PC-620 Bransonic benchtop units are designed to ultrasonically clean pipettes and other tubular glassware. Lipids, blood, and proteins are easily removed from the capillary bore of the pipette through the cavitation process. Useful in medical and scientific laboratories. The Model PC-620 has a 2-3/4 gallon capacity cleaning tank and ultrasonic generator enclosed in a sheet metal housing. The stainless steel tank has no corner welds or other dirt catching surfaces, and is provided with a bottom mounted drain. Circuitry is solid state for long trouble-free service. High efficiency industrial piezoelectric transducers are attached to the tank bottom and operate at 40 kHz.