Parts: The parts you need to clean – and their particular characteristics, from shape and size to durability and composition – can dictate what unit and size is best suited to do the job.Power: Most ultrasonic generators are single-phase 120 Volt AC or single-phase 220 Volt. You should check with the manufacturer for specific supply voltage and frequency specifications for your ultrasonic cleaner.Portability: Do you anticipate that you’ll need to move your ultrasonic cleaning machine to different locations in your facility? If so, you may want to consider a cleaning machine with casters for easy movement. Contaminants: When you’re cleaning oils, water-based coolants and light dirt from industrial or other parts, a unit with side-mounted or bottom-mounted transducers should be adequate, since oil floats, and minimal dirt will settle on the bottom of the tank.For heavily soiled items, it’s best to choose a unit with side-mounted transducers, since the large volume of dirt, carbon and grime that falls to the bottom of the tank during cleaning could sit atop transducers in a bottom-mounted unit and muffle the sound, thus limiting the cleaning power.Multistage options: Ultrasonic parts cleaning machines generally come in one-, two- and three-stage systems. The part or parts you need to clean, as well as the rinse that’s necessary to get the job done, and the extent to which hot drying is necessary, usually determines which one is right for you.Location and environment: Within a facility and outside of it, location and environment are important factors in determining where ultrasonic cleaners should be placed in a facility, and what, if any, special equipment is necessary to protect them from atmospheric and temperature elements.