Which product model series should I choose?

This depends on your application, requirements and budget.

Here are some general guidelines. We are happy to help you in finding the right MRU type.

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

Which series should I choose?

The 3000 series, with 0.05° accuracy in Roll & Pitch, is ideal for:

Most monitoring applications where the main purpose is to collect motion data for analysis or decision making, such as helideck monitoring systems.
Some instrument compensation applications such as wave radars and wind lidar buoys.
Active heave control (AHC) for winches on smaller vessels with short lever arms to the remote monitoring points

Which series should I choose

3000

The 3000 series, with 0.05° accuracy in Roll & Pitch, is ideal for

Most monitoring applications where the main purpose is to collect motion data for analysis or decision making, such as helideck monitoring systems.
Some instrument compensation applications such as wave radars and wind lidar buoys.
Active heave control (AHC) for winches on smaller vessels with short lever arms to the remote monitoring points

MRU 6000 series

MRU 9000 series

MRU 3000 Series

The 3000 series, with 0.05° accuracy in Roll & Pitch, is ideal for

Most monitoring applications where the main purpose is to collect motion data for analysis or decision making, such as helideck monitoring systems.
Some instrument compensation applications such as wave radars and wind lidar buoys.
Active heave control (AHC) for winches on smaller vessels with short lever arms to the remote monitoring points

MRU 6000 series

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MRU 9000 series

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Which applications can the 3000 series be used for?

Here are some general guidelines.

The 3000 series, with 0.05° accuracy in Roll & Pitch, is ideal for

Most monitoring applications where the main purpose is to collect motion data for analysis or decision making, such as helideck monitoring systems.
Some instrument compensation applications such as wave radars and wind lidar buoys.
Active heave control (AHC) for winches on smaller vessels with short lever arms to the remote monitoring points

Specifications

MRU series

Performance

Roll & Pitch

0.05° (3000 series) / 0.02° (6000 series) / 0.01° (9000 series)
RMS (dynamic & static)

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

Heading (optional)

± 0.5 °
Magnetic heading

Range

Rotation speed

± 150 °/s (3000 series) / ± 450 °/s (6000 series) / ± 450 °/s (9000 series)

Acceleration

± 3 g (3000 series) / ± 4 g (6000 series) / ± 10 g (9000 series)

Heave

± 50 m

Roll / Pitch / Yaw

± 180 ° / ± 90 ° / ± 360 °
(no limits)

Output frequency

0 - 100 Hz
(adjustable output frequencies)

Gyro output

Scale factor error

0.2 % max/min

Angular rate noise

0.050 °/s RMS (3000 series) / 0.025 °/s RMS (6000 series) / 0.015 °/s RMS (9000 series)

Acceleration output

Acceleration noise

0.0025 m/s2 RMS (3000 series) / 0.0020 m/s2 RMS (3000 series) / 0.0015 m/s2 RMS (9000 series)

Acceleration accuracy

0.01 m/s2 RMS

Power & Interface

Power consumption

6 W

Supply voltage

9 - 36 V DC (24 V nominal)

Internal storage

32 GB

Data protocols

Custom NMEA, ASCII and Binary, Atlas, Gyrocompas 1, Ifremer Victor, MDL, NORSUB 1-8, Simrad EM 3000, SMCA, SMCC, Tokimek PTVG, RDI ADCP, TSS1 and many more.

Configuration protocols

GET/SET through telnet, serial port and MRU configurator

Time synchronization

Sync to host PC, Sync to NTP server, Sync to PPS

Features

PPS

PPS time synchronization

Aiding

Heading and velocity aiding
(on request)

Environmental specifications

Electromagnetic compatibility

IEC 60945/EN 60945
(immunity/emission)

Vibration

IEC 60945/EN 60945

Max shock

2000 m/s2 (half-sine 0.5 msec)
non-operational (10 ms peak)

MTBF (computed)

10 000 h

Specifications

Valid for 3000, 6000 and 9000 series

Product description

MRU 3000/6000/9000 series specifications — MRU specifications

Our high accuracy, compact and affordable Motion Reference Units

MRU Compact

Usage area

IP 65

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

RJ45 or RJ50

Learn more

MRU Marine

Usage area

50 m depth, IP 68

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

Lemo or SubConn 8 or SubConn 16

Learn more

MRU Subsea

Usage area

6000 m depth

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

SubConn 8

Learn more

MRU Ex

Usage area

Hazardous areas

Heave accuracy

5 cm or 5.0%

Roll & Pitch accuracy

3000±0.05°
6000±0.02°
9000±0.01°

Connectors

Pigtail cable

Learn more

Download product brochure

Copy of MRU Marine specifics

Environment

Marine: IP68
Marine SW: 50 m water depth
Marine SW16: 50 m water depth

Connector

Marine: Lemo 16 pins
Marine SW: SubConn 8 pins
Marine SW16: SubConn 16 pins

Ports

Marine: Ethernet, RS-232, RS-485 (422), PPS
Marine SW: Ethernet & RS-232, Ethernet & 2-wire RS-485
Marine SW16: Ethernet, RS-232, RS-485 (422), PPS

Communication

Marine: TCP, UDP, Modbus TCP, ethernet/IP, Serial, Modbus RTU
Marine SW: TCP, UDP, Modbus TCP, ethernet/IP
Marine SW16: TCP, UDP, Modbus TCP, ethernet/IP, Serial, Modbus RTU

Protocols

NMEA, ASCII, Binary TSS1, MDL, Atlas, Simrad EM 3000, NORSUB, Custom, ++.

Output frequency

0-100 Hz

Dimensions

154 x 86 x 67 mm

Weight

1.2 kg

Casing material

Marine Anodized Aluminum 6061-T6

Temperature range

Operating/Storage: -40 to +85 °C