881A Imaging

Model 881A
Digital Multi-Frequency Imaging Sonar

Now with Multi-frequency Sonar, operators can generate highly detailed full-scale images with just one unit.  The 881A is a programmable multi-frequency digital imaging sonar that you can operate using default frequency settings or customize the configurations for your own situation.  High performance, lower cost, low power and simple set-up and installation, make this sonar perfect for the largest ROV’s to the smallest inspection ROV’s, plus AUV or UUV applications.

881A Imaging

Underwater Hardware Specifications

Frequency

310 kHz, 675 kHz, or 1 MHz (default settings)
-Other frequencies can be selected through programmable software configurations
(Tunable from 280 kHz to 1.1 MHz in 5 kHz steps)

Transducer

Imaging type, fluid compensated

Transducer Beam Width

310 kHz:  4° x 40°
675 kHz:  1.8° x 20°
1 MHz:  0.9° x 10°

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 5 Watts

Dimensions

(for both depth ratings)
79.4 mm (3.125") diameter x 182 mm (7.125") length

Weight in Air

1000 m unit:  1.5 kg (3.3 lbs)
3000 m unit:  2 kg (4.4 lbs)

Weight in Water

1000 m unit:  0.6 kg (1.3 lbs)
3000 m unit:  1.1 kg (2.4 lbs)

Materials

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

Finish

Hard Anodize

Software Specifications

Win881A.exe

v3.01

Windows™ Operating System

Windows™ XP, Vista, 7, 8, 10

Modes

Sector, Polar and Side Scan

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, 150 m, 200 m

Train Angles

Continuous rotation, 3° increments

Sector Size

Sector Mode:  0° – 180°, 3° increments
Polar Mode:  0° – 357°, 3° increments, or Continuous rotation

Step Sizes

Slow (0.3°), Medium (0.6°), Fast (0.9°), Faster (1.2°), Fastest (2.4°)

Grid Types

Polar and rectangular

File Format

(filename).81a

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

881-000-400

3000 m unit

881-000-401

RS-232

Option               -006

End mount connector

Option               -009

Right angle connector

Option               -010

Interface source code in "C" (TEST881A.C)

Option               -018

881A Imaging

Features

  • Programmable
  • Multi-frequency
  • High performance
  • Lower cost
  • Low power
  • Simple set-up and installation
  • Digital telemetry
  • Full scale range from 1 m to 200 m
  • Compact size
  • Communication format available to user

Applications

  • ROV, AUV, & UUV
  • Offshore Oil & Gas
  • Sunken Timber Recovery
  • Diving Support
  • Surveying
  • Search & Recovery
  • Inspection
  • Underwater Archaeology
  • Scientific Research

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