Underwater Epoch 4 Ultrasonic Flaw Detector

Underwater Epoch 4 Ultrasonic Flaw Detector – Available for rental, hire and ex-rental purchase from Ashtead Technology.

Designed and built to Ashtead Technology's exacting specifications, the new Underwater Epoch 4 Ultrasonic Flaw Detector combines all the features of the Epoch 4 flaw detector with a brand new sub-surface capability. Simple to operate yet highly advanced, this flaw detector brings advanced digital Non-Destructive Testing and DAC functions to new applications in the Offshore Industry. Designed to be controlled solely from topside using Ashtead's proprietory Epoch Remote Control software, the A-Scan display is visible to both the diver on the electroluminescent screen and to the topside operator via the umbilical and LCD monitor.

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

Key features

  • Fully topside controlled, including DAC functions
  • Renowned Olympsu NDT Epoch 4 technology
  • Rugged design and construction
  • Built-in data storage and manipulation
  • User-friendly operation and software
  • Additional safety features, including an internal pressure relief valve

Technical specifications

Diver Unit
Display:320 x 240 pixels, Electroluminescent
Units:Metric or Microseconds
Material Velocity:0.025 to 0.6000 in/µsec (635 to 15240 m/s)
Range:Standard 0.38inch to 400inch (1mm to 10,000mm)
Distance Readout:Single echo or echo-to-echo thickness readings, soundpath, surface and depth display.
Pulse Energy:Low(100V), Medium(200V), High(300V) and Max(400V)
Alarms:Selectable threshold positive/negative or minimum depth modes
Memory:Standard Memory: 500 waveforms, or, 10,000 thickness readings
Umbilical Length:Up to 250metres
Maximum Depth:500 metres
Pressure Relief:Internal / External valve
Power:24V DC from topside interface
Topside Interface:
Power:85 - 265V AC (47-65Hz) Auto Selecting
Safety Features:5A miniature cicuit breaker & 10mA RCD
VGA Output:Allows viewing of A-Scan display on LCD monitor (supplied with kit)
Communications Port:RS-232 port allowing interface with laptop/Epoch remote control software
Output:24V DC for Diver Unit


42 x 42 x 56cm (including frame)16.8 x 16.8 x 22.4 inches25kg (in air)55lbs
25.5 x 47cm (excluding frame)10 x 18.8 inches