An GIF of RAIS' EDRIS Vessel Scanner performing an inspection

EDRIS Vessel Scanner

Sonomatic has developed an End Dome Robotic Inspection System (EDRIS). This miniature scanner revolutionises the inspection process by eliminating the need for manned entry. With its advanced deployment system, the scanner can be easily attached to the skirt, allowing for seamless deployment to the domed end. Currently, the scanner is equipped with a video-tracked corrosion mapping inspection technique, but we are continuously developing and engineering alternative attachments and inspection tooling in collaboration with our clients.

Developed to support NII of vertical pressure vessels, one of the most critical areas to inspect in vertical pressure vessels is the bottom head, particularly the domed end. This area is highly susceptible to corrosion due to fluid movements caused by differential pressure. Traditionally, inspecting these locations can be challenging, as the skirt is welded to the tangent line of the head, creating an inaccessible area or requiring confined space entry. However, Sonomatic has successfully addressed this issue with the development of the EDRIS Scanner, ensuring efficient inspection that meets the Non-Intrusive Inspection (NII) requirements for vertical pressure vessels.

An image of RAIS' EDRIS Vessel Scanner performing an inspection

EDRIS safety benefits are the reduced risk of confined space entry, historically personnel would be required to enter the confined space with conventional NDT methods to complete the intrusive inspection requirements.

  • Exceptionally small size and profile to maximise coverage for remote automated scanning.
  • Data suitable for use in statistical analysis as part of NII justification.
  • Remote inspection for areas of restricted access.
  • Fully steerable plus ability to turn on own axis.


Initially developed to support NII of vertical vessels where personnel entry was not possible, it can also be used in situations where personnel entry into confined spaces is undesirable on safety grounds. EDRIS can be deployed through a 6” skirt opening and deployed by a fleet of three vehicles – observation, delivery and data collection.

The strong magnets located in the scanner body combined with rubber wheels avoids damage to paint. It can be driven under joystick or programmable control and it has potential uses for other remote robotics applications.

A close-up look at the RAIS EDRIS Vessel Scanner
General Features:
  • Minimum access hole 150mm diameter.
  • Fully remote operation and deployment allows inspection within potentially dangerous areas.
  • Probe head adjustment to diameter.
  • Live data collection.
  • Fully manual (joystick) and automated scanning.
  • Dual torsion spring probe assembly ensures good data collection on undulating surfaces.
  • Probe protected within deployment unit for safe deployment.
An image showcasing the size dimensions of the RAIS EDRIS Vessel Scanner
  • Rugged and compact design for tight access areas.
  • Integrated water/couplant management.
  • Profiled probe shoe allows scanning in close proximity to nozzle.
  • Ability to operate on dome vessels – minimum 800mm diameter.
  • Vulcanized rubber wheels to aid grip.
  • Tested to maintain contact on paint thickness’s up to 1mm.
  • Corrosion mapping for NII with accurate and repeatable thickness measurement.

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