Ultrasonic Systems for Precise Cleaning Applications
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How Ultrasonic Generators Provide Optimum Cleaning Results

July 6, 2023

Editor’s Note: This article was originally published in June 2018 and has been updated with additional information and reposted in July 2023.

Technological advancements play a pivotal role in shaping every industry, from aerospace and automotive to healthcare and electronics. Ultrasonic cleaning technology stands out as an innovative approach that provides significant benefits across numerous industries. At its heart is an ultrasonic generator – an advanced component designed to produce optimal cleaning results by producing high-frequency electrical signals that are converted into ultrasonic waves.

Understanding Ultrasonic Cleaning Technology

Ultrasonic cleaning, an integral component of modern industrial cleaning, takes advantage of cavitation and acoustic streaming to achieve unmatched levels of cleanliness. These principles, together with the advantages over other traditional cleaning methods, make ultrasonic cleaning the go-to solution of choice in many industries.

The Underlying Principles of Ultrasonic Cleaning

At the core of ultrasonic cleaning is the principle of cavitation. Ultrasonic cleaners produce high-frequency sound waves that travel through a cleaning solution, creating areas of high and low pressure. During low-pressure cycles, minute bubbles or “cavities” form in the cleaning solution. When high-pressure returns, these bubbles collapse or “implode,” producing a high-energy jet of fluid that dislodges contaminants from the surface of the part being cleaned. This intense action penetrates even the tightest crevices to eliminate dirt, grime, oil, or any other contaminants without harming surfaces – ideal for cleaning items that would take a lot of time using manual cleaning action to complete.

Acoustic streaming also adds to the cleaning process, helping remove loose particles while refreshing the cleaning solution at the surface of the part. When combined with cavitation, acoustic streaming offers an efficient cleaning method far superior to manual cleaning methods using chemicals or manual methods alone.

The Role of Ultrasonic Generators

Ultrasonic generators serve as the power sources of ultrasonic cleaning systems. They generate high-frequency electrical signals through a process called transduction. These vibrations are transformed into mechanical vibrations through transduction to a transducer which produces ultrasonic waves responsible for creating cavitation bubbles that facilitate cleaning action.

To fully understand ultrasonic generators, it’s important that we examine their key components:

  1. Transducer: A transducer is a crucial component that transforms high-frequency electrical signals generated by the power supply into ultrasonic waves. Most ultrasonic transducers now utilize piezoelectric materials, such as quartz crystals.
  2. Power Supply: The power supply provides the electrical energy the transducer needs to generate ultrasonic waves. A stable and reliable power source is critical for consistent, high-performance cleaning.
  3. Generator Circuit: The ultrasonic generator circuit controls both frequency and power of the ultrasonic waves. Advanced generator circuits, such as those used in Kaijo’s ultrasonic generators, allow users to fine-tune these parameters for customized cleaning processes in different applications.

These components work together to create an efficient and effective ultrasonic cleaning process. The transducer converts high-frequency electrical signals from the power supply into ultrasonic waves, while the generator circuit ensures optimal frequency and power output.

Ultrasonic generators, with their durable construction and top-grade components, ensure reliable and efficient cleaning processes. By using a top-notch ultrasonic generator like those offered by Kaijo, industries can significantly enhance their cleaning operations to achieve superior results.

How to Select an Ultrasonic Generator

Selecting the right ultrasonic generator suitable to your particular application requires taking several factors into consideration.

Frequency Settings:

The frequency setting on an ultrasonic generator determines both the size and intensity of its cavitation bubbles, as well as their implosion. Lower frequencies create larger bubbles for aggressive cleaning action suitable for robust parts with heavy contamination. Higher frequencies create smaller bubbles which provide gentle yet thorough cleaning action, suitable for delicate parts made of soft materials.

Power Requirements:

Power considerations involve both generator consumption and the power output to the cleaning bath. Higher power output will typically increase cavitation rates for faster cleaning processes. However, to protect the parts being cleaned, sufficient power must be allocated based on the size of the cleaning tank and the part being cleaned.

Variable Controls:

Some cleaning applications necessitate frequency and power adjustments during the cleaning cycle. Kaijo’s ultrasonic generators are equipped with variable controls and other features for enhanced flexibility in optimizing cleaning efficiency and effectiveness.

When identical parts need to be repeatedly cleaned with the same type of contamination, a generator with set frequency and power settings can provide consistent and effective results. If your cleaning tasks involve various parts with different contaminants, an ultrasonic generator with adjustable settings will provide the flexibility needed to handle different cleaning applications effectively.

Overview of Kaijo’s Generator Models

Kaijo offers a range of ultrasonic generators suitable for various applications. The Phenix Legend II provides reliable performance with precise control features, making it the ideal solution for a wide range of cleaning tasks. The Phenix Hyper is a versatile generator capable of operating at 78kHz with normal or Hyper mode waveforms, perfect for business operations with fine feature cleaning requirements. Finally, the Phenix+ generator was specifically developed to handle high-power heavy-duty industrial cleaning applications.

Kaijo’s ultrasonic generators stand out for their robust design, reliability, and user-friendliness. Constructed to deliver consistent cleaning performance even in demanding industrial environments over extended periods, their user-friendly interface enables operators to adjust settings quickly and monitor cleaning progress for optimal results.

By carefully considering your cleaning requirements and selecting a suitable ultrasonic generator, you can leverage the full power of ultrasonic cleaning to achieve superior cleaning results consistently.

Enhancements to Optimize Cleaning Results

Technological advances in ultrasonic generators have drastically enhanced their performance and efficiency.  Combined with their automation and control systems integration, these enhancements provide optimum cleaning results to meet individual cleaning requirements.

Frequency Tuning Options for Customized Cleaning Applications

Kaijo’s ultrasonic generators feature advanced frequency tuning options. Users can customize cleaning processes for different materials and contaminant types by adjusting frequency modes. In particular, Kaijo’s Phenix Hyper series of generators can be used in a standard sweep frequency mode or a new “Hyper mode” that provides a uniform ultrasonic pattern to optimize cleaning performance.

Intelligent Monitoring and Control Features for Precise and Efficient Cleaning

Modern ultrasonic generators, such as those from Kaijo, offer intelligent monitoring and control features.  These features allow for real-time monitoring of the cleaning process and enable adjustments as needed to ensure effective and efficient cleaning. This not only optimizes the cleaning process but also minimizes energy consumption.


Ultrasonic cleaning is an advanced approach that harnesses cavitation and acoustic streaming for effective cleaning. At its heart lies an ultrasonic generator – a device that generates high-frequency electrical signals that are converted into ultrasonic waves. This, along with the transducer, power supply, and generator circuit, produces high-frequency ultrasonic waves capable of inducing cavitation within cleaning liquid.

Kaijo’s advanced ultrasonic generators, including the Phenix+ and Phenix Hyper models, include features that ensure optimal cleaning results. Their cutting-edge features, such as sweep frequency and fully digital control systems, stand out among their competitors. In addition, Kaijo’s commitment to quality and innovation ensures the robustness and reliability of its generators.

Kaijo stands as an example of quality, customer satisfaction, and continual improvement. Make them your trusted name in ultrasonic cleaning. Contact Kaijo for a free consultation to discuss your industrial cleaning requirements.