Ultrasonic Generator offers selectable range of 25-250 kHz.

Designed to control ultrasonic spray processes using Sono-Tek ultrasonic nozzle technology, ECHO Ultrasonic Generator automatically locks onto nozzles’ operating frequency with phase-locked-loop technology. Unit provides

[source: http://news.thomasnet.com/fullstory/Ultrasonic-Generator-offers-selectable-range-of-25-250-kHz-20023728]