Imagenex Model 837A ‘Delta-T’ 3000m Multibeam Profiling Sonar

Available as:
  • Rental
  • Sale (ex rental)

Imagenex Model 837A 'Delta-T' 3000m Multibeam Profiling Sonar – Available for rental, hire and ex-rental purchase from Ashtead Technology.

The Imagenex Model 837 'Delta T' is a multiple receiver sonar system designed to provide high-speed 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. An Ethernet Surface Unit is also available.

Sale Information
Ex-rental unit for sale - sold as seen. Contact us for information.

Key features

  • 5m to 100m range
  • Built in GPS Track Plotter
  • Ethernet
  • High performance
  • High speed
  • Integrated video capture and display
  • Low power
  • Lower cost
  • Programmable
  • Simple set-up and installation


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

Technical specifications

Frequency260 kHz
Transducer Beam Width (nominal)Receive/Transmit: 120° x 3°
Effective Beam Width3°, 1.5°, 0.75°
Beams*120, 240, 480 *Data is acquired at full resolution every shot, 120 beam mode recommended for real-time. Data can then be played back at highest resolution
Range Resolution0.2% of range
Min. Detectable Range0.5m
Max. Operating Depth3000m
Frame RateUp to 20 fps
Interface to PCStandard: 10 Mbps Ethernet (10 BASE-T) using TCP/IP. Bit rate may vary if an Ethernet extender is in use.
Max. Cable LengthStandard: 1000m on CAT5e. Cable length may be increased by using a Fibre Optic mux or by using an Ethernet extender.
ConnectorSide mounted right angle, 8 conductor, wet mateable (Subconn MCBH-8M-SS)
Power Supply22 - 32 VDC at less than 5 watts
Materials6061-T6 Aluminium, Epoxy, PVC, Stainless Steel Connector. Finish - Hard Anodized
Windows (trade mark) Operating SystemWindows XP, Vista
Display ModesSector, Linear, Perspective, Profile, Beam Test
Persistence (Trail)1 - 300 seconds
Range Scales5m, 10m, 20m, 30m, 40m, 50m, 60m, 80m, 100m
Sector Sizes30°, 60°, 90°, 120°
File FormatRaw Data - (filename).837; Profile Point - (filename).83P
Recommended Minimum Computer Requirements2 GHz Pentium 4, 256 MB RAM, 20GB Hard Disk; 1024 x 768 screen resolution


In Air336mm x 107mm x 88mm13.24 x 4.23" x 3.38""3kg7lbs
In Water1.2kg3lbs