What are the specifications and prices of Norwegian Subsea Vertical Reference Units?
Norwegian Subsea offers a range of high-performance Motion Reference Units (MRUs) designed for diverse marine, subsea, and offshore applications. All our MRUs utilize advanced sensor fusion algorithms and state-of-the-art MEMS technology, ensuring high accuracy and reliability validated in real sea conditions. They are available in three accuracy tiers based on Roll & Pitch performance: Series 3000 (±0.05°), Series 6000 (±0.02°), and Series 9000 (±0.01°). Standard heave accuracy across applicable models is 5.0 cm or 5.0%. Our MRUs are designed for easy integration with standard protocols (Ethernet UDP, Modbus TCP, Ethernet/IP, NMEA, etc.) and user-friendly web-based configuration software.
Key specifications vary by model:
* **MRU Compact:** Features an IP65-rated anodized aluminum housing, suitable for indoor or control box mounting. It offers plug-and-play installation via RJ45 or RJ50 connectors with passive Power over Ethernet (PoE). Dimensions are 12.0 cm × 5.7 cm × 5.3 cm, weighing 0.55 kg.
* **MRU Marine:** Housed in IP68-rated anodized aluminum (or optionally rated for 50m water depth as MRU Marine SW). It provides versatile connectivity via marine-grade connectors (pigtail or Subconn options) supporting Ethernet, RS-232, RS-485, and PPS. Dimensions are 15.4 cm × 8.6 cm × 6.7 cm, weighing 1.2 kg.
* **MRU Subsea:** Features a robust titanium housing depth-rated to 6000 meters, ideal for ROV/AUV integration and deep-water surveys. It uses an 8-pin Subconn wet-mateable connector for Ethernet and serial communication. Dimensions are 7.6 cm × 7.6 cm × 16.5 cm, weighing 1.6 kg.
* **MRU Ex:** Designed for hazardous areas with an Ex certificate (II 2 G Ex d IIC Gb). It features a stainless steel (AISI 316L) enclosure and pigtail cable connection for Ethernet and serial lines. Dimensions are 19 cm × 19 cm × 20.5 cm, weighing 15 kg (excluding cable).
All models can be mounted in any orientation and are available in Inclinometer/VRU versions (without Heave/Surge/Sway). They typically do not require recalibration during their lifetime for most applications.
While specific pricing depends on the chosen model, accuracy series, and configuration options, Norwegian Subsea MRUs are designed to be highly cost-effective. Our focus is on providing high performance and reliability at an affordable price point, reducing both upfront investment and long-term maintenance costs. They are also ideal for cost-effective retrofitting of older systems. For detailed pricing and a formal quotation tailored to your requirements, please contact Norwegian Subsea directly.
