG) thanks to its ability to reduce the impact of horizontal acceleration on performance. This advanced suppression ability sets the MRU D apart from standard inclinometers, pendulous units, and Vertical Reference Units. Moreover, every MRU D device comes with a Calibration Certificate, affirming its tested precision and compliance with stipulated standards.

Adaptability and Convenience

Data from the MRU D is readily available through distinct communication channels including serial lines and an Ethernet interface, ensuring easy distribution to multiple onboard users. The data outputs are adjustable and can be transmitted in different formats such as IEEE 32-bit floats or scaled integers. Additionally, the sensor can furnish NMEA 0183 proprietary sentences, illustrating its compatible use within varied digital interfaces.

Key features

  • 0.35° roll and pitch accuracy
  • Outputs real-time roll and pitch measurements
  • Suppression of horizontal acceleration when mounted off the vessel Center of Gravity (CG)
  • Outputs on RS-232, RS-422, and Ethernet
  • High output data rate (200 Hz)
  • High reliability and no scheduled maintenance, no mechanical wear-out parts
  • Small size, light weight, and low power consumption
  • Each MRU delivered with Calibration Certificate
  • Selectable communication protocols in the Windows-based MRU configuration software
  • Export license not required
  • 2-year warranty

Product range

    Technical specifications

    Output

    Roll/pitch Static RMS:
    0.2°
    Roll/pitch Dynamic 1-sigma:
    0.15°

    Downloads

    Data sheet

    Release notes

    Misc. information

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