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.
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