Wavefront Systems – Making the Underwater World Visible

Sentry IMS – Integrity Monitoring Sonar

Sentry IMS – Over one billion cubic feet of seawater monitored continuously.

When deployed around your crucial seabed assets, Wavefront’s field-proven hydrocarbon and CCS Integrity Monitoring Sonar – Sentry IMS – is designed to continuously check billions of cubic feet of seawater around the sensor for signs of containment issues.

Sentry IMS has been developed to automatically warn of integrity breaches connected to subsea oil and gas installations and equipment. Sentry IMS can monitor over a billion cubic feet of seawater in a 360° envelope from a single monitored location.

Sentry Integrity Monitoring Sonar (IMS)
Speak to an expertView Sentry image gallery

Sentry at a glance

  • Developed using our detection, localisation and classification sonar technology, tried, tested and trusted throughout the offshore sector
  • With 360° coverage and high volumetric monitoring capabilities from a single location, the Sentry IMS sonar leak detector can detect the smallest of leaks at ranges in excess of 500 meters
  • Automated operation with a low false alarm rate means there’s no need for constant oversight
  • Integrity breaches are localised to a few metres the moment they are detected
  • Easy to deploy and recover via ROV, Sentry IMS is perfect for short monitoring projects

Sentry Sonar is suitable for:

Environmental baselining

Leak detection

Carbon capture and storage

Sentry Sonar
Sentry does not require a trained sonar expert to adjust the sonar parameters. It has been designed to provide robust, reliable detection in all conditions.
Multiple sonar heads can be interfaced together to increase coverage area.
Manufactured from Grade 5 titanium makes Sentry suitable for permanent installation. Data is transferred back to a control room via single mode fibre-optic cable.
Sonar heads can be powered locally from a tieback or powered by a local subsea battery pack.
Sentry Sonar
Sentry does not require a trained sonar expert to adjust the sonar parameters. It has been designed to provide robust, reliable detection in all conditions.
Multiple sonar heads can be interfaced together to increase coverage area.
Manufactured from Grade 5 titanium makes Sentry suitable for permanent installation. Data is transferred back to a control room via single mode fibre-optic cable.
Sonar heads can be powered locally from a tieback or powered by a local subsea battery pack.

Benefits of Sentry for your asset monitoring operations

Active

An active sonar, Sentry IMS works by projecting a high bandwidth pulse over a short duration, into the water. It listens for echoes from any objects such as ROVs, structures or hydrocarbon leaks.

Automatic

Each system is fully automated, so if a hydrocarbon discharge is detected, the alarm is raised. Data on the leak position is displayed and transmitted automatically to your remote sonar monitoring stations.

Flexible

With wired and battery-powered configurations, Sentry IMS provides flexibility for how the system is used. Onshore remote access enables easy configuration and monitoring.

Sentry IMS Overview

Sentry’s 360° field of view provides a detection coverage radius of up to 1200 m, detecting leaks of monophase gas down to flow rates of 0.1 litre per minute, which is the equivalent of around one barrel of oil per day. For monophase oil, it detects up to one litre per minute, the equivalent of ten barrels of oil per day.

Following installation, Sentry IMS is capable of monitoring over one billion cubic feet of seawater around your underwater assets.

There are two configurations of Sentry monitoring available. When mounted on a lander, Sentry-W connects to your asset’s existing communication seafloor infrastructure and power source. It runs autonomously, providing alerts only when the onboard processing picks up a positive detection and classification of a leak. With remote onshore access, Sentry is configurable for multiple users.

Should no infrastructure be available, Sentry-B (a standalone battery-operated system) can be lander-deployed and comes complete with subsea data processing. With flexible preset intervals, or whenever a leak event is detected, an acoustic modem is used to transmit summary data. Satellite communications systems and surface transceivers can be integrated into an Uncrewed Surface Vehicle (USV), positioned over the side of a vessel, rig or floating production system or mounted on a moored buoy.

Mobile leak detection

Integration with our Solstice MAS side scan-sonar allows for the inspection of greater lengths of subsea assets, such as trunk pipelines. Solstice MAS is compact yet high-performing and contains patented automatic target recognition (ATR) algorithms, which can be integrated into an AUV to provide detection and location of any losses of gas or oil.

CCS site monitoring

A significant concern to regulatory bodies, operators and environmental groups, while viewed as highly unlikely, is containment failure at an offshore Carbon Capture and Storage (CCS) site. To counteract this, we’ve developed the capability to detect and monitor any leakage at high-risk locations. Using a combined Sentry sonar and chemical sensing landers, our products deliver sensitive and reliable automated sonar leak detection capability across wide areas. Contact us to discuss your CCS monitoring requirements.

Why invest in Sentry IMS?

Design

  • Battery-powered and wired Sentry IMS options
  • Fully autonomous alarms
  • Networked multiple sonar heads will increase coverage

Typical System Set Up

  • Sonar or multiple sonar heads
  • Sonar processor (SP)
  • Command workstation (CWS)
  • Sentry IMS software

Support

  • Our projects and applications group work side-by-side with you, from concept to installation
  • All of our systems are manufactured and tested before delivery at our world-class in-house facilities
  • Our highly experienced field personnel are on hand to ensure even the most complex systems are safely commissioned
  • 24-hour support whenever you need us and wherever you are in the world
Contact UsView Sentry image gallery
Contact Us
Contact Form - contact page

Resources

Downloadable Documents (PDF):
Sentry IMS Brochure

Useful links

Downloadable Documents (PDF):
Sentry IMS Brochure

Sentry IMS Image Gallery