MRU Ex
The MRU Ex is a compact and cost-effective solution for hazardous areas including all Ex certificates
MRU Ex
The MRU Ex is a compact and cost-effective solution for hazardous areas including all Ex certificates
Roll and pitch dynamic accuracy of 0.05° Heave accuracy: 5 cm / 5 %
The 6000 series provides high performance 0.02° roll and pitch accuracy
The 9000 series achieves exceptional precision with 0.01° roll and pitch accuracy
The MRU Ex is a cost-effective solution for hazardous areas. Easy to install with pigtail cable and including all certificates and documentation.
• Ex certificate II 2 G Ex d lIC Gb
• Compact and cost effective unit
• Stainless steel unit
• Ethernet & serial line
• Including pigtail cable in custom lengths
The MRU Ex comes in three different versions: 3000, 6000 and 9000 models to accommodate for different accuracy requirements and budgets.
The MRU Ex is also available in an inclinometer version of the MRU that does not include Heave/Surge/Sway outputs.
High accuracy roll, pitch and heave, even in irregular sea states
Ex certificate II 2 G Ex d lIC Gb
Low weight and small footprint enable installation almost anywhere
Experience enhanced efficiency and performance with MRU Insight. Analyze, visualize, and integrate your motion data effortlessly, gaining valuable insights. From real-time monitoring to comprehensive reporting, MRU Insights revolutionizes MRU data utilization for informed decision-making, enhanced safety, and improved performance. Elevate your marine operations with MRU Insights and unlock the full potential of your MRU investment.
| Roll & Pitch | 0.05° (3000 series) - 0.02° (6000 series) - 0.01° (9000 series) - RMS (dynamic) |
| Heave (real time) | 5.0 cm or 5.0 % - Whichever is greater for 0 to 25 s periods, valid for irregular motions in real sea conditions. |
| Ports | Ethernet & RS-232 / Ethernet & RS-485 |
| Communication | TCP, UDP, Modbus TCP, ethernet/IP |
| Protocols | NMEA, ASCII, Binary TSS1, MDL, Atlas, Simrad EM 3000, NORSUB, Custom, etc. ++. See protocol list. |
| Output frequency | 0-100 Hz |
| Connector | Pigtail cable 10-wire |
| Depth rating | IP65 |
| Dimensions | 190 x 190 x 205 mm |
| Weight | 15 kg excl pigtail cable |
| Casing material | AISI 316L |
From bathymetric surveys to subsea inspections and wave radar systems, our MRUs have been put to work in a wide range of challenging environments during 2025. As the year draws to a close we take a quick look back at some of the highlights, applications, and collaborations that helped shape another strong year of progress for Norwegian Subsea.
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Helideck Motion Monitoring & Weather Data Systems (HMS) provide real-time motion and environmental data essential for flight planning and for pilots to remain in safe control during take off and landing from moving helidecks.
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Norwegian Subsea has returned from a successful trip to Shanghai, where our compact Motion Reference Units (MRUs) drew strong interest from across the Chinese maritime supply chain during the Marintec China 2025 exhibition. As one of the world’s leading maritime events, Marintec provided an ideal platform to engage with shipbuilders, integrators and equipment manufacturers in a region where innovation and scale go hand in hand.
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