We have bolstered our proven range of Motion Sensors with the introduction of two
new cost-effective Motion Reference Units (MRU). The MRU D and MRU Z are 7cm shorter
than existing Kongsberg MRUs, but incorporate common features such as no moving
parts, low maintenance, software compatibility, Windows based configuration and
data presentation software.
The MRU D is a roll and pitch sensor specially designed for motion measurement
in dynamic marine applications. The unit incorporates 2-axis MEMS sensors for both
linear acceleration and angular rate. With 0.5° accuracy the MRU D is ideal for
dynamic positioning, ADCP and other vessel applications requiring roll and pitch
With heave measurements that meet IHO standards, the MRU Z heave compensator
with roll, pitch and heave output is a cost effective product for survey applications
requiring accurate measurements in environments with extreme horizontal acceleration.
The unit incorporates 3-axis MEMS sensors for both linear acceleration and angular
rate. Roll and pitch accuracy is 0.15° and with 5cm or 5% heave accuracy the MRU
Z is ideally suited for single beam echosounders and offshore crane applications.
All our MRUs are tested and calibrated through an automatic process using a two-axis
calibration machine, in order to guarantee accuracy. This system provides a reference
for angular rate and acceleration to better than 0.0003°. A calibration certificate
is delivered with each MRU to confirm its accuracy within the specified limits.
In addition to this certificate, all MRUs are delivered with two year warranties.
Alongside the MRU D and MRU Z, we have also released a new version of our Windows
based MRU configuration software, ‘MRC’. This release features the option for installation
in hydrographic mode, which enables users to select between predefined configurations
for the most common echosounders on the market. This makes the interfacing of MRU
signals a much easier task than before.