CSignum Equipment
EM-2S
Hull-mounted unit fitted below the waterline that wirelessly links underwater sensors to a topside EM-2 unit for under-ship and propulsion monitoring.
Description
EM-2S is purpose-designed to be mounted on marine vessels below the waterline, giving the shipping industry, navies and coastguards two-way wireless communications from hull-mounted sensors to a topside EM-2 unit without cabling. It replaces manual inspections with continuous, real-time data, supporting proactive maintenance. CSignum's EMFS technology also provides the data link for Thordon Bearings' BCM-W wireless propeller shaft bearing wear measurement system.
Key features
- Two-way wireless data transmission from hull-mounted sensors to the deck using electromagnetic field signalling
- Integrates with a variety of sensors to monitor environmental parameters and security around the hull
- Wireless retrofitting of sensors and controls; can be welded by commercial divers while the ship remains afloat
- Non-intrusive design for minimal disruption to marine life
Applications
- Propulsion system wear, strain and efficiency monitoring
- Detection of security threats to maritime assets
- Control and release of underwater objects
- Data exchange with dockside monitoring systems
- Environmental compliance monitoring
A through-ground EM-2S variant for geotechnical and infrastructure monitoring (up to 100 metres, with mesh networking) was announced in November 2026.
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