837B Delta T 1000 m Profiling

The Imagenex Model 837B “Delta T” is a multiple receiver sonar system designed to provide video-like imaging with all the advantages of underwater sonar.  Innovative digital signal processing is used to optimize data usage from all channels to achieve the best possible resolution at every point in the field of view.  Recent advances in computing power have made it possible to transfer and process this data at resolutions equal to computer monitor resolution, and with image frame rates of better than 20 frames per second!

The Delta T system has been designed from the ground up with the most advanced, high accuracy, low power electronic components available to provide breakthroughs in system power consumption, package size, and price.  This advanced electronics package has built in flexibility and programmability to accommodate a wide range of transducer arrays.  Thus, the Delta T is the first in a family of new technology products which will have imaging and profiling capabilities to suit your underwater application.  Imagenex sonars:  advancing underwater imaging capability for the everyday user.

837B Delta T 1000 m Profiling

Underwater Hardware Specifications


260 kHz

Transducer Beam Width

Receive:  120° x 3°
Transmit:  120° x 3° 

Effective Beam Widths

3°, 1.5°, 0.75° 


120, 240, 480

*Data is acquired at full resolution every shot:  processing the data for screen display on a PC can slow the system at highest number of beams.  120 beam mode is recommended for real time data acquisition.  The data can then be played back at highest resolution (480 beam).

Range Resolution

Screen: 0.2% of range
Output: 0.02% of range

Min. Detectable Range

0.5 m

Max. Operating Depth

1000 m 

Frame Rate

Up to 20 fps

Interface to PC

Standard:  10 Mbps Ethernet (10 BASE-T) using TCP/IP

Bit rate may vary if an Ethernet extender is in use. 

Max. Cable Length

Standard:  100 m on CAT5e

Cable length may be increased up to ~9000 m using an Ethernet extender. Please enquire for more information. 


End mounted, 8 conductor, wet mateable (Subconn MCBH8M-AS or MCBH8M-SS)
Optional right angle connector

Power Supply

22 – 32 VDC at less than 5 Watts


See Drawing

Weight in Air

Aluminum unit:  ~2.4 kg (5.5 lbs)
Stainless Steel unit:  ~5.2 kg (11.5 lbs)

Weight in Water

Aluminum unit:  ~1.1 kg (2.5 lbs)
Stainless Steel unit:  ~3.8 kg (8.5 lbs)


Aluminum unit:  6061-T6 Aluminum, Epoxy, PVC, Aluminum connector
Stainless Steel unit:  316 Stainless Steel, Epoxy, PVC, Stainless Steel connector


Hard Anodize (Aluminum unit only)

Software Specifications


Windows™ Operating System

Windows™ XP, Vista, 7, 8, 10

Display Modes

Sector, Linear, Perspective, Profile, Beam Test 

Persistence (Trail)

1 – 300 seconds 

Range Scales

5 m, 10 m, 20 m, 30 m, 40 m, 50 m, 60 m, 80 m, 100 m 

Sector Sizes

30°, 60°, 90°, 120° 

File Format

Raw Data:  (filename).837
Profile Point:  (filename).83P

Recommended Minimum Computer Requirements

2 GHz Pentium 4
256 MB RAM
20 GB Hard Disk
1024 x 768 screen resolution 

Ordering Information

1000 m Unit in Aluminum


1000 m Unit in Stainless Steel


Right Angle Connector

Option               -010

IP Address*

Option               -020

*Note:   Standard IP Address is
            A different IP Address may be specified upon ordering.

675 kHz

Option               -022

External Trigger

Option               -023

Dual Head Software

Option               -024

Pitch, Roll, & Heading Sensor

Option               -029

837B Delta T 1000 m Profiling


  • Programmable
  • High speed
  • High performance
  • Lower cost
  • Low power
  • Simple set-up and installation
  • Ethernet
  • 5 m to 100 m range scales
  • Integrated Video Capture and Display
  • Built in GPS Track Plotter


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

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