Full Frequency Programmability
Supports multiple preset frequencies and custom tuning from 280 kHz to 1.1 MHz in 5 kHz steps, allowing imaging modes to adapt to specific needs.

The Imagenex 881A series is an advanced digital multi-frequency imaging sonar, with its core advantage lying in its wide-band programmability. Users can operate at default frequencies such as 310 kHz, 675 kHz, or 1 MHz, or finely tune the frequency from 280 kHz to 1.1 MHz in 5 kHz steps, allowing seamless switching from wide-area reconnaissance to high-resolution imaging.
This sonar series integrates high performance, low power consumption, small size, and high cost-effectiveness. It supports digital telemetry and has an imaging range covering 1 meter to 200 meters. Available in three pressure ratings of 1000m, 3000m, and 6000m, it can be fully adapted to various underwater platforms, from large work-class ROVs to small observation-class ROVs, as well as AUVs/UUVs. It meets diverse underwater detection needs with its flexible configuration and outstanding cost-performance ratio.

Supports multiple preset frequencies and custom tuning from 280 kHz to 1.1 MHz in 5 kHz steps, allowing imaging modes to adapt to specific needs.
Available in three pressure-rated models: 1000m (aluminum housing), 3000m and 6000m (titanium housing), suitable for various operating environments from continental shelf to hadal zone.
Excellent range resolution, reaching 2mm on the 1-4m range scale.
Range 1-200 meters, adjustable in 15 steps; software supports multiple display modes including sector, polar, and side scan.
Power consumption less than 5 watts, compact structure, easy to integrate and install.
Standard RS-485 interface (RS-232 optional), supports cable lengths up to 1000 meters.

Provides real-time acoustic vision for ROVs, AUVs, and UUVs for navigation, observation, and operational support.
Used for condition inspection and survey of underwater pipelines, cables, pile foundations, and other structures.
Efficiently locate underwater lost objects such as shipwrecks, containers, and black boxes.
Used for seabed topographic mapping, shipwreck archaeology, and marine ecological environment research.
Aids in locating submerged timber or other valuable targets.
Provides underwater situational awareness for divers in low visibility environments.
| Specification Parameters | 881A (1000m Model) | 881A (3000m Model) | 881A (6000m Model) |
| Maximum Operating Depth |
1000 m |
3000 m |
6000 m |
| Housing Material | 6061-T6 Aluminum & Polyurethane | Titanium, Polyurethane & 300 Series Stainless Steel | Titanium & Polyurethane |
| Dimensions (Diameter × Length) |
79.4 mm × 182 mm |
79.4 mm × 182 mm |
88.9 mm × 225 mm |
| Weight (in Air) |
1.5 kg |
2.0 kg |
~3.1 kg |
| Weight (in Water) |
0.6 kg |
1.1 kg |
~1.8 kg |
| Connector |
Subconn MCBH4M-AS |
Subconn MCBH4M-AS |
Subconn MCBH4M-Ti |
| Surface Treatment | Hard Anodized | Hard Anodized | None |
| Operating Frequency | 310/675/1000 kHz (default), 280-1100 kHz (adjustable in 5 kHz steps) | ||
| Beam Width |
310 kHz: 4° x 40°;675 kHz: 1.8° x 20°;1 MHz: 0.9° x 10° |
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| Range Scale | 1 meter to 200 meters (multiple adjustable ranges) | ||
| Range Resolution | 1-4m: 2mm; 5m and above: 10mm | ||
| Minimum Detectable Range |
150 mm |
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| Communication Interface | RS-485 @ 115.2 kbps (standard), RS-232 optional | ||
| Power Requirements | 20-60VDC, power consumption <5 watts | ||