Single frequency, literally, means that there is only one kind of dual frequency, that is, there are two different frequencies that can be switched for use. For example, an ultrasonic wave that emits 28KHz alone is a single frequency;

If there are 28KHz and 40KHz ultrasonic waves and they can be switched, they are dual frequency. 28KHz refers to 28000 vibrations per minute, the same with 40KHz. Although the single frequency ultrasonic cleaners on the market are more widely used (industrial ultrasonic cleaners, large ultrasonic cleaners, household ultrasonic cleaners, etc.), and most ultrasonic cleaners use single frequency 28KHz, 40KHz and other frequencies, no matter whether they use high-frequency or low-frequency ultrasonic, they generally can only work near a fixed frequency point with single working conditions, It cannot meet the requirements of some units (medicine, laboratory, scientific research unit, etc.) that sometimes need to use two or more frequencies. The dual frequency ultrasonic cleaning machine just combines the respective advantages of high-frequency ultrasonic and low-frequency ultrasonic. It can switch different frequencies according to different cleaning needs. It not only realizes multiple use of one machine, but also saves cleaning costs and avoids the complexity of replacing multiple equipment.