FAQ For Utrasonic Sonicator

Tip Depth

Probes must be submerged properly. If the tip is not submerged enough the sample will foam or bubble. If the tip is too deep it will not circulate the sample effectively. Both conditions will end up with poor results.

In the figure above: Figure A will foam and will not process the sample.  Figure B does not circulate the liquid efficiently and therefore does not process the sample.  Figure C shows that the correct setup will achieve good results in the shortest processing time.

Container Shape and Size

Narrow containers are better than wide ones. Ultrasonic energy is generated from the tip and directed downward. As the sample is processed, the liquid is pushed down in all directions. If the container is too wide, it will not mix effectively, and some samples will remain untreated on the periphery. It takes less time to process twice the volume in a narrow container than the same volume in a wider container. In addition, the probe should not touch the side or bottom of the container.

How to select probes

Certain applications, such as processing nanoparticles, often require longer processing times. Using larger probes will speed up processing and larger probes will not corrode as quickly as smaller probes.

Also, smaller probes wear out faster and require more frequent replacement. Using a larger system will eventually reduce costs over time as you consider the cost of replacing multiple probes.

Converter cooling

Prolonged sonication can cause heat to transfer up the probe to the transducer. Overheating can severely damage the transducer and ultrasound system. Samples that require continuous processing for more than 15 minutes must be air-cooled with the converter. Converter cooling is available for SPS20-1000/2000/3000 models.

Sonication and Noise

20KHz Sonication produces high-pitched noise (greater than 105dB). This can cause discomfort to users and anyone nearby. The sound enclosure reduces noise by about 30dB. The Sound Enclosure securely holds converter and probe components, so no additional supports are required.