How to use an ultrasonic cleaner
Updated: October 2026
You have a heated bath of about 10 litres on the bench, and the first cycle either works or marks the tank. How to use an ultrasonic cleaner at this size is a fixed order: fill to the line, warm the fluid, degas, load the basket, run the time, rinse, then unplug and empty. Skipping the degas, resting a part on the floor, or pouring fuel into a warm tank is how a bath seems to do nothing, or becomes a hazard. This page is that sequence, not a ranking. Prices are on the [10L ultrasonic cleaner comparison](/hub/workshop/10l-ultrasonic-cleaner). Products Compared is passing on maker instructions and the review notes in this set, not a lab method.
You have a heated bath of about 10 litres on the bench, and the first cycle either works or marks the tank.
You have a heated bath of about 10 litres on the bench, and the first cycle either works or marks the tank. How to use an ultrasonic cleaner at this size is a fixed order: fill to the line, warm the fluid, degas, load the basket, run the time, rinse, then unplug and empty. Skipping the degas, resting a part on the floor, or pouring fuel into a warm tank is how a bath seems to do nothing, or becomes a hazard. This page is that sequence, not a ranking. Prices are on the 10L ultrasonic cleaner comparison. Products Compared is passing on maker instructions and the review notes in this set, not a lab method.
Our top picks
| Badge | Product | Timer | Basket | Heater | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  DK SONIC DK SONIC DK-1000HP-IE | Up to 30 min | 272 × 205 × 87 mm | 300 W, 20–80 °C | 6.1 | about £209.99 | View offer |
 SDKEHUI SDKEHUI 10L digital | 1–30 min | Stainless | 0–80 °C | 6.4 | about £129.50 | View offer | |
| Best value |  SDKEHUI SDKEHUI 10L heater | Up to 60 min | Wire and ball | Max 80 °C | 5.3 | about £124.99 | View offer |
On this page
Fill and heat before you load
These listings do not print a fill diagram, so follow the mark in the tank you have. The working level sits below the rim. VEVOR’s UK page for a bath sold as 10 litres states a 9.5 litre maximum and a 7.55 litre water-level capacity, which shows how far a title can sit above the line you should use. Fill with the basket out. Plain tap water will run the machine. It will not shift fuel varnish on its own.
Heat before the parts go in. Durston’s instructions put a usual band around 40 to 60 °C and warn against running at 80 °C for long periods. Many baths here offer a dial up to 80 °C. That stop is the machine’s limit, not the fluid’s. If the bottle says 50 °C, or not above 55 °C, the bottle wins. Fluid bands for a carburettor are on the ultrasonic cleaner carburettor page.
Empty weights here are about 6 to 7.2 kg, and a realistic fill adds several kilograms. One UK review on the DK SONIC DK-1000HP-IE says that bath has to be carried to the sink. Plan that walk before you fill, or fit a drain you have checked.
Degas the fresh solution
Fresh water holds dissolved air. While that air remains, cavitation is patchy and the wash looks weak. Degas means running the ultrasonics with no parts in the tank until bubbles stop streaming off the walls. Durston puts that at about 5 to 10 minutes. Ultrawave says at least 10 minutes. Use the longer figure if the tank is cold, and stop when the streams ease rather than when a round number feels tidy. Repeat it every time you change the water, not only on delivery day.
A degas button, which the DK SONIC DK-1000EP-UK names, is a label for this run. A plain timer does the same thing if you set 10 minutes and leave the basket out. Do not load one small part to save time. That part sits in a gassy bath and you learn the wrong lesson. Keep the level up. Branson’s caution is not to let the level fall far below the operating line. Top up to the mark, then degas again if you added a lot of fresh water. Only after the streams have calmed do you put the basket in.
Basket, time, and rinse
The basket is not optional packaging. Durston, Ultrawave, and Branson say parts must not sit on the tank floor, where the transducers drive the bath. A part resting there masks that drive and can fret the steel. On the DK SONIC listings the basket is about 272 × 205 × 87 mm. If the part does not fit that basket, it does not fit the job, even when the title says 10 litres. A ball basket, included with the SDKEHUI heater, is for loose small pieces. Do not tip those pieces loose into the tank.
Set a modest time, then extend it if soil remains. Knob baths here stop at 30 minutes. One SDKEHUI runs 1 to 30 minutes, the other up to 60, and the DK-1000EP-UK states 1 to 120 minutes. None of those maxima is a recommended carburettor cycle. There is no minute count in these sources for a named ASIN, so do not invent one. A watch chain that comes clean quickly does not set the time for a varnished jet.
Rinse as soon as the cycle ends. Loosened soil dries back on if the part sits. Durston suggests a rinse, and deionised water if spots bother you on a bright surface. Workshop parts can take clean water and a blow-dry. Empty only after you have switched off and unplugged. Take the basket out first so you are not pouring around a metal load.
What to stop for
Never run the bath empty. Without fluid the transducers have nothing to work into, and the usual result is a damaged tank. Never put your hands in while it is sonicating. Ultrawave states that directly. Switch the ultrasonics off before you move a part, then use the basket.
Keep flammable solvent out. Branson rules out alcohol, petrol, and other flammable solutions. HSE guidance EIS21 notes that ultrasonics heat a bath, and that a warmed solvent should stay at least 15 °C below its flashpoint. Water-based fluid only, as Durston states. A little washing-up liquid in water is a light mix for lightly soiled items. It is not a carburettor chemical. If a workplace uses a hazardous substance, COSHH applies. A listing bullet does not replace that.
Unplug if you smell burning, if a fuse blows, or if the unit will not come on. More than one UK text on the SDKEHUI heater, and several on the DK-1000HP-IE, describe a unit that died early or blew a fuse. Do not keep replacing the fuse to finish a job. An EU plug is a stop, not an adapter you improvise. These baths are not sterilisers. If a stone is loose or you cannot name it, that decision belongs with a jeweller, which the ultrasonic cleaner jewellery page sets out.
Common questions
How full should a 10 litre tank be?
Fill to the mark in that tank, below the rim, before you add parts. A 10 litre title is not a 10 litre working fill. VEVOR states 9.5 litres maximum and 7.55 litres at the water line on one UK page sold as 10 litres. If your bath has no mark, stay well below the rim.
Do I degas every time I change the water?
Yes. Fresh water brings dissolved gas back. Durston suggests about 5 to 10 minutes, and Ultrawave says at least 10 minutes, until bubbles stop streaming off the walls. A degas button is optional. The run is not.
Can parts sit on the bottom if I am careful?
No. The basket exists so nothing rests on the radiating floor. Careful placement still masks the transducers and can mark the steel. If the part will not sit in the basket, it does not go in. A 10 litre title is not an exception.
Can I use washing-up liquid?
A little in water is fine for lightly soiled items when the manual allows a water-based fluid. It will not dissolve fuel varnish in a jet. For oily engine parts, use a fluid whose label names the metal, at that label’s temperature.
When do I rinse, and can I empty it while it is plugged in?
Rinse as soon as the time ends, so loosened soil does not dry back on. Then switch off and unplug before you empty. One review on the DK-1000HP-IE says that bath is carried to the sink. Take the basket out first. Check a drain barb threads in before you rely on it.
Why must I not run it empty, and is a loud bath a fault?
An empty run leaves the transducers working into air and can damage the tank. These sources do not give a decibel figure, so noise alone is not a fault we can score. A burning smell, a blown fuse, or a unit that will not start is a fault. Unplug it and stop.
Is this bath a steriliser?
No. Do not use it on dentures, retainers, or instruments and call the result sterile. The cycle loosens soil in a water-based fluid. It does not replace a medical or instrument process, and a listing that mentions those items has not shown a sterilisation claim we could verify.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Updated October 2026.
- GOV.UK: Electrical Equipment (Safety) Regulations 2016 (retrieved October 2026)
- Electrical Equipment (Safety) Regulations 2016, regulation 35 (retrieved October 2026)
- HSE EIS21: Ultrasonic cleaning (retrieved October 2026)
- HSE: COSHH and cleaning (retrieved October 2026)
- National Association of Jewellers: Caring for jewellery (retrieved October 2026)
- DK Sonic UK: 10 litre digital ultrasonic cleaner (retrieved October 2026)
- Durston: Ultrasonic cleaner instructions (retrieved October 2026)
- VEVOR UK: 10L digital ultrasonic cleaner (retrieved October 2026)