To achieve optimal cleaning performance with an ultrasonic cleaner, selecting the correct frequency is critical. In laboratories, residual chemical reagents in petri dishes and micro-contaminants on pipette tips demand precise removal to ensure reliable experimental data. In industrial production, stubborn oil stains on mechanical parts and sintered residues on automotive components rely on high‑frequency vibration to break down contaminants. For precision electronic components, the right frequency removes dust and particles without causing damage. Mastering frequency selection will solve a wide range of cleaning challenges. Below, we explain the unique cleaning advantages of different frequencies.,

I. Cleaning Characteristics of Different Frequencies

An ultrasonic cleaner mainly consists of a cleaning tank, transducers, a generator, and a control panel. The frequency produced by the transducers directly determines cleaning effectiveness.

Frequency Type	Typical Values	Cleaning Principle	Suitable Items	Application Scenarios
Low Frequency	25–28 kHz	Fewer vibrations but stronger impact, generating large bubbles with powerful cavitation energy	Wear-resistant surfaces, heavy contamination	Pre‑cleaning of machined parts, heavy‑duty degreasing for auto parts, kitchen utensils with thick oil
Medium Frequency	40 kHz	More vibrations, gentler force, small and dense bubbles	Precision, fragile or high‑surface‑finish items	Electronic components before assembly, jewelry maintenance, optical lens cleaning
High Frequency	60–200 kHz	Focused acoustic wave, ultra‑fine bubbles, concentrated but mild energy	Ultra‑precision, zero‑damage requirements	Semiconductor chip processing, high‑purity lab glassware, MEMS precision components

Quick Guide:

Thick, stubborn dirt → choose low frequency

Light dirt & delicate items → choose medium frequency

Ultra‑delicate, high‑precision items → choose high frequency

II. Key Factors to Improve Cleaning Performance

In addition to frequency, the following factors further enhance results:

Cleaning Media

Common options include chemical solvents and water‑based cleaners. The combination of chemical action and ultrasonic physical vibration delivers more thorough cleaning.

For oil stains: Use a dedicated degreaser for improved efficiency.

For optical lenses: Use a mild, neutral cleaner to safely remove fingerprints and dust.

Power Density

Higher power speeds up cleaning, but delicate items require controlled power and duration to avoid damage. For fragile glassware, reduce power and extend cleaning time appropriately.

Cleaning Temperature

Ultrasonic cavitation performs best at 30–40 °C. When used with cleaning agents, 40–50 °C often yields optimal results. Moderate heating accelerates chemical reactions and improves contaminant dissolution.

III. Safety Precautions

Safety is essential when operating ultrasonic cleaners:

Equipment Safety

Ensure the device is properly grounded before use.

Do not run the unit without liquid in the tank - this will damage the transducers.

Do not activate the heating function when the tank is empty.

Operating Procedures

Use a cleaning basket or holder to avoid direct contact between items and the tank bottom.

Regularly remove debris from the bottom of the tank.

Do not use flammable or explosive solvents such as alcohol or gasoline.

For corrosive or volatile cleaning agents, use an indirect cleaning method.

Liquid Level

Fill the tank to approximately two‑thirds capacity for ideal cleaning and degassing performance.

Choose a Reliable Ultrasonic Cleaner

If you are unsure which frequency or model to select, explore SCIENTZ full range of ultrasonic cleaners.We offer versatile models covering low to high frequencies:

D Series

DT Heated Series

DTD Power‑Adjustable Series

DTS Dual‑Frequency Series

DTY Sweep‑Frequency Series

Industrial Series

We also provide customized solutions to meet diverse cleaning requirements.Choose SCIENTZ - let professional frequency design deliver superior cleaning results.Contact us today for your tailored cleaning solution.