Bandelin SONOREX SUPER RK 103 H ultrasonic bath with heating, 4 litres, 326

One size larger than the RK 100 H, but with the same simple operating concept: The Bandelin SONOREX SUPER RK 103 H has a total capacity of 4.0 litres and a working capacity of 2.7 litres for cleaning tasks where a little more space is needed for instruments or small parts, without having to switch to a significantly larger bath.

Greater performance thanks to two vibration systems

Instead of a single vibration system, as in the RK 100 H, the RK 103 H features two vibration systems operating in parallel, delivering a combined peak power of 560 watts at a nominal power of 140 watts, whilst maintaining a constant operating frequency of 35 kHz. The SweepTec function ensures that this power is distributed evenly across the slightly larger tank surface without standing waves forming.

200-watt heater up to 80 °C

As with the other H models in the series, the integrated heater covers a range from 30 to 80 °C, with 200 watts of heating power and dry-run protection. Cleaning duration and temperature are set separately via two rotary knobs; the timer ranges from 1 to 15 minutes (± 5 %) or continuous operation.

Ball valve drain as a practical difference from the RK 100 H

Unlike the RK 100 H, the RK 103 H features a drain: a G 1/4 ball valve on the right-hand side allows for controlled emptying without having to lift or tilt the tank. Given the frequent changes of medium in everyday laboratory work, this is a noticeable advantage over its smaller counterpart. The tank and housing are made of 1.4301 stainless steel with a thickness of 1.0 mm; the external dimensions are 260 x 160 x 310 mm with a net weight of 4.6 kg.

Guide to choosing between the RK 100 H and RK 103 H

Anyone who regularly changes the cleaning medium or requires a working volume of more than 2.0 litres is better off with the RK 103 H (2.7-litre working volume, with drain) than with the smaller RK 100 H without a drain. If even more space is required, for example, to accommodate several beakers at the same time, the RK 510 H, with a total capacity of 9.7 litres, is the next model up in the SUPER RK series.

Product range at a glance: SUPER RK, DIGITEC DT and smart ST

Bandelin also offers the same performance class in the DIGITEC DT series, featuring push-button operation, an LED display and automatic DEGAS degassing, as well as in the smart ST series with a touchscreen and programme memory. The RK 103 H is designed for anyone who prefers simple, mechanical operation without a display. In addition, we also offer Elma Elmasonic ultrasonic baths for laboratories that already rely on this brand.

Use and maintenance

The 2.7-litre working capacity leaves room for the items to be cleaned when filling the bath; the bath should not be filled to the brim. A concentrate from Bandelin’s TICKOPUR range is suitable for use as the cleaning fluid. Before the first cleaning cycle with a freshly prepared solution, a short initial run in continuous operation helps to expel any trapped air and achieve the full cavitation effect. After the last use of the day, the tank should be drained via the ball valve and wiped dry to prevent any residues from settling.

Typical applications

• Cleaning of tweezers, scissors and smaller practice instruments
• Degreasing and cleaning of small metal and plastic parts
• Cleaning of cuvettes, filter holders and sample holders
• Heat-assisted pre-cleaning prior to further processing

Frequently asked questions

What is the difference between the RK 103 H and the RK 100 H?
The RK 103 H has a larger capacity (4.0 litres instead of 3.0 litres), two vibration systems instead of one, and a ball valve drain, which the RK 100 H does not have.

What temperature range is available?
30 to 80 °C, controlled via a separate rotary knob.

On which side is the drain?
On the right, fitted as a ball valve with a G 1/4 connection.

Is the unit equally suitable for use in medical practices and laboratories?
Yes, it is classified as a Class I medical device in accordance with Regulation (EU) 2017/745 and is CE-compliant with the Low Voltage, EMC and RoHS Directives.

Technical details

Scope of delivery

• 1x Bandelin SONOREX SUPER RK 103 H ultrasonic bath with heating
• Fixed mains lead (2 m)
• Instructions for use

The insert basket and lid are not included in the scope of delivery and are available separately.

Individual requirements and procurement service

For the K 3 CL insert basket, the D 100 lid or another model from the SUPER RK series, there is an individual procurement need. You can use our procurement service to request a quote for suitable accessories, a replacement basket or another model from the SONOREX range.