Ultrasonic cleaners remove contamination by sending high-frequency sound waves through a liquid-filled tank. The process can reach holes, threads, joints and narrow spaces that are difficult to clean with a brush. This makes ultrasonic cleaning useful for compatible jewelry, optical parts, laboratory items, automotive components, hardware and manufactured parts.
What Is Ultrasonic Cavitation?
A transducer converts electrical energy into mechanical vibration. That vibration travels through the tank and cleaning liquid, producing microscopic bubbles. The bubbles repeatedly form and collapse near the surface of an immersed item. This action, called cavitation, helps loosen oil, polishing compound, dust and other contamination.
Cavitation is a cleaning process, not a guarantee that every material or coating is suitable. Results depend on frequency, power, temperature, cycle time, tank loading, cleaning chemistry and the condition of the item.
The Main Parts of an Ultrasonic Cleaner
- Tank: Holds the cleaning liquid. Many professional machines use stainless steel for durability and corrosion resistance.
- Transducers: Create ultrasonic vibration and transfer it into the tank.
- Generator: Controls the electrical signal supplied to the transducers.
- Timer: Helps the operator use repeatable cleaning cycles.
- Heater: Available on selected models. Heating can improve the performance of compatible water-based solutions, but the correct temperature depends on the item and chemical supplier's instructions.
- Basket: Keeps parts away from direct contact with the tank bottom and allows liquid to circulate.
Why Degassing Matters
Fresh cleaning liquid contains dissolved air. This air can reduce cavitation efficiency during the first part of a cycle. A degas function helps remove trapped gas before parts are cleaned. Degas the liquid after filling the tank, after changing the solution, or when the machine has been idle for an extended period.
How Frequency Changes the Cleaning Action
Lower frequencies generally create larger, more energetic cavitation bubbles and are often selected for robust metal parts with heavy contamination. Higher frequencies generally produce smaller bubbles that can provide a gentler action for fine features and sensitive components. Forty kilohertz is a widely used general-purpose frequency for many professional cleaning tasks.
For a detailed comparison, see our upcoming guide to 28kHz, 40kHz, 80kHz and 120kHz ultrasonic cleaning.
Basic Operating Process
- Confirm that the item, coating and cleaning solution are compatible with ultrasonic cleaning.
- Fill the tank to the operating level stated in the product manual.
- Place parts in a basket or suitable holder rather than directly on the tank bottom.
- Degas fresh solution when the machine provides this function.
- Start with a short cycle and inspect the result before increasing time or temperature.
- Rinse and dry the cleaned item when required by the cleaning process.
Choosing a Cleaning Solution
The cleaning liquid should match the contaminant and material. Water with a compatible cleaning concentrate is common for routine work. Aluminum, coated surfaces, soft stones and other sensitive materials may require specialist chemistry and shorter cycles. Always follow the chemical supplier's dilution, temperature and disposal instructions.
Safety note: Do not place flammable or volatile liquids directly in a standard ultrasonic tank. Use only equipment, accessories and procedures specifically rated for the intended chemical and application.
What Should Not Be Cleaned Ultrasonically?
Some porous stones, pearls, fragile coatings, cracked items, loose settings and sensitive electronics may be damaged. Test uncertain materials conservatively or ask the item manufacturer. Water resistance does not automatically mean an assembled watch or electronic device is suitable for immersion.
Cleaning Is Not Sterilization
Ultrasonic cleaning can remove soil from compatible instruments, but it does not by itself sterilize or disinfect them. Where sterilization or disinfection is required, cleaning should be followed by a separately validated process that meets the relevant professional standards.
Explore BIMOSONIC Ultrasonic Cleaners
For general parts cleaning, compare the 2L–30L stainless steel ultrasonic cleaner range. For applications requiring selectable cleaning action, review the 10L/15L variable-wave ultrasonic cleaner. Always confirm the selected model's voltage, frequency, tank dimensions and functions before ordering.
Verified Test and Operating Information
The corresponding test report records a 30% improvement in cleaning efficiency under its specified test conditions. Actual results depend on the item, contamination, solution, temperature, loading, and cycle settings.
These models do not support 24-hour continuous operation. Follow the operating and cooling intervals in the applicable model manual.