Klein System 4K-UHR

The KLEIN 4K-UHR is the latest product in Klein’s series of Professional Survey Side Scan Sonars.

Designed specifically with Klein’s innovative focused transducer technology to deliver Ultra-High Resolution surveys with improved range performance and motion tolerance. Produces MHz-type resolution without sacrificing range performance.

HIGH and ULTRA-HIGH RESOLUTION simultaneous modes of operation with optimized range and resolution-dependent configurations.

Tru-Bottom™ tracking reduces data processing overhead, with a dedicated altimeter for optimized bottom tracking.

Klein’s innovative focused transducer technology provides:

  • Greatly improved along-track resolution comparable to sonars with much higher frequencies.
  • 33% greater operational range over higher frequency competitor sonars.
  • Klein’s motion-tolerant transducer design produces up to a 30% improvement in along-track resolution compared to competitor sonars.

Compliant for Offshore Renewable/Oil/Gas, BOEM, NOAA, USACE & IHO specification surveys.

Key Features

  • Dual-mode operation:
    Focused Transducer High Resolution/Ultra-High Resolution (600/900 kHz)
  • Enhanced motion tolerance
  • Depth rated 300m
  • Accurate target positioning
  • Tru-Bottom™ Tracking


  • Offshore Renewable and Oil & Gas Survey
    (UXO, hazard and boulder detection surveys)
  • Engineering Site Surveys
  • High-resolution Hydrographic Charting Survey
  • High-resolution Search & Recovery Surveys