Ultrasounds transducer: an unmatched performance state-of-the-art technology

The QUATTRO-DB®, assembled by Hydro Bioscience, is the latest ultrasonic technology for treating algae, cyanobacteria and biofilm. Quattro (4-Directions) – DB (Double Bandwidth) offers innovative features that are not found in the competition. With a radial audio output operating in two different bandwidths (algae and diatoms in the lower band and cyanobacteria in the upper bandwidth) and 2024 generated frequencies, the unit is now the most powerful and most efficient in the world market. The new QUATTRO-DB® technology allows treatment coverage up to 7 ha for algae and 50 ha for cyanobacteria, depending on environmental conditions. The device is easy to install, requires little maintenance and operates 24 hours a day providing unparalleled control in different water bodies.


  • Lakes and ponds
  • Wastewater treatment plants
  • Aquaculture facilities
  • Drinking and irrigation reservoirs

Advantages of ultrasound

  • State-of-the-art technology
  • Radial sound output
  • 2024 frequencies on two bandwidths
  • Solar or electrical installations
  • Very low energy consumption
  • Completely ecological
  • Harmless to human, animals and plants
  • Significantly reduces the use of chemicals
  • Reduces TSS (biological) in wastewater treatment plant effluent
  • Reduces cost of cleaning and maintenance

How does ultrasound work

All existing materials have a critical resonance frequency at which they may suffer damage. The frequencies of QUATTRO-DB® devices are set to match the harmonic frequency of the cell membrane of algae fatally damaging them within 72 hours of contact. These frequencies also attack the biofilm and certain fungi such as Pythium.

With cyanobacteria, it is the gas vesicles that are damaged, small vacuoles that keep them buoyant in the water column and regulate their vital functions. The ultrasound pops them, causing the cell to sink to the bottom and die by lack of photosynthesis.

Humans, animals, fish and plants have different resonance frequencies and are therefore not affected by the ultrasound emitted by QUATTRO-DB® transducers.

Maximum coverageAlgae and distoms
Cyanobacteria (with vesicles)
Radius of 150m, 7 ha or 17.5 ac
Radius of 400m, 50 ha or 124 ac
Power moduleAC 24, 120, 240 V – 50 or 60 Hz50 m cable (max. 150m)
 DC 24 V – solar or batteries 
Electrical consumption20 WPeak at 50 W
Bandwiths24 – 58 kHz and 195 – 205 kHz 
Warranty3 years