Passive intrusion detection
for critical infrastructure.
We protect solar farms, substations, telecom sites and transport hubs by reading subtle changes in the wireless environment that already surrounds them. No fences. No transmissions. No detectability.
The wireless world is already a sensor.
Civil, telecom and satellite signals saturate every site on Earth. We turn that ambient field into a perimeter.
A handful of discreet receivers placed around an asset measure the channel between source and receiver. When a person, vehicle or drone crosses the area, the channel changes. We see the change. We classify it. We alert.
We never transmit. Adversaries cannot easily detect us, jam us through transmission, or trigger us by spoofing. There is no spectrum licence to obtain, no radar approval to clear, no light or noise signature to mask. We are present without being seen.
If the sun is eclipsed by the moon, you notice. The signal is dimmer. The same principle, applied to ground-level intrusion at the scale of a single asset.
Distributed infrastructure is suddenly the front line.
Solar theft has industrialised.
European solar farms lose an estimated 1–5% of asset value annually to copper theft and vandalism. Documented incidents at utility-scale parks routinely exceed €0.5–2.5M including downtime and repair. Copper prices reached record highs through 2025.
Drones crossed from hobby to threat.
Between September and November 2025, drone incidents quadrupled at European airports and critical infrastructure. Copenhagen, Oslo, Munich, Brussels, Liège, Doel, Volkel, Landvetter — coordinated, deliberate, attributed to state-level hybrid activity.
Regulation now mandates physical resilience.
The EU NIS2 Directive and the Critical Entities Resilience (CER) Directive together require operators across 18 essential sectors to detect, respond to and report on physical incidents at critical sites. Compliance, not preference.
Existing tools have visible gaps.
Fences take months to build. Guarding does not scale. Cameras see line-of-sight only and generate false alarms in weather, vegetation and darkness. Active radar is costly and emits a signal of its own that adversaries can detect and avoid.
Passive. Distributed. Multi-modal by design.
An invisible sensor mesh that retrofits to assets you already operate, without trenching, fencing or new power infrastructure.
Passive
We never transmit. Adversaries cannot easily find us, jam us, or know we are listening. No spectrum licensing, no radar approvals, no emissions to manage.
Distributed
Low-power receivers around an asset, deployable in a day. Solar-powered. Battery-backed. No trenching, no cable runs, no fence dependency.
Integrable
RF sensing as the primary modality, with optional cameras and motion sensors for verification. Built to integrate into existing VMS and SOC stacks via standard protocols.
Built on six years of applied research.
Liminal Sensing is the operational venture of FADEC, a Swedish applied-research company established in 2018 in Gothenburg, focused on connectivity, signal processing and satellite technology. The technology we are now commercialising emerged from that research base.
European Innovation Council
Multi-year EIC project (2025–2028) supporting the development and field validation of passive RF sensing for critical infrastructure.
Thales
Strategic technology partner on the EIC project, contributing systems expertise and integration pathways.
Chalmers University of Technology
Founding research home. Sweden's leading technical university in signal processing, applied mathematics and microwave engineering.
Uppsala University — Ångström Laboratory
RF and microwave engineering research base. Two of our founders hold senior academic positions there.
A team built around signal.
Applied mathematicians, RF engineers and an operator who knows how to ship.
Docent in Applied Mathematics. Two decades of research at the intersection of machine learning, signal processing and control. Sets the technical direction.
Senior Lecturer in RF and Microwave Engineering at Uppsala University. Specialist in microwave systems and antenna design. Leads the sensing-stack research.
Commercial strategy and go-to-market. Background in AI strategy and organisational change across European industry.
RF measurement, system characterisation and field deployment. Brings the lab to the site.
Get in touch.
If you operate distributed critical infrastructure and want to talk about a pilot — or if you invest in deep-tech protecting the European energy and security base — we would like to hear from you.
team@liminalsensing.com