The System

The System

an environmentally friendly and cost effective solution with minimal maintenance

The Sonihull Ultrasonic Antifouling Protection System is a unique and high-tech electronic antifouling solution in almost all applications of industry where marine fouling must be combated.

With a variety of applications the system is cost effective and environmentally friendly offering additional benefits when used in combination with anti foul paints for hull protection. Therefore ensuring a reduction in fuel consumption of up to 20%.

The System combats marine fouling in sea chests and strainers, conventional- and box coolers, sea water manifolds and raw water piping, resulting in a reduction in maintenance and annual haul-out costs, reducing fuel costs and therefore optimizing performance.

Extensive testing on civilian and military vessels has proven the Sonihull System to be the most effective solution for the protection on marine fouling on water jet drives.

The System is applied on Kamena Rolls Royce, Hamilton and Alamarin, to ensure a clean and balanced functioning so performance is maintained and fuel consumption is optimized. The result is less maintenance and reduced operating costs.

The Sonihull can be applied on all hull material such as:

  • aluminium
  • steel
  • GRP
  • Carbon,
  • HDPE
  • Ferro-cement 
  • Cunifer (cupro nickel)
  • Wavistrong ™ (Future pipe)


Control Box

  • Control Box (rugged / IP55)
  • Each transducers has it’s own ultrasonic generator
  • PSU – CE and UL approved
  • Monitor output for system integration
  • Low power consumption (3,6W / transducer)
  • Power supply auto selects offered voltage: 12 – 24 VDC /  110 – 230 VAC (50-60 Hz)


  • Transducer (rugged / IP68)
  • Transducer of reinforced nylon
  • Transducer surface: no metal – no electrolysis risk
  • Low overall installation height – just 73 mm
  • Molded transducer cable – standard 6,5m
  • Extension up to 15m
  • Noiseless functioning

The technology

The Sonihull System utilizes the latest ultrasonic transducer technology, producing multiple bursts of ultrasonic energy in a random range of frequencies and as a result destroying micro organisms such as algae being the matrix of marine growth .

The ultrasonic energy produces a pattern of alternating positive and negative pressure, producing microscopic bubbles which arise during periods of negative pressure and implode during periods of positive pressure, a phenomenon known as “cavitation.”

The implosion creates a micro-jet action providing a cleaning effect on the surface. The removal of this initial link in the food chain inhibits marine growth such as barnacles and other marine life that feed on the algae.

On box coolers

The ultimate solution in combatting marine fouling on box coolers and heat exchangers

With it’s patented technology the Sonihull Soni8 System protects any box cooler configuration with transducer leads up to 80 meters and is by far the only solution in the world, independent of the choice in heat exchanger, in combating marine fouling on both box coolers as on conventional heat exchangers.

An environmentally friendly solution where you are ensured to have minimal maintenance.

On hull


On sea chest – strainer – manifold – pipe work

On water jet drives


On IPS drives

The mechanism of ultrasonic antifouling

Ultrasonic cleaning is used industrially for decades. The surface mechanisms of ultrasonic cleaning are well understood as a combination of two effects, both a result of the collapse of cavitation bubbles near the surface of an object through the formation of a corresponding shock wave and re-entrant microjet. With sufficient acoustic pressure, during the rarefaction of a sound wave, the rapid decrease in pressure results in the formation of a void bubble, or tear, in the liquid which rapidly grows, and collapses violently during a subsequent compression wave.


The ultrasonic treatment not only has a cleaning effect on antifouling paints but also destroys micro organisms such as algae being the matrix of marine growth.
Microbiological and bacterial growth in water- and diesel oil tanks is a serious problem. The presence of water in fuel tanks results in the proliferation of yeasts and fungi at the fuel/water interface where microbial contaminants extract oxygen from the water and nutrients from the fuel layer. The result is e.g. mat-like or slimy deposits, blocking valves, filters, injectors, pumps etc. and accelerating corrosion.
Ultrasonic treatment effectively destructs and prevents organisms to develop through vesicle collapsing and cell fracturing.
It is therefore not necessary to apply chemical treatment for potable water tanks. Nor treat diesel oil tanks with potent biocidal agents.