Patented Electromagnetic Field Signalling

Bringing AI to the Physical World

Our patented technology carries data through water, ice and ground — enabling continuous monitoring in environments where traditional wireless and cabled infrastructure simply can not operate.

Our Vision

Extending the reach of IoT and Physical AI beneath the surface

The world is increasingly driven by connected sensors, intelligent automation, and AI-powered decision-making, yet vast portions of the physical environment remain inaccessible to conventional wireless communications. Oceans, rivers, reservoirs, subsea infrastructure, under-ice environments, and buried assets represent some of the most critical and least connected regions on Earth.

CSignum's vision is to extend the reach of IoT and Physical AI beneath the surface — enabling continuous monitoring and real-time intelligence in environments where traditional radio-based networks cannot operate. CSignum empowers organisations to manage water quality, protect critical infrastructure, improve environmental stewardship and enhance operational efficiency for the next generation of intelligent systems.

As the world becomes increasingly dependent on data-driven decisions, CSignum is connecting the last major frontier of the Internet of Things — the hidden environments beneath the surface.

Resilient Wireless Communications

One technology that breaks through barriers

Traditional wireless networks do not work underwater, through ice or underground. CSignum's patented Electromagnetic Field Signalling (EMFS) carries data across the boundaries with no cables and no compromise.

See how it works

The EM-2 Platform

One patented core technology — Electromagnetic Field Signalling — packaged into three field-proven products for the world's challenging environments.

EM-2Q

Wireless Water Quality Monitoring

A transformative wireless solution for any industry tasked with water quality monitoring — from rivers and reservoirs to combined sewage overflows.

  • Reduced environmental impact
  • Seamless integration with industry-leading sondes
  • Reliable, real-time data
  • Reduced risk of vandalism and theft · consistent cost per site
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CSignum EM-2Q device
EM-2

Wireless Through Water, Ice & Ground

The platform that pioneered carrying data with low-frequency electromagnetic fields — naturally crossing boundaries that stop acoustic and RF systems.

  • Performance unaffected by biofouling, turbidity or environmental noise
  • Integrated with leading multiparameter sondes and sensors
  • No adverse effects on aquatic life
  • Bidirectional point-to-point and multi-point comms
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CSignum EM-2 device
EM-2S

Wireless Ship Hull Monitoring

Purpose-designed to mount below the waterline, providing reliable two-way data from hull-mounted sensors to a topside unit — no cables through the hull.

  • Reliable transmission from hull sensors to topside, no penetrations
  • Integrates with a variety of sensors for a holistic hull view
  • Real-time data enables proactive, predictive maintenance
  • Non-intrusive design; can be welded by commercial divers
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CSignum EM-2S device
Compare the range

Find the right EM-2 for your environment

Primary use
Water quality monitoring
Through water, ice & ground
Ship-hull monitoring
Environment
Rivers · reservoirs · coastal
Subsea · environmental
Marine vessels
Range
Up to 100m
Up to 100m
Hull to topside
Carrier
EMFS
EMFS
EMFS
Sensor integration
Through-ice capable
Sonde integration
Airbag recovery
Retrofit / weldable
Patented EMFS

Pioneers of wireless communications using electromagnetic fields

We pioneered carrying data with electromagnetic field signalling — naturally crossing the boundaries that stop acoustic, optical and radio systems, so you can monitor where nothing else can reach.

See the technology
0 m
Up to 100m, from below the surface to above
# 0
First & only EMFS data platform
0 %
Cable-free topside deployment
0 /7
Continuous real-time monitoring
Industry Memberships

Collaborating to build resilient water networks

Proud to work alongside leading organisations advancing smart water technologies and the Internet of Underwater Things.