881A Echo Sounder

Model 881A
Digital Echo Sounder

The Imagenex Model 881A Echo Sounder is a completely self-contained echo sounder with a serial output.  It is mounted in a pressure-proof housing with an underwater connector for use in depths up to 3000 meters (10000 feet).  It can be used as a standard echo sounder or with digitized first returns only.  Its requirements are minimal, needing only a power source and a digital interface to an external device such as a personal or laptop computer.

881A Echo Sounder

Underwater Hardware Specifications

Frequency

675 kHz

Transducer

Conical

Transducer Beam Width

10° (Standard)

Range Resolution

1 m - 4 m:  2 mm (0.08")
5 m & up:  10 mm (0.4")

Min. Detectable Range

150 mm (6")

Max. Operating Depth

1000 m and 3000 m available

Max. Cable Length

1000 m on typical twisted shielded pair (RS-485)

Interface

RS-485 serial interface @ 115.2 kbps (or optional RS-232)

Connector

Side mounted, four conductor, wet mateable (Subconn MCBH4M-AS)
Optional right angle or end mount connector

Power Supply

20 - 36 VDC at less than 3 Watts

Dimensions

(for both depth ratings)
79.4 mm (3.125") diameter x 139 mm (5.5") length

Weight in Air

1000 m unit:  1.1 kg (2.3 lbs)
3000 m unit:  TBA

Weight in Water

1000 m unit:  TBA
3000 m unit:  TBA

Materials

1000 m unit:  6061-T6 Aluminum & PVC
3000 m unit:  Titanium, PVC & 300 series stainless steel

Finish

Hard Anodize

Software Specifications

Win881AE.exe

v2.00

Windows™ Operating System

Windows™ XP, Vista, 7, 8, 10

Modes

Echosounder

Range Scales

1 m, 2 m, 3 m, 4 m, 5 m, 10 m, 20 m, 30 m, 40 m, 50 m, 60 m, 80 m, 100 m

File Format

(filename).81g

Recommended Minimum Computer Requirements

100 MHz Pentium
16 MB RAM
1 GB Hard Disk
800 x 600 x 256 colour graphics

Ordering Information

1000 m Unit

881-000-141

3000 m unit

881-000-142

RS-232

Option               -006

End mount connector

Option               -009

Right angle connector

Option               -010

881A Echo Sounder

Features

  • Programmable
  • High performance
  • Low power
  • Simple set-up and installation
  • Digital telemetry
  • 1 m to 100 m operation
  • Compact size
  • Communication format available to user

Applications

  • ROV, AUV, & UUV
  • Offshore Oil & Gas
  • Surveying
  • Underwater Archaeology
  • Scientific Research

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