A lower frequency such as 28 kHz makes larger, harder-hitting bubbles for rust and heavy grease, while 40 kHz and above clean finer detail more gently. Dual-frequency tanks let you switch between the two. A sweep mode moves the frequency slightly up and down to break up standing waves, so cleaning is more even across the tank.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Best Dual-Frequency and Sweep Ultrasonic Cleaners: Under 3 L
- Elmasonic P30H#1 of 1Full review
A dual-frequency lab and dental bath with every cleaning mode, for work where 80 kHz matters. Its price only makes sense for that kind of work.
Amazon $1,699$1,6992.8 L120 W37/80 kHz sweep
Best Dual-Frequency and Sweep Ultrasonic Cleaners: 3 to 10 L
- U.S. Solid 3L Dual-Frequency#1 of 6Full review
The most powerful small tank for its size, with dual frequency and degas, for shop parts and jewelry alike.
Amazon $128.97$128.973 L200 W28/40 kHz - EIWEI CD-E3 3L Dual-Frequency#2 of 6Full review
A 3 L dual-frequency tank with degas, for buyers who want a gentler 40 kHz setting and a stronger 28 kHz one in a small footprint.
Amazon $117.98$117.983 L120 W28/40 kHz - SupRUCCI ST-6L Sweep Ultrasonic Cleaner#3 of 6Full review
A 6 L parts tank with sweep and adjustable power, aimed at carburetors, chains and gun parts.
Amazon $148.79$148.796 L180 W40 kHz sweep - EIWEI CD-E6 6L Dual-Frequency#4 of 6Full review
A 6 L dual-frequency tank with degas and a long timer. Its listing does not say how much ultrasonic power it has.
Amazon $199.99$199.996 L-28/40 kHz - Branson CPX5800H#5 of 6Full review
A 9.5 L programmable lab bath for repeatable processes. For cleaning parts, the price is hard to justify.
Amazon $1,851.99$1,851.999.5 L-40 kHz sweep - Branson CPX3800H#6 of 6Full review
A programmable 5.7 L lab bath for labs that need repeatable runs. Shop users get far more tank for the money elsewhere.
Amazon $1,599$1,5995.7 L-40 kHz sweep
Best Dual-Frequency and Sweep Ultrasonic Cleaners: 10 L and up
- U.S. Solid 30L Dual-Frequency#1 of 1Full review
A 30 L dual-frequency tank with degas and a long timer, for large parts that also need a finer setting.
Amazon $422.97$422.9730 L500 W28/40 kHz
