What are the Key Factors in Successful Ultrasonic Cleaning

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What are the Key Factors in Successful Ultrasonic Cleaning
  1. Time – varies depending upon quantity & type of contamination.
  2. Temperature – most chemistry works best at higher temperature but ultrasonic cavitation reduces above70 C.
  3. Chemistry – alkalinity/acidity, surfactants, wetting agents, dispersants, emulsifiers, saponifiers, sequestrants, inhibitors, defoamers etc.. are all part of the equation in taking the contaminant off without damaging the part being cleaned. The correct chemistry will depend upon the composition of the contaminant and the part being cleaned.
  4. Transducers – must be placed at the correct distance on the tank walls and from the parts being cleaned. Badly placed or bonded transducers will affect the power, uniformity and durability of the cleaning action.
  5. Frequency – Lower frequency for denser harder items with hard dirt, higher frequency for delicate smaller items with smaller particulate contaminant requiring a finer clean. 40KHz is often cited as the “sweet” spot for general cleaning.
  6. Power – This is usually measured as watts per litre of INPUT power. In tanks of a capacity less than 200 litres 13-25 watts per litre is usually cited as optimal, for tanks greater than 200 litres 5-12 watts per litre. Whilst this is the most frequently quoted measure of ultrasonic capability it must be recognised that:
    • This measures input power not effective output as reflected in cavitation;
    • Temperature, chemicals in the solution, loading, baskets, transducer placement all affect the effective cavitation produced from any given power input.
  7. Loading of parts being cleaned affects the ultrasonics and general cleaning effectiveness dramatically. Generally the parts being cleaned should be less than half the weight of the solution in the tank.

The number and variety of parameters determining the effectiveness (or otherwise) of your ultrasonic cleaning does make it difficult to select both the correct machine and chemistry for your needs. The best way of approaching it is to view ultrasonics as just one element in an overall cleaning process that gets your part to the required level of cleanliness.

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We approached Sonic Solutions after our parts manufacturers let us down and wasted precious time by supplying oily parts. Not only were they friendly, helpful and happy to rush our parts through - the quality was unbelievable! They arrived back at our factory just in time to not hold up production and we couldn't recommend them highly enough.

Martin Frings


Our company AssetCool found the entire team at Sonic Solutions to be responsive and incredibly supportive of a new project. Their technical knowledge is superb, and they delivered exactly what they promised. We're very happy to recommend them to anyone with ultrasonic cleaning needs, and look forward to working with them again in the future.

Tonia Parris


I reached out with a problem to various companies prior to talking with Sonic Solutions, most were unhelpful. These guys insisted on the first trial being for free! The job was excellent and the turn around time very impressive. We are now setting up a monthly cleaning regime with them. A joy to deal with.

Andy Sim


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