Heavy-duty digital generators perform intermittent welds at operating frequencies of 20 kHz, 30 kHz, and 35 kHz, with a power range of 900 W to 6200 W. Programmable start time and decay time and no amplitude regulation are just a few of the features in the range. ULTRAPLAST Digital Ultrasonic generator is integrated with all Herrmann Ultraschall standard machines and systems.