Deteqt Raises A$5M Seed Round to Advance Chip-Scale Quantum Magnetometer for Marine and Defence Applications

Australian deep tech company Deteqt has closed a A$5 million seed round led by Main Sequence, with participation from ATP Fund, BOKA Capital, Beaten Zone Venture Partners, Uniseed, and the University of Sydney, to develop one of the world's most compact quantum magnetic sensors. The chip-scale quantum magnetometer, combining an engineered diamond crystal with a custom semiconductor chip, targets GPS-denied navigation for defence platforms and marine and subsea sensing applications including submarine detection, pipeline inspection, and unexploded ordnance identification.

 

Technology Architecture and Operating Principle

 

Deteqt's core technology is a chip-scale quantum magnetometer that uses atomic-scale quantum defects engineered into a diamond crystal. When illuminated with laser light, these defects emit an optical signal that changes in response to the surrounding magnetic environment, allowing the system to measure magnetic fields with extremely high sensitivity. The key commercial advance is the integration of this capability into a compact semiconductor platform suited to scalable manufacturing, which addresses the primary barrier to wider deployment of quantum magnetic sensing. Previous quantum magnetometer systems have been physically large, expensive, and confined to controlled laboratory or clinical environments such as MRI machines and brain imaging equipment. The chip-scale integration changes that constraint fundamentally, enabling deployment in drones, autonomous vehicles, robots, and distributed sensing arrays.

 

Marine and Subsea Applications

 

Marine and subsea environments represent one of Deteqt's most important application focus areas, because GPS signals do not penetrate underwater, making alternative navigation approaches essential for subsea autonomous vehicles, remotely operated platforms, and other underwater systems. Magnetic sensing provides a navigation reference that is independent of satellite infrastructure, which is critical for long-duration missions in GPS-denied underwater environments. Beyond navigation, the technology has potential applications in magnetic anomaly detection of large metallic objects including submarines, pipelines, and unexploded ordnance, which are high-value detection targets across both commercial and defence contexts. The ability to deploy compact sensor arrays across marine platforms and distributed sensing networks is central to Deteqt's longer-term commercial vision for the underwater domain.

 

Defence and GPS-Denied Navigation Market

 

The company's lead application is GPS-denied navigation for defence platforms, where signal jamming in contested environments has created urgent and immediate demand for alternative positioning technologies. The geopolitical environment in recent years has elevated the operational importance of systems that can navigate reliably without dependence on satellite infrastructure, and compact quantum magnetometers capable of detecting and following the Earth's magnetic field gradient provide one of the more credible positioning alternatives available at the chip scale. The involvement of Beaten Zone Venture Partners in the seed round reflects specifically defence-aligned investor interest in the technology, and the company has indicated accelerating partner demand across Australia and globally.

 

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Field Testing and Robustness Validation

 

Deteqt has completed field testing of a prototype device in an unshielded environment above an active rail corridor characterised by significant vibration and electromagnetic interference, with the prototype successfully detecting magnetic signatures from passing trains. The significance of the test is that it validates the technology's ability to operate in real-world noisy environments rather than only in shielded laboratory conditions, which is a critical step toward commercial deployability. For marine applications, where electromagnetic interference from vessel systems, ocean floor geology, and other sources creates a complex magnetic background, the robustness demonstrated in the rail corridor test provides early evidence that the technology can be engineered for operational use in similarly challenging environments.

 

Compact Arrays and Signal Processing Advantage

 

Rabeau has highlighted that the chip-scale approach enables compact sensor arrays, which in turn allow signal processing techniques to characterise background magnetic effects from the host platform while improving sensitivity to external signals. The array approach is significant because individual magnetic sensors struggle to distinguish signals of interest from the ambient magnetic environment in which they are deployed. By processing signals from multiple spatially distributed sensors simultaneously, array configurations can apply beamforming and spatial filtering techniques that substantially improve detection performance in cluttered magnetic environments. This capability is particularly relevant for subsea mine detection, pipeline integrity monitoring, and submarine tracking, where targets must be detected against complex and variable background magnetic fields.

 

Investor Profile and Commercial Trajectory

 

The seed round was led by Main Sequence, Australia's deep tech venture fund, with participation from ATP Fund, BOKA Capital, Beaten Zone Venture Partners, Uniseed, and the University of Sydney. The participation of the University of Sydney reflects the academic origins of elements of the technology, while the combination of university commercialisation funds, deep tech specialists, and defence-oriented investors provides a well-rounded capital base for a company at this stage of development. The A$5 million will be deployed to advance the field-ready quantum magnetometer toward first commercial deployments and to grow the team to meet accelerating partner demand, with a focus on both Australian and global market opportunities.

 

Implications for Ocean Technology and Marine Sensing

 

The emergence of chip-scale quantum magnetometers with the sensitivity and robustness characteristics that Deteqt is targeting has the potential to open new capabilities in ocean technology. Current magnetic sensing systems for marine applications are typically bulky, power-intensive, and expensive, limiting their deployment to specialised military and research platforms. If compact quantum magnetometers can be manufactured at scale and integrated into standard marine robotics platforms, they would substantially expand the population of vehicles capable of conducting magnetic anomaly detection, subsea navigation, and infrastructure inspection. The long-term vision of networks of sensors operating together across vehicles, infrastructure, and distributed environments aligns with the broader trajectory of the ocean technology sector toward integrated, autonomous, and multi-sensor monitoring architectures.