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Supporting the industry to lower risk, reduce costs and protect the environment.

Sentinel Subsea specialises in providing advanced passive integrity monitoring solutions for subsea infrastructure and equipment.

Operating assets in a marine environment can often be complex and challenging. With transformative passive technologies, Sentinel Subsea delivers continuous subsea monitoring solutions that lower risk, reduce costs and protect the environment.

Led by a team of industry experts, Sentinel Subsea was established with a fundamental philosophy - to remove the complexity from monitoring subsea assets. Our easy to deploy passive systems are designed to operate without the need for active power subsea, routine system checks or data communication to the surface.

Developed in collaboration with the key industry stakeholders, Sentinel Subsea’s proprietary technology was created with the aim to support the energy industry and its commitment to cost-efficient, environmental stewardship.

WellSentinel™ - passive well integrity monitoring

Innovative passive technology designed to continuously monitor the integrity of subsea wells, wellheads and Xmas trees.

Sentinel Subsea’s passive well technology continuously monitors the integrity of subsea wells and repurposed carbon capture sites. WellSentinel™ offers a proven method of long-term remote well monitoring while reducing risk and removing complexity. Once deployed, our systems rapidly identify any unwanted loss of containment (LoC) and transmit an alert signal via iridium satellite.

The system provides the owners of subsea assets with the opportunity to demonstrate a real commitment to minimising the risk of any unforeseen leaks and protecting against environmental impact.

Our suite of technologies can be applied across all stages of the well lifecycle, detecting leaks at any stage from exploration, development, production, late-life, decommissioning and re-use (carbon capture & storage).

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Lower risk

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Reduce costs

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Protect the environment

The team

With over a hundred years’ experience, our expertise lies in the development, launch and deployment of subsea well technology product lines.

“We founded Sentinel Subsea because we truly believe we have developed a transformational technology that provides reliable and continuous real time asset integrity assurance. At the same time the technology reduces the cost of current monitoring techniques and massively reduces the carbon footprint associated with existing methods.”

Neil Gordon

Sentinel CEO


Sentinel Subsea announced as finalist in 2023 OAA
Sentinel Subsea announced as finalist in 2023 OAA

Sentinel Subsea, passive well integrity monitoring specialist, has been announced as a finalist in the

Meet Robert!
Meet Robert!

Beginning his journey with Sentinel in June of this year, Robert joins us with over 20 years’ cross-industry

Reduce risk, lower cost, and protect the environment
Reduce risk, lower cost, and protect the environment

How WellSentinel™ technology is supporting operators transition to a more sustainable future.

Sentinel Subsea Continues Business Expansion
Sentinel Subsea Continues Business Expansion

Sentinel Subsea announces the appointment of two non-executive board positions, reflecting the company’s