Ultracompact scanning sonar for high resolution profiling with a multi-frequency cone beam transducer.
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The MRS900P series redefines the standard for high-performance underwater profiling by combining advanced technology with affordability. Designed for precise profiling of underwater structures such as pipelines and subsea installations, this sonar series offers reliability, accuracy, and cost-effectiveness for demanding underwater operations.
With its 2-degree cone-beam transducer, the MRS900P series provides sharp, accurate imaging for detailed profiling tasks. The multi-frequency capability (850 kHz, 700 kHz, and 580 kHz) enhances operational flexibility, allowing users to select the optimal frequency for high-resolution or long-range measurements.
The series is available in three depth-rated models: MRS900P (2000m), MRS900LP (1000m), and MRS900SP (300m). These options make it adaptable to a wide range of underwater environments, from shallow coastal waters to deep-sea operations. Weighing just 500g, the lightweight design ensures easy deployment on various platforms, including ROVs, AUVs, and USVs.
Features
- Most compact profiling sonar in the market, weighing only 500g.
- High-resolution profiling with a piezo-composite broadband cone-beam transducer.
- Advanced digital CHIRP technology for superior resolution and image clarity.
- High-performance profiling with a precise 2-degree cone-beam transducer.
- Multi-frequency operation (850 kHz, 700 kHz, 580 kHz) for tailored performance.
- Non-contact rotational scanning mechanism for frictionless and reliable operation.
- Versatile depth ratings of 2000m, 1000m, and 300m to suit diverse needs.
- Lightweight and compact design, ideal for easy integration.
- Durable and reliable in challenging underwater environments.
| Pulse Type | Chirp, CW |
| Operating Frequency | 850 kHz, 700 kHz, 580 kHz |
| Beam Pattern | Cone beam 850 kHz: 2.0° 700 kHz: 2.4° 580 kHz: 2.7° |
| Min. range | 30 cm |
| Max. Range | 60 m |
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| Scanning Angle | Adjustable up to 360° |
| Scan Angle Resolution | 6.4sec / 360° @ range 10m, scan resolution 0.9° |
| Scanning Speed | @Imaging mode, 921,600 baud rate, 100 kHz sampling freq.
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| Transmitting Pulse Length | 500 us (chirp), 10 - 100 us (CW) |
| Interface | RS232 / RS485 Baud rate up to 1 M |
| Power Requirements | 12 - 60 V DC, 4 W max. |
| Max Cable Length | 300 m @ baud rate 1 M, 1 km @ baud rate 115,200 |
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What is the MRS900P Profiling Sonar designed for?
The MRS900P series is an ultra-compact mechanical profiling sonar designed for high-resolution profiling of underwater structures and seabed features.
Typical applications include:
- pipeline / cable profiling
- scour monitoring
- subsea structure inspection
- sediment profile monitoring
- underwater asset monitoring
It is optimised for applications requiring precise cross-sectional or radial profiling rather than forward-looking navigation imaging.
How does profiling sonar differ from standard scanning sonar?
Unlike a conventional fan-beam imaging sonar, the MRS900P uses a narrow cone-beam transducer to produce highly precise radial profile measurements.
This makes it better suited for:
- dimensional profiling
- structure cross-section measurement
- accurate geometric monitoring
- repeatable monitoring of structural changes over time
What beam characteristics does the profiling sonar provide?
The MRS900P uses a cone-beam transducer with very narrow beam angles:
- 850 kHz: 2.0°
- 700 kHz: 2.4°
- 580 kHz: 2.7°
This narrow cone beam enables highly accurate and repeatable profiling measurements.
Why does the profiling sonar use multiple frequencies?
The MRS900P offers selectable frequencies:
- 850 kHz → maximum resolution / sharpest profile
- 700 kHz → balanced performance
- 580 kHz → improved range / penetration in difficult conditions
This allows the operator to optimise performance for the environment and target.
What measurement performance does the MRS900P provide?
Typical specifications include:
- Minimum Range: 30 cm
- Maximum Range: 60 m
- Range Resolution: up to 7.5 mm
- Scanning Angle: adjustable up to 360°
This enables precise short-to-medium range profiling.
How compact is the MRS900P?
The MRS900P is one of the most compact profiling sonars on the market, weighing approximately 500 g class depending on model.
Its compact design makes it ideal for integration into:
- ROVs
- AUVs
- USVs
- fixed monitoring frames
What makes the rotational mechanism reliable?
The MRS900P uses a non-contact rotational scanning mechanism.
Benefits include:
- frictionless operation
- reduced wear
- lower maintenance requirements
- improved long-term reliability compared with contact-based rotating systems
What interfaces does the system support?
The MRS900P supports:
- RS232 / RS485 communication
- Baud rate up to 1 Mbps
For Ethernet-based systems, the sonar can also be integrated via Echologger's TU-E2S Ethernet Converter, enabling:
- TCP/IP communication
- IP-based network deployment
- Integration with Ethernet-enabled ROV, AUV, and robotic platforms
The system also supports open API / developer integration, simplifying OEM and robotics integration.
What depth-rated versions are available?
The MRS900P series is available in multiple pressure-rated versions:
- MRS900SP → 300 m
- MRS900LP → 1000 m
- MRS900P → 2000 m
This allows selection based on deployment depth requirements.
When should I choose profiling sonar instead of imaging sonar?
Choose profiling sonar when your priority is:
- accurate structural measurement
- repeatable dimensional monitoring
- cross-sectional / radial profiling
- precise scour or sediment profile monitoring
Choose standard imaging sonar when your priority is:
- situational awareness
- navigation
- obstacle avoidance
- broad scene visualisation
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